/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/weaver/parallel-misc-4.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 13:23:32,936 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 13:23:33,016 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-26 13:23:33,020 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 13:23:33,020 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 13:23:33,050 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 13:23:33,051 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 13:23:33,051 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 13:23:33,052 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 13:23:33,055 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 13:23:33,056 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 13:23:33,056 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 13:23:33,056 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 13:23:33,056 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 13:23:33,056 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 13:23:33,057 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 13:23:33,057 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 13:23:33,057 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 13:23:33,057 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 13:23:33,057 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 13:23:33,057 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 13:23:33,058 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 13:23:33,058 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 13:23:33,059 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 13:23:33,059 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 13:23:33,059 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 13:23:33,060 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 13:23:33,060 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 13:23:33,060 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 13:23:33,060 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 13:23:33,061 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 13:23:33,062 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 13:23:33,062 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 13:23:33,062 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 13:23:33,062 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 13:23:33,062 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 13:23:33,349 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 13:23:33,372 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 13:23:33,374 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 13:23:33,375 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 13:23:33,376 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 13:23:33,377 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/parallel-misc-4.wvr.c [2023-08-26 13:23:34,466 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 13:23:34,687 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 13:23:34,687 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/parallel-misc-4.wvr.c [2023-08-26 13:23:34,694 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1242fde9/9f1b3959d3cb4c2f9fb213a7a1b704c6/FLAGa470c0675 [2023-08-26 13:23:34,703 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1242fde9/9f1b3959d3cb4c2f9fb213a7a1b704c6 [2023-08-26 13:23:34,705 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 13:23:34,706 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 13:23:34,707 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 13:23:34,707 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 13:23:34,709 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 13:23:34,710 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 01:23:34" (1/1) ... [2023-08-26 13:23:34,711 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e80c585 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:23:34, skipping insertion in model container [2023-08-26 13:23:34,711 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 01:23:34" (1/1) ... [2023-08-26 13:23:34,730 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 13:23:34,886 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 13:23:34,895 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 13:23:34,930 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 13:23:34,940 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 13:23:34,940 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 13:23:34,946 INFO L206 MainTranslator]: Completed translation [2023-08-26 13:23:34,947 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:23:34 WrapperNode [2023-08-26 13:23:34,947 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 13:23:34,949 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 13:23:34,949 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 13:23:34,949 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 13:23:34,955 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:23:34" (1/1) ... [2023-08-26 13:23:34,970 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:23:34" (1/1) ... [2023-08-26 13:23:34,995 INFO L138 Inliner]: procedures = 22, calls = 44, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 77 [2023-08-26 13:23:34,996 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 13:23:34,997 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 13:23:34,997 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 13:23:34,997 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 13:23:35,005 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:23:34" (1/1) ... [2023-08-26 13:23:35,005 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:23:34" (1/1) ... [2023-08-26 13:23:35,019 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:23:34" (1/1) ... [2023-08-26 13:23:35,020 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:23:34" (1/1) ... [2023-08-26 13:23:35,023 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:23:34" (1/1) ... [2023-08-26 13:23:35,026 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:23:34" (1/1) ... [2023-08-26 13:23:35,027 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:23:34" (1/1) ... [2023-08-26 13:23:35,028 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:23:34" (1/1) ... [2023-08-26 13:23:35,030 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 13:23:35,031 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 13:23:35,031 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 13:23:35,031 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 13:23:35,031 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:23:34" (1/1) ... [2023-08-26 13:23:35,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 13:23:35,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:23:35,074 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-26 13:23:35,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-26 13:23:35,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 13:23:35,114 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 13:23:35,114 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 13:23:35,114 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-26 13:23:35,115 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-26 13:23:35,115 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-26 13:23:35,115 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-26 13:23:35,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 13:23:35,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 13:23:35,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 13:23:35,116 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 13:23:35,116 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 13:23:35,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 13:23:35,116 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 13:23:35,116 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 13:23:35,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 13:23:35,117 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 13:23:35,215 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 13:23:35,218 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 13:23:35,457 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 13:23:35,475 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 13:23:35,476 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-26 13:23:35,478 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:23:35 BoogieIcfgContainer [2023-08-26 13:23:35,478 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 13:23:35,480 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 13:23:35,480 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 13:23:35,482 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 13:23:35,482 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 01:23:34" (1/3) ... [2023-08-26 13:23:35,483 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5146944a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 01:23:35, skipping insertion in model container [2023-08-26 13:23:35,483 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 01:23:34" (2/3) ... [2023-08-26 13:23:35,485 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5146944a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 01:23:35, skipping insertion in model container [2023-08-26 13:23:35,485 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 01:23:35" (3/3) ... [2023-08-26 13:23:35,486 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-misc-4.wvr.c [2023-08-26 13:23:35,499 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 13:23:35,499 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 13 error locations. [2023-08-26 13:23:35,500 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 13:23:35,563 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-26 13:23:35,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 120 places, 117 transitions, 258 flow [2023-08-26 13:23:35,637 INFO L124 PetriNetUnfolderBase]: 7/114 cut-off events. [2023-08-26 13:23:35,637 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 13:23:35,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 114 events. 7/114 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 116 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 84. Up to 2 conditions per place. [2023-08-26 13:23:35,642 INFO L82 GeneralOperation]: Start removeDead. Operand has 120 places, 117 transitions, 258 flow [2023-08-26 13:23:35,647 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 106 places, 103 transitions, 224 flow [2023-08-26 13:23:35,650 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 13:23:35,663 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 106 places, 103 transitions, 224 flow [2023-08-26 13:23:35,670 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 106 places, 103 transitions, 224 flow [2023-08-26 13:23:35,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 103 transitions, 224 flow [2023-08-26 13:23:35,715 INFO L124 PetriNetUnfolderBase]: 7/103 cut-off events. [2023-08-26 13:23:35,716 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 13:23:35,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 103 events. 7/103 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 114 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 84. Up to 2 conditions per place. [2023-08-26 13:23:35,718 INFO L119 LiptonReduction]: Number of co-enabled transitions 1458 [2023-08-26 13:23:39,246 INFO L134 LiptonReduction]: Checked pairs total: 2027 [2023-08-26 13:23:39,247 INFO L136 LiptonReduction]: Total number of compositions: 99 [2023-08-26 13:23:39,259 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 13:23:39,264 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;@322e5a56, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 13:23:39,264 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2023-08-26 13:23:39,266 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 13:23:39,266 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 13:23:39,266 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:23:39,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:23:39,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 13:23:39,267 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:23:39,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:23:39,271 INFO L85 PathProgramCache]: Analyzing trace with hash 433, now seen corresponding path program 1 times [2023-08-26 13:23:39,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:23:39,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173619216] [2023-08-26 13:23:39,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:23:39,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:23:39,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:23:39,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:23:39,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:23:39,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173619216] [2023-08-26 13:23:39,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173619216] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:23:39,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:23:39,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 13:23:39,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368289047] [2023-08-26 13:23:39,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:23:39,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 13:23:39,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:23:39,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 13:23:39,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 13:23:39,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 216 [2023-08-26 13:23:39,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 34 transitions, 86 flow. Second operand has 2 states, 2 states have (on average 105.5) internal successors, (211), 2 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:39,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:23:39,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 216 [2023-08-26 13:23:39,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:23:39,543 INFO L124 PetriNetUnfolderBase]: 356/556 cut-off events. [2023-08-26 13:23:39,543 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-08-26 13:23:39,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1155 conditions, 556 events. 356/556 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2383 event pairs, 270 based on Foata normal form. 0/319 useless extension candidates. Maximal degree in co-relation 929. Up to 552 conditions per place. [2023-08-26 13:23:39,553 INFO L140 encePairwiseOnDemand]: 214/216 looper letters, 29 selfloop transitions, 0 changer transitions 0/32 dead transitions. [2023-08-26 13:23:39,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 32 transitions, 140 flow [2023-08-26 13:23:39,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 13:23:39,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 13:23:39,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 241 transitions. [2023-08-26 13:23:39,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578703703703703 [2023-08-26 13:23:39,568 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 241 transitions. [2023-08-26 13:23:39,569 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 241 transitions. [2023-08-26 13:23:39,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:23:39,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 241 transitions. [2023-08-26 13:23:39,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 120.5) internal successors, (241), 2 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:39,581 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:39,581 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:39,583 INFO L175 Difference]: Start difference. First operand has 42 places, 34 transitions, 86 flow. Second operand 2 states and 241 transitions. [2023-08-26 13:23:39,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 32 transitions, 140 flow [2023-08-26 13:23:39,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 32 transitions, 128 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-26 13:23:39,589 INFO L231 Difference]: Finished difference. Result has 35 places, 32 transitions, 70 flow [2023-08-26 13:23:39,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=70, PETRI_PLACES=35, PETRI_TRANSITIONS=32} [2023-08-26 13:23:39,593 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -7 predicate places. [2023-08-26 13:23:39,593 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 32 transitions, 70 flow [2023-08-26 13:23:39,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 105.5) internal successors, (211), 2 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:39,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:23:39,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 13:23:39,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 13:23:39,596 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:23:39,603 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:23:39,603 INFO L85 PathProgramCache]: Analyzing trace with hash 424741, now seen corresponding path program 1 times [2023-08-26 13:23:39,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:23:39,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307168848] [2023-08-26 13:23:39,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:23:39,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:23:39,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:23:39,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:23:39,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:23:39,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307168848] [2023-08-26 13:23:39,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307168848] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:23:39,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:23:39,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:23:39,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185992088] [2023-08-26 13:23:39,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:23:39,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:23:39,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:23:39,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:23:39,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:23:39,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 216 [2023-08-26 13:23:39,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 32 transitions, 70 flow. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:39,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:23:39,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 216 [2023-08-26 13:23:39,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:23:39,993 INFO L124 PetriNetUnfolderBase]: 340/529 cut-off events. [2023-08-26 13:23:39,993 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-26 13:23:39,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1072 conditions, 529 events. 340/529 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2278 event pairs, 258 based on Foata normal form. 0/308 useless extension candidates. Maximal degree in co-relation 1069. Up to 524 conditions per place. [2023-08-26 13:23:39,996 INFO L140 encePairwiseOnDemand]: 213/216 looper letters, 26 selfloop transitions, 1 changer transitions 0/30 dead transitions. [2023-08-26 13:23:39,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 30 transitions, 120 flow [2023-08-26 13:23:39,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:23:39,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:23:39,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 278 transitions. [2023-08-26 13:23:39,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42901234567901236 [2023-08-26 13:23:39,999 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 278 transitions. [2023-08-26 13:23:39,999 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 278 transitions. [2023-08-26 13:23:39,999 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:23:40,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 278 transitions. [2023-08-26 13:23:40,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:40,002 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:40,003 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:40,003 INFO L175 Difference]: Start difference. First operand has 35 places, 32 transitions, 70 flow. Second operand 3 states and 278 transitions. [2023-08-26 13:23:40,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 30 transitions, 120 flow [2023-08-26 13:23:40,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 30 transitions, 120 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 13:23:40,004 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 68 flow [2023-08-26 13:23:40,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2023-08-26 13:23:40,005 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -7 predicate places. [2023-08-26 13:23:40,005 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 68 flow [2023-08-26 13:23:40,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:40,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:23:40,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 13:23:40,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 13:23:40,006 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:23:40,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:23:40,006 INFO L85 PathProgramCache]: Analyzing trace with hash 424740, now seen corresponding path program 1 times [2023-08-26 13:23:40,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:23:40,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484733254] [2023-08-26 13:23:40,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:23:40,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:23:40,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:23:40,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:23:40,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:23:40,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484733254] [2023-08-26 13:23:40,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484733254] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:23:40,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:23:40,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:23:40,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850896317] [2023-08-26 13:23:40,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:23:40,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:23:40,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:23:40,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:23:40,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:23:40,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 216 [2023-08-26 13:23:40,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 68 flow. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:40,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:23:40,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 216 [2023-08-26 13:23:40,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:23:40,142 INFO L124 PetriNetUnfolderBase]: 324/502 cut-off events. [2023-08-26 13:23:40,143 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-26 13:23:40,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1020 conditions, 502 events. 324/502 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2140 event pairs, 246 based on Foata normal form. 0/297 useless extension candidates. Maximal degree in co-relation 1016. Up to 497 conditions per place. [2023-08-26 13:23:40,146 INFO L140 encePairwiseOnDemand]: 213/216 looper letters, 24 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-08-26 13:23:40,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 28 transitions, 114 flow [2023-08-26 13:23:40,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:23:40,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:23:40,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 267 transitions. [2023-08-26 13:23:40,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41203703703703703 [2023-08-26 13:23:40,148 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 267 transitions. [2023-08-26 13:23:40,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 267 transitions. [2023-08-26 13:23:40,149 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:23:40,149 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 267 transitions. [2023-08-26 13:23:40,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 89.0) internal successors, (267), 3 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:40,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:40,152 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:40,152 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 68 flow. Second operand 3 states and 267 transitions. [2023-08-26 13:23:40,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 28 transitions, 114 flow [2023-08-26 13:23:40,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 28 transitions, 113 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:23:40,153 INFO L231 Difference]: Finished difference. Result has 34 places, 28 transitions, 65 flow [2023-08-26 13:23:40,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=34, PETRI_TRANSITIONS=28} [2023-08-26 13:23:40,154 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -8 predicate places. [2023-08-26 13:23:40,154 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 28 transitions, 65 flow [2023-08-26 13:23:40,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 3 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:40,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:23:40,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 13:23:40,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 13:23:40,155 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:23:40,155 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:23:40,155 INFO L85 PathProgramCache]: Analyzing trace with hash 408186781, now seen corresponding path program 1 times [2023-08-26 13:23:40,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:23:40,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911625030] [2023-08-26 13:23:40,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:23:40,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:23:40,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:23:40,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:23:40,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:23:40,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911625030] [2023-08-26 13:23:40,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911625030] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:23:40,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:23:40,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:23:40,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098521259] [2023-08-26 13:23:40,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:23:40,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:23:40,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:23:40,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:23:40,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:23:40,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 216 [2023-08-26 13:23:40,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:40,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:23:40,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 216 [2023-08-26 13:23:40,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:23:40,267 INFO L124 PetriNetUnfolderBase]: 303/467 cut-off events. [2023-08-26 13:23:40,267 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-26 13:23:40,268 INFO L83 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 467 events. 303/467 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 1912 event pairs, 231 based on Foata normal form. 0/286 useless extension candidates. Maximal degree in co-relation 947. Up to 462 conditions per place. [2023-08-26 13:23:40,270 INFO L140 encePairwiseOnDemand]: 213/216 looper letters, 22 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2023-08-26 13:23:40,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 26 transitions, 107 flow [2023-08-26 13:23:40,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:23:40,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:23:40,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 265 transitions. [2023-08-26 13:23:40,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4089506172839506 [2023-08-26 13:23:40,272 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 265 transitions. [2023-08-26 13:23:40,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 265 transitions. [2023-08-26 13:23:40,273 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:23:40,273 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 265 transitions. [2023-08-26 13:23:40,274 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:40,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:40,276 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:40,276 INFO L175 Difference]: Start difference. First operand has 34 places, 28 transitions, 65 flow. Second operand 3 states and 265 transitions. [2023-08-26 13:23:40,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 26 transitions, 107 flow [2023-08-26 13:23:40,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 26 transitions, 106 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:23:40,277 INFO L231 Difference]: Finished difference. Result has 33 places, 26 transitions, 62 flow [2023-08-26 13:23:40,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=62, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2023-08-26 13:23:40,279 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -9 predicate places. [2023-08-26 13:23:40,279 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 62 flow [2023-08-26 13:23:40,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:40,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:23:40,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 13:23:40,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 13:23:40,280 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:23:40,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:23:40,280 INFO L85 PathProgramCache]: Analyzing trace with hash 408186780, now seen corresponding path program 1 times [2023-08-26 13:23:40,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:23:40,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964256794] [2023-08-26 13:23:40,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:23:40,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:23:40,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:23:40,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:23:40,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:23:40,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964256794] [2023-08-26 13:23:40,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964256794] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:23:40,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:23:40,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 13:23:40,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893757822] [2023-08-26 13:23:40,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:23:40,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 13:23:40,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:23:40,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 13:23:40,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 13:23:40,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 216 [2023-08-26 13:23:40,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 62 flow. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:40,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:23:40,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 216 [2023-08-26 13:23:40,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:23:40,427 INFO L124 PetriNetUnfolderBase]: 282/432 cut-off events. [2023-08-26 13:23:40,428 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-26 13:23:40,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 882 conditions, 432 events. 282/432 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 1703 event pairs, 216 based on Foata normal form. 0/275 useless extension candidates. Maximal degree in co-relation 878. Up to 427 conditions per place. [2023-08-26 13:23:40,432 INFO L140 encePairwiseOnDemand]: 213/216 looper letters, 20 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2023-08-26 13:23:40,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 24 transitions, 100 flow [2023-08-26 13:23:40,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:23:40,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:23:40,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 272 transitions. [2023-08-26 13:23:40,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41975308641975306 [2023-08-26 13:23:40,433 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 272 transitions. [2023-08-26 13:23:40,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 272 transitions. [2023-08-26 13:23:40,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:23:40,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 272 transitions. [2023-08-26 13:23:40,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:40,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:40,436 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:40,437 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 62 flow. Second operand 3 states and 272 transitions. [2023-08-26 13:23:40,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 24 transitions, 100 flow [2023-08-26 13:23:40,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 24 transitions, 99 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:23:40,438 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 59 flow [2023-08-26 13:23:40,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2023-08-26 13:23:40,441 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -10 predicate places. [2023-08-26 13:23:40,441 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 59 flow [2023-08-26 13:23:40,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:40,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:23:40,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:23:40,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 13:23:40,442 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:23:40,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:23:40,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1425483210, now seen corresponding path program 1 times [2023-08-26 13:23:40,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:23:40,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218060133] [2023-08-26 13:23:40,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:23:40,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:23:40,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:23:40,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:23:40,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:23:40,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218060133] [2023-08-26 13:23:40,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218060133] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:23:40,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:23:40,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 13:23:40,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179570181] [2023-08-26 13:23:40,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:23:40,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 13:23:40,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:23:40,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 13:23:40,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 13:23:40,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 216 [2023-08-26 13:23:40,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 59 flow. Second operand has 4 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 13:23:40,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:23:40,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 216 [2023-08-26 13:23:40,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:23:40,679 INFO L124 PetriNetUnfolderBase]: 224/350 cut-off events. [2023-08-26 13:23:40,679 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-26 13:23:40,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 719 conditions, 350 events. 224/350 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1321 event pairs, 170 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 715. Up to 345 conditions per place. [2023-08-26 13:23:40,681 INFO L140 encePairwiseOnDemand]: 214/216 looper letters, 19 selfloop transitions, 1 changer transitions 0/23 dead transitions. [2023-08-26 13:23:40,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 23 transitions, 97 flow [2023-08-26 13:23:40,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:23:40,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:23:40,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 258 transitions. [2023-08-26 13:23:40,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39814814814814814 [2023-08-26 13:23:40,683 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 258 transitions. [2023-08-26 13:23:40,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 258 transitions. [2023-08-26 13:23:40,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:23:40,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 258 transitions. [2023-08-26 13:23:40,686 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:40,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:40,688 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:40,688 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 59 flow. Second operand 3 states and 258 transitions. [2023-08-26 13:23:40,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 23 transitions, 97 flow [2023-08-26 13:23:40,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 23 transitions, 96 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:23:40,689 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 58 flow [2023-08-26 13:23:40,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2023-08-26 13:23:40,692 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -10 predicate places. [2023-08-26 13:23:40,694 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 58 flow [2023-08-26 13:23:40,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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 13:23:40,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:23:40,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:23:40,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 13:23:40,695 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:23:40,696 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:23:40,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1425483209, now seen corresponding path program 1 times [2023-08-26 13:23:40,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:23:40,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240508728] [2023-08-26 13:23:40,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:23:40,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:23:40,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:23:40,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:23:40,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:23:40,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240508728] [2023-08-26 13:23:40,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240508728] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:23:40,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:23:40,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 13:23:40,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559476733] [2023-08-26 13:23:40,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:23:40,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:23:40,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:23:40,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:23:40,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:23:40,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 216 [2023-08-26 13:23:40,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 23 transitions, 58 flow. Second operand has 5 states, 5 states have (on average 75.4) internal successors, (377), 5 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:40,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:23:40,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 216 [2023-08-26 13:23:40,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:23:40,857 INFO L124 PetriNetUnfolderBase]: 166/268 cut-off events. [2023-08-26 13:23:40,857 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-26 13:23:40,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 556 conditions, 268 events. 166/268 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 946 event pairs, 124 based on Foata normal form. 0/199 useless extension candidates. Maximal degree in co-relation 552. Up to 263 conditions per place. [2023-08-26 13:23:40,859 INFO L140 encePairwiseOnDemand]: 214/216 looper letters, 18 selfloop transitions, 1 changer transitions 0/22 dead transitions. [2023-08-26 13:23:40,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 22 transitions, 94 flow [2023-08-26 13:23:40,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 13:23:40,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 13:23:40,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 242 transitions. [2023-08-26 13:23:40,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3734567901234568 [2023-08-26 13:23:40,860 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 242 transitions. [2023-08-26 13:23:40,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 242 transitions. [2023-08-26 13:23:40,860 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:23:40,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 242 transitions. [2023-08-26 13:23:40,861 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:40,862 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:40,863 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 216.0) internal successors, (864), 4 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:40,863 INFO L175 Difference]: Start difference. First operand has 32 places, 23 transitions, 58 flow. Second operand 3 states and 242 transitions. [2023-08-26 13:23:40,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 22 transitions, 94 flow [2023-08-26 13:23:40,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 22 transitions, 93 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:23:40,864 INFO L231 Difference]: Finished difference. Result has 32 places, 22 transitions, 57 flow [2023-08-26 13:23:40,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=32, PETRI_TRANSITIONS=22} [2023-08-26 13:23:40,864 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -10 predicate places. [2023-08-26 13:23:40,865 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 22 transitions, 57 flow [2023-08-26 13:23:40,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 75.4) internal successors, (377), 5 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:40,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:23:40,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:23:40,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 13:23:40,865 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:23:40,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:23:40,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1976014661, now seen corresponding path program 1 times [2023-08-26 13:23:40,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:23:40,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627695984] [2023-08-26 13:23:40,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:23:40,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:23:40,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:23:40,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:23:40,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:23:40,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627695984] [2023-08-26 13:23:40,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627695984] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:23:40,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:23:40,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 13:23:40,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509707111] [2023-08-26 13:23:40,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:23:40,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 13:23:40,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:23:40,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 13:23:40,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 13:23:40,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 216 [2023-08-26 13:23:40,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 22 transitions, 57 flow. Second operand has 4 states, 4 states have (on average 99.5) internal successors, (398), 4 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:40,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:23:40,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 216 [2023-08-26 13:23:40,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:23:41,088 INFO L124 PetriNetUnfolderBase]: 171/270 cut-off events. [2023-08-26 13:23:41,088 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 13:23:41,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 566 conditions, 270 events. 171/270 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 783 event pairs, 9 based on Foata normal form. 0/240 useless extension candidates. Maximal degree in co-relation 562. Up to 125 conditions per place. [2023-08-26 13:23:41,090 INFO L140 encePairwiseOnDemand]: 212/216 looper letters, 36 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2023-08-26 13:23:41,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 40 transitions, 175 flow [2023-08-26 13:23:41,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 13:23:41,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 13:23:41,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 421 transitions. [2023-08-26 13:23:41,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48726851851851855 [2023-08-26 13:23:41,092 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 421 transitions. [2023-08-26 13:23:41,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 421 transitions. [2023-08-26 13:23:41,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:23:41,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 421 transitions. [2023-08-26 13:23:41,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 105.25) internal successors, (421), 4 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:41,094 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:41,094 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:41,095 INFO L175 Difference]: Start difference. First operand has 32 places, 22 transitions, 57 flow. Second operand 4 states and 421 transitions. [2023-08-26 13:23:41,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 40 transitions, 175 flow [2023-08-26 13:23:41,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 40 transitions, 171 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 13:23:41,096 INFO L231 Difference]: Finished difference. Result has 35 places, 24 transitions, 74 flow [2023-08-26 13:23:41,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=74, PETRI_PLACES=35, PETRI_TRANSITIONS=24} [2023-08-26 13:23:41,097 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -7 predicate places. [2023-08-26 13:23:41,097 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 24 transitions, 74 flow [2023-08-26 13:23:41,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 99.5) internal successors, (398), 4 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:41,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:23:41,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:23:41,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 13:23:41,097 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:23:41,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:23:41,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1103793643, now seen corresponding path program 2 times [2023-08-26 13:23:41,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:23:41,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786044576] [2023-08-26 13:23:41,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:23:41,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:23:41,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:23:41,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:23:41,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:23:41,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786044576] [2023-08-26 13:23:41,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786044576] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:23:41,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:23:41,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 13:23:41,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936121144] [2023-08-26 13:23:41,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:23:41,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 13:23:41,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:23:41,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 13:23:41,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 13:23:41,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 216 [2023-08-26 13:23:41,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 24 transitions, 74 flow. Second operand has 4 states, 4 states have (on average 99.5) internal successors, (398), 4 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:41,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:23:41,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 216 [2023-08-26 13:23:41,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:23:41,321 INFO L124 PetriNetUnfolderBase]: 144/231 cut-off events. [2023-08-26 13:23:41,321 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2023-08-26 13:23:41,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 550 conditions, 231 events. 144/231 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 581 event pairs, 14 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 544. Up to 119 conditions per place. [2023-08-26 13:23:41,323 INFO L140 encePairwiseOnDemand]: 212/216 looper letters, 32 selfloop transitions, 6 changer transitions 0/38 dead transitions. [2023-08-26 13:23:41,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 38 transitions, 187 flow [2023-08-26 13:23:41,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 13:23:41,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 13:23:41,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 417 transitions. [2023-08-26 13:23:41,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4826388888888889 [2023-08-26 13:23:41,325 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 417 transitions. [2023-08-26 13:23:41,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 417 transitions. [2023-08-26 13:23:41,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:23:41,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 417 transitions. [2023-08-26 13:23:41,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 104.25) internal successors, (417), 4 states have internal predecessors, (417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:41,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:41,327 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 216.0) internal successors, (1080), 5 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:41,328 INFO L175 Difference]: Start difference. First operand has 35 places, 24 transitions, 74 flow. Second operand 4 states and 417 transitions. [2023-08-26 13:23:41,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 38 transitions, 187 flow [2023-08-26 13:23:41,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 38 transitions, 182 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:23:41,329 INFO L231 Difference]: Finished difference. Result has 39 places, 27 transitions, 102 flow [2023-08-26 13:23:41,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=102, PETRI_PLACES=39, PETRI_TRANSITIONS=27} [2023-08-26 13:23:41,330 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, -3 predicate places. [2023-08-26 13:23:41,330 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 27 transitions, 102 flow [2023-08-26 13:23:41,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 99.5) internal successors, (398), 4 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:41,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:23:41,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:23:41,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 13:23:41,331 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:23:41,331 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:23:41,331 INFO L85 PathProgramCache]: Analyzing trace with hash 1825273673, now seen corresponding path program 3 times [2023-08-26 13:23:41,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:23:41,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833001562] [2023-08-26 13:23:41,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:23:41,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:23:41,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:23:41,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:23:41,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:23:41,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833001562] [2023-08-26 13:23:41,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833001562] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:23:41,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:23:41,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 13:23:41,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377692358] [2023-08-26 13:23:41,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:23:41,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:23:41,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:23:41,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:23:41,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:23:41,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 216 [2023-08-26 13:23:41,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 27 transitions, 102 flow. Second operand has 5 states, 5 states have (on average 98.6) internal successors, (493), 5 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:41,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:23:41,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 216 [2023-08-26 13:23:41,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:23:41,556 INFO L124 PetriNetUnfolderBase]: 156/251 cut-off events. [2023-08-26 13:23:41,556 INFO L125 PetriNetUnfolderBase]: For 130/130 co-relation queries the response was YES. [2023-08-26 13:23:41,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 659 conditions, 251 events. 156/251 cut-off events. For 130/130 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 699 event pairs, 12 based on Foata normal form. 8/259 useless extension candidates. Maximal degree in co-relation 651. Up to 88 conditions per place. [2023-08-26 13:23:41,558 INFO L140 encePairwiseOnDemand]: 210/216 looper letters, 38 selfloop transitions, 8 changer transitions 0/46 dead transitions. [2023-08-26 13:23:41,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 46 transitions, 242 flow [2023-08-26 13:23:41,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 13:23:41,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 13:23:41,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 520 transitions. [2023-08-26 13:23:41,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2023-08-26 13:23:41,560 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 520 transitions. [2023-08-26 13:23:41,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 520 transitions. [2023-08-26 13:23:41,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:23:41,561 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 520 transitions. [2023-08-26 13:23:41,562 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 104.0) internal successors, (520), 5 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:41,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 216.0) internal successors, (1296), 6 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 13:23:41,563 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 216.0) internal successors, (1296), 6 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 13:23:41,564 INFO L175 Difference]: Start difference. First operand has 39 places, 27 transitions, 102 flow. Second operand 5 states and 520 transitions. [2023-08-26 13:23:41,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 46 transitions, 242 flow [2023-08-26 13:23:41,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 46 transitions, 237 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 13:23:41,565 INFO L231 Difference]: Finished difference. Result has 44 places, 29 transitions, 132 flow [2023-08-26 13:23:41,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=97, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=132, PETRI_PLACES=44, PETRI_TRANSITIONS=29} [2023-08-26 13:23:41,566 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 2 predicate places. [2023-08-26 13:23:41,566 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 29 transitions, 132 flow [2023-08-26 13:23:41,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 98.6) internal successors, (493), 5 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:41,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:23:41,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:23:41,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 13:23:41,567 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:23:41,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:23:41,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1368938013, now seen corresponding path program 4 times [2023-08-26 13:23:41,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:23:41,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36156651] [2023-08-26 13:23:41,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:23:41,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:23:41,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:23:41,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:23:41,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:23:41,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36156651] [2023-08-26 13:23:41,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36156651] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:23:41,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:23:41,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 13:23:41,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540550178] [2023-08-26 13:23:41,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:23:41,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:23:41,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:23:41,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:23:41,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:23:41,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 216 [2023-08-26 13:23:41,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 29 transitions, 132 flow. Second operand has 5 states, 5 states have (on average 94.6) internal successors, (473), 5 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:41,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:23:41,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 216 [2023-08-26 13:23:41,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:23:41,921 INFO L124 PetriNetUnfolderBase]: 263/424 cut-off events. [2023-08-26 13:23:41,921 INFO L125 PetriNetUnfolderBase]: For 496/496 co-relation queries the response was YES. [2023-08-26 13:23:41,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1252 conditions, 424 events. 263/424 cut-off events. For 496/496 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1393 event pairs, 25 based on Foata normal form. 14/438 useless extension candidates. Maximal degree in co-relation 1243. Up to 246 conditions per place. [2023-08-26 13:23:41,924 INFO L140 encePairwiseOnDemand]: 209/216 looper letters, 34 selfloop transitions, 3 changer transitions 30/67 dead transitions. [2023-08-26 13:23:41,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 67 transitions, 414 flow [2023-08-26 13:23:41,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 13:23:41,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 13:23:41,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 697 transitions. [2023-08-26 13:23:41,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.460978835978836 [2023-08-26 13:23:41,927 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 697 transitions. [2023-08-26 13:23:41,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 697 transitions. [2023-08-26 13:23:41,927 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:23:41,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 697 transitions. [2023-08-26 13:23:41,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 99.57142857142857) internal successors, (697), 7 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:41,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 216.0) internal successors, (1728), 8 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:41,932 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 216.0) internal successors, (1728), 8 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:41,932 INFO L175 Difference]: Start difference. First operand has 44 places, 29 transitions, 132 flow. Second operand 7 states and 697 transitions. [2023-08-26 13:23:41,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 67 transitions, 414 flow [2023-08-26 13:23:41,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 67 transitions, 402 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 13:23:41,938 INFO L231 Difference]: Finished difference. Result has 53 places, 30 transitions, 161 flow [2023-08-26 13:23:41,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=161, PETRI_PLACES=53, PETRI_TRANSITIONS=30} [2023-08-26 13:23:41,940 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2023-08-26 13:23:41,940 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 30 transitions, 161 flow [2023-08-26 13:23:41,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 94.6) internal successors, (473), 5 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:41,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:23:41,940 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:23:41,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 13:23:41,941 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:23:41,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:23:41,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1314524068, now seen corresponding path program 1 times [2023-08-26 13:23:41,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:23:41,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131828503] [2023-08-26 13:23:41,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:23:41,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:23:41,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:23:42,126 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 13:23:42,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:23:42,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131828503] [2023-08-26 13:23:42,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131828503] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:23:42,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:23:42,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 13:23:42,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447180747] [2023-08-26 13:23:42,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:23:42,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:23:42,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:23:42,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:23:42,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:23:42,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 216 [2023-08-26 13:23:42,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 30 transitions, 161 flow. Second operand has 5 states, 5 states have (on average 97.0) internal successors, (485), 5 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:42,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:23:42,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 216 [2023-08-26 13:23:42,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:23:42,408 INFO L124 PetriNetUnfolderBase]: 326/529 cut-off events. [2023-08-26 13:23:42,408 INFO L125 PetriNetUnfolderBase]: For 1045/1045 co-relation queries the response was YES. [2023-08-26 13:23:42,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2002 conditions, 529 events. 326/529 cut-off events. For 1045/1045 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1836 event pairs, 14 based on Foata normal form. 16/545 useless extension candidates. Maximal degree in co-relation 1987. Up to 169 conditions per place. [2023-08-26 13:23:42,413 INFO L140 encePairwiseOnDemand]: 207/216 looper letters, 67 selfloop transitions, 36 changer transitions 0/103 dead transitions. [2023-08-26 13:23:42,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 103 transitions, 758 flow [2023-08-26 13:23:42,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 13:23:42,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 13:23:42,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 926 transitions. [2023-08-26 13:23:42,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4763374485596708 [2023-08-26 13:23:42,416 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 926 transitions. [2023-08-26 13:23:42,417 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 926 transitions. [2023-08-26 13:23:42,417 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:23:42,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 926 transitions. [2023-08-26 13:23:42,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 102.88888888888889) internal successors, (926), 9 states have internal predecessors, (926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:42,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 216.0) internal successors, (2160), 10 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:42,424 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 216.0) internal successors, (2160), 10 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:42,424 INFO L175 Difference]: Start difference. First operand has 53 places, 30 transitions, 161 flow. Second operand 9 states and 926 transitions. [2023-08-26 13:23:42,424 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 103 transitions, 758 flow [2023-08-26 13:23:42,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 103 transitions, 720 flow, removed 16 selfloop flow, removed 3 redundant places. [2023-08-26 13:23:42,432 INFO L231 Difference]: Finished difference. Result has 62 places, 61 transitions, 523 flow [2023-08-26 13:23:42,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=523, PETRI_PLACES=62, PETRI_TRANSITIONS=61} [2023-08-26 13:23:42,433 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2023-08-26 13:23:42,433 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 61 transitions, 523 flow [2023-08-26 13:23:42,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 97.0) internal successors, (485), 5 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:42,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:23:42,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:23:42,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 13:23:42,434 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:23:42,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:23:42,434 INFO L85 PathProgramCache]: Analyzing trace with hash -935879266, now seen corresponding path program 2 times [2023-08-26 13:23:42,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:23:42,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620563335] [2023-08-26 13:23:42,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:23:42,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:23:42,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:23:42,597 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 13:23:42,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:23:42,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620563335] [2023-08-26 13:23:42,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620563335] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:23:42,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:23:42,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 13:23:42,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803638286] [2023-08-26 13:23:42,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:23:42,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:23:42,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:23:42,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:23:42,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:23:42,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 216 [2023-08-26 13:23:42,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 523 flow. Second operand has 5 states, 5 states have (on average 97.0) internal successors, (485), 5 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:42,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:23:42,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 216 [2023-08-26 13:23:42,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:23:42,880 INFO L124 PetriNetUnfolderBase]: 474/831 cut-off events. [2023-08-26 13:23:42,880 INFO L125 PetriNetUnfolderBase]: For 4561/4561 co-relation queries the response was YES. [2023-08-26 13:23:42,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4249 conditions, 831 events. 474/831 cut-off events. For 4561/4561 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 3433 event pairs, 39 based on Foata normal form. 20/851 useless extension candidates. Maximal degree in co-relation 4229. Up to 257 conditions per place. [2023-08-26 13:23:42,888 INFO L140 encePairwiseOnDemand]: 207/216 looper letters, 101 selfloop transitions, 63 changer transitions 0/164 dead transitions. [2023-08-26 13:23:42,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 164 transitions, 1624 flow [2023-08-26 13:23:42,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 13:23:42,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 13:23:42,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 940 transitions. [2023-08-26 13:23:42,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4835390946502058 [2023-08-26 13:23:42,891 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 940 transitions. [2023-08-26 13:23:42,892 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 940 transitions. [2023-08-26 13:23:42,892 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:23:42,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 940 transitions. [2023-08-26 13:23:42,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 104.44444444444444) internal successors, (940), 9 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:42,896 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 216.0) internal successors, (2160), 10 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:42,897 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 216.0) internal successors, (2160), 10 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:42,897 INFO L175 Difference]: Start difference. First operand has 62 places, 61 transitions, 523 flow. Second operand 9 states and 940 transitions. [2023-08-26 13:23:42,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 164 transitions, 1624 flow [2023-08-26 13:23:42,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 164 transitions, 1592 flow, removed 16 selfloop flow, removed 0 redundant places. [2023-08-26 13:23:42,917 INFO L231 Difference]: Finished difference. Result has 78 places, 103 transitions, 1255 flow [2023-08-26 13:23:42,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=505, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1255, PETRI_PLACES=78, PETRI_TRANSITIONS=103} [2023-08-26 13:23:42,918 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 36 predicate places. [2023-08-26 13:23:42,918 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 103 transitions, 1255 flow [2023-08-26 13:23:42,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 97.0) internal successors, (485), 5 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:42,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:23:42,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:23:42,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 13:23:42,919 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:23:42,919 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:23:42,919 INFO L85 PathProgramCache]: Analyzing trace with hash 646745468, now seen corresponding path program 3 times [2023-08-26 13:23:42,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:23:42,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740555520] [2023-08-26 13:23:42,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:23:42,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:23:42,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:23:43,072 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 13:23:43,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:23:43,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740555520] [2023-08-26 13:23:43,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740555520] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:23:43,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:23:43,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 13:23:43,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176457797] [2023-08-26 13:23:43,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:23:43,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 13:23:43,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:23:43,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 13:23:43,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 13:23:43,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 216 [2023-08-26 13:23:43,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 103 transitions, 1255 flow. Second operand has 5 states, 5 states have (on average 97.0) internal successors, (485), 5 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:43,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:23:43,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 216 [2023-08-26 13:23:43,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:23:43,387 INFO L124 PetriNetUnfolderBase]: 553/944 cut-off events. [2023-08-26 13:23:43,388 INFO L125 PetriNetUnfolderBase]: For 9183/9183 co-relation queries the response was YES. [2023-08-26 13:23:43,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5943 conditions, 944 events. 553/944 cut-off events. For 9183/9183 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3917 event pairs, 4 based on Foata normal form. 36/980 useless extension candidates. Maximal degree in co-relation 5915. Up to 458 conditions per place. [2023-08-26 13:23:43,396 INFO L140 encePairwiseOnDemand]: 207/216 looper letters, 100 selfloop transitions, 42 changer transitions 40/182 dead transitions. [2023-08-26 13:23:43,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 182 transitions, 2467 flow [2023-08-26 13:23:43,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 13:23:43,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 13:23:43,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 916 transitions. [2023-08-26 13:23:43,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4711934156378601 [2023-08-26 13:23:43,398 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 916 transitions. [2023-08-26 13:23:43,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 916 transitions. [2023-08-26 13:23:43,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:23:43,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 916 transitions. [2023-08-26 13:23:43,401 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 101.77777777777777) internal successors, (916), 9 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:43,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 216.0) internal successors, (2160), 10 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:43,404 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 216.0) internal successors, (2160), 10 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:43,404 INFO L175 Difference]: Start difference. First operand has 78 places, 103 transitions, 1255 flow. Second operand 9 states and 916 transitions. [2023-08-26 13:23:43,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 182 transitions, 2467 flow [2023-08-26 13:23:43,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 182 transitions, 2343 flow, removed 62 selfloop flow, removed 0 redundant places. [2023-08-26 13:23:43,456 INFO L231 Difference]: Finished difference. Result has 92 places, 107 transitions, 1435 flow [2023-08-26 13:23:43,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=1193, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1435, PETRI_PLACES=92, PETRI_TRANSITIONS=107} [2023-08-26 13:23:43,456 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2023-08-26 13:23:43,456 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 107 transitions, 1435 flow [2023-08-26 13:23:43,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 97.0) internal successors, (485), 5 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:43,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:23:43,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:23:43,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 13:23:43,457 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:23:43,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:23:43,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1721977086, now seen corresponding path program 4 times [2023-08-26 13:23:43,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:23:43,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481874286] [2023-08-26 13:23:43,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:23:43,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:23:43,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:23:43,610 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 13:23:43,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:23:43,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481874286] [2023-08-26 13:23:43,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481874286] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 13:23:43,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 13:23:43,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 13:23:43,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345601183] [2023-08-26 13:23:43,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 13:23:43,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 13:23:43,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:23:43,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 13:23:43,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-26 13:23:43,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 216 [2023-08-26 13:23:43,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 107 transitions, 1435 flow. Second operand has 6 states, 6 states have (on average 89.33333333333333) internal successors, (536), 6 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:43,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:23:43,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 216 [2023-08-26 13:23:43,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:23:43,890 INFO L124 PetriNetUnfolderBase]: 634/1123 cut-off events. [2023-08-26 13:23:43,890 INFO L125 PetriNetUnfolderBase]: For 12970/12970 co-relation queries the response was YES. [2023-08-26 13:23:43,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7412 conditions, 1123 events. 634/1123 cut-off events. For 12970/12970 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 5265 event pairs, 28 based on Foata normal form. 32/1155 useless extension candidates. Maximal degree in co-relation 7378. Up to 660 conditions per place. [2023-08-26 13:23:43,901 INFO L140 encePairwiseOnDemand]: 209/216 looper letters, 116 selfloop transitions, 15 changer transitions 95/226 dead transitions. [2023-08-26 13:23:43,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 226 transitions, 3392 flow [2023-08-26 13:23:43,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 13:23:43,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 13:23:43,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 763 transitions. [2023-08-26 13:23:43,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155092592592593 [2023-08-26 13:23:43,904 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 763 transitions. [2023-08-26 13:23:43,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 763 transitions. [2023-08-26 13:23:43,904 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:23:43,904 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 763 transitions. [2023-08-26 13:23:43,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 95.375) internal successors, (763), 8 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:43,908 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 216.0) internal successors, (1944), 9 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:43,908 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 216.0) internal successors, (1944), 9 states have internal predecessors, (1944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:43,909 INFO L175 Difference]: Start difference. First operand has 92 places, 107 transitions, 1435 flow. Second operand 8 states and 763 transitions. [2023-08-26 13:23:43,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 226 transitions, 3392 flow [2023-08-26 13:23:43,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 226 transitions, 3262 flow, removed 34 selfloop flow, removed 5 redundant places. [2023-08-26 13:23:43,965 INFO L231 Difference]: Finished difference. Result has 99 places, 115 transitions, 1615 flow [2023-08-26 13:23:43,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=1360, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1615, PETRI_PLACES=99, PETRI_TRANSITIONS=115} [2023-08-26 13:23:43,967 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 57 predicate places. [2023-08-26 13:23:43,967 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 115 transitions, 1615 flow [2023-08-26 13:23:43,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 89.33333333333333) internal successors, (536), 6 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:43,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:23:43,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:23:43,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 13:23:43,968 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:23:43,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:23:43,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1047454368, now seen corresponding path program 1 times [2023-08-26 13:23:43,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:23:43,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113954069] [2023-08-26 13:23:43,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:23:43,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:23:43,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:23:44,135 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 13:23:44,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:23:44,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113954069] [2023-08-26 13:23:44,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113954069] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:23:44,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195334693] [2023-08-26 13:23:44,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:23:44,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:23:44,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:23:44,145 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 13:23:44,171 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 13:23:44,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:23:44,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-26 13:23:44,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:23:44,373 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 13:23:44,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:23:44,516 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 13:23:44,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195334693] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:23:44,516 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:23:44,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2023-08-26 13:23:44,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64655154] [2023-08-26 13:23:44,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:23:44,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 13:23:44,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:23:44,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 13:23:44,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2023-08-26 13:23:44,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 216 [2023-08-26 13:23:44,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 115 transitions, 1615 flow. Second operand has 13 states, 13 states have (on average 89.53846153846153) internal successors, (1164), 13 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:44,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:23:44,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 216 [2023-08-26 13:23:44,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:23:45,124 INFO L124 PetriNetUnfolderBase]: 878/1523 cut-off events. [2023-08-26 13:23:45,124 INFO L125 PetriNetUnfolderBase]: For 18743/18743 co-relation queries the response was YES. [2023-08-26 13:23:45,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10658 conditions, 1523 events. 878/1523 cut-off events. For 18743/18743 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7445 event pairs, 15 based on Foata normal form. 52/1575 useless extension candidates. Maximal degree in co-relation 10621. Up to 439 conditions per place. [2023-08-26 13:23:45,141 INFO L140 encePairwiseOnDemand]: 209/216 looper letters, 130 selfloop transitions, 58 changer transitions 154/342 dead transitions. [2023-08-26 13:23:45,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 342 transitions, 5211 flow [2023-08-26 13:23:45,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-26 13:23:45,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-26 13:23:45,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1604 transitions. [2023-08-26 13:23:45,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43681917211328974 [2023-08-26 13:23:45,146 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1604 transitions. [2023-08-26 13:23:45,146 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1604 transitions. [2023-08-26 13:23:45,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:23:45,147 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1604 transitions. [2023-08-26 13:23:45,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 94.3529411764706) internal successors, (1604), 17 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:45,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 216.0) internal successors, (3888), 18 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:45,156 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 216.0) internal successors, (3888), 18 states have internal predecessors, (3888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:45,156 INFO L175 Difference]: Start difference. First operand has 99 places, 115 transitions, 1615 flow. Second operand 17 states and 1604 transitions. [2023-08-26 13:23:45,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 342 transitions, 5211 flow [2023-08-26 13:23:45,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 342 transitions, 4953 flow, removed 69 selfloop flow, removed 5 redundant places. [2023-08-26 13:23:45,247 INFO L231 Difference]: Finished difference. Result has 113 places, 133 transitions, 2004 flow [2023-08-26 13:23:45,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=1480, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=2004, PETRI_PLACES=113, PETRI_TRANSITIONS=133} [2023-08-26 13:23:45,248 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2023-08-26 13:23:45,248 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 133 transitions, 2004 flow [2023-08-26 13:23:45,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 89.53846153846153) internal successors, (1164), 13 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:45,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:23:45,249 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:23:45,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-26 13:23:45,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-26 13:23:45,461 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:23:45,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:23:45,462 INFO L85 PathProgramCache]: Analyzing trace with hash 752960963, now seen corresponding path program 5 times [2023-08-26 13:23:45,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:23:45,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476848006] [2023-08-26 13:23:45,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:23:45,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:23:45,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:23:45,713 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 13:23:45,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:23:45,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476848006] [2023-08-26 13:23:45,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476848006] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:23:45,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090583403] [2023-08-26 13:23:45,714 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 13:23:45,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:23:45,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:23:45,715 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 13:23:45,738 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 13:23:45,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-26 13:23:45,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:23:45,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-26 13:23:45,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:23:45,919 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 13:23:45,919 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:23:46,107 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 13:23:46,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090583403] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:23:46,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:23:46,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2023-08-26 13:23:46,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274263697] [2023-08-26 13:23:46,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:23:46,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 13:23:46,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:23:46,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 13:23:46,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2023-08-26 13:23:46,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 216 [2023-08-26 13:23:46,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 133 transitions, 2004 flow. Second operand has 16 states, 16 states have (on average 87.3125) internal successors, (1397), 16 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:46,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:23:46,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 216 [2023-08-26 13:23:46,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:23:47,109 INFO L124 PetriNetUnfolderBase]: 908/1541 cut-off events. [2023-08-26 13:23:47,109 INFO L125 PetriNetUnfolderBase]: For 28534/28534 co-relation queries the response was YES. [2023-08-26 13:23:47,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11856 conditions, 1541 events. 908/1541 cut-off events. For 28534/28534 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7111 event pairs, 4 based on Foata normal form. 80/1621 useless extension candidates. Maximal degree in co-relation 11815. Up to 527 conditions per place. [2023-08-26 13:23:47,130 INFO L140 encePairwiseOnDemand]: 206/216 looper letters, 114 selfloop transitions, 83 changer transitions 118/315 dead transitions. [2023-08-26 13:23:47,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 315 transitions, 5270 flow [2023-08-26 13:23:47,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-26 13:23:47,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-26 13:23:47,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2346 transitions. [2023-08-26 13:23:47,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41773504273504275 [2023-08-26 13:23:47,135 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2346 transitions. [2023-08-26 13:23:47,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2346 transitions. [2023-08-26 13:23:47,136 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:23:47,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2346 transitions. [2023-08-26 13:23:47,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 90.23076923076923) internal successors, (2346), 26 states have internal predecessors, (2346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:47,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 216.0) internal successors, (5832), 27 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:47,148 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 216.0) internal successors, (5832), 27 states have internal predecessors, (5832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:47,149 INFO L175 Difference]: Start difference. First operand has 113 places, 133 transitions, 2004 flow. Second operand 26 states and 2346 transitions. [2023-08-26 13:23:47,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 315 transitions, 5270 flow [2023-08-26 13:23:47,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 315 transitions, 4805 flow, removed 149 selfloop flow, removed 10 redundant places. [2023-08-26 13:23:47,281 INFO L231 Difference]: Finished difference. Result has 141 places, 157 transitions, 2610 flow [2023-08-26 13:23:47,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=1720, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2610, PETRI_PLACES=141, PETRI_TRANSITIONS=157} [2023-08-26 13:23:47,281 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2023-08-26 13:23:47,281 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 157 transitions, 2610 flow [2023-08-26 13:23:47,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 87.3125) internal successors, (1397), 16 states have internal predecessors, (1397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:47,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:23:47,282 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:23:47,291 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 13:23:47,488 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,SelfDestructingSolverStorable16 [2023-08-26 13:23:47,489 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:23:47,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:23:47,489 INFO L85 PathProgramCache]: Analyzing trace with hash -15305432, now seen corresponding path program 1 times [2023-08-26 13:23:47,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:23:47,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110377309] [2023-08-26 13:23:47,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:23:47,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:23:47,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:23:47,778 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:23:47,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:23:47,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110377309] [2023-08-26 13:23:47,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110377309] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:23:47,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704763437] [2023-08-26 13:23:47,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:23:47,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:23:47,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:23:47,780 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 13:23:47,782 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 13:23:47,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:23:47,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-26 13:23:47,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:23:48,082 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:23:48,083 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:23:48,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:23:48,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704763437] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:23:48,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:23:48,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 20 [2023-08-26 13:23:48,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023778481] [2023-08-26 13:23:48,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:23:48,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-26 13:23:48,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:23:48,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-26 13:23:48,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2023-08-26 13:23:48,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 216 [2023-08-26 13:23:48,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 157 transitions, 2610 flow. Second operand has 21 states, 21 states have (on average 81.66666666666667) internal successors, (1715), 21 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:48,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:23:48,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 216 [2023-08-26 13:23:48,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:23:51,214 INFO L124 PetriNetUnfolderBase]: 1671/2862 cut-off events. [2023-08-26 13:23:51,214 INFO L125 PetriNetUnfolderBase]: For 74649/74649 co-relation queries the response was YES. [2023-08-26 13:23:51,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23434 conditions, 2862 events. 1671/2862 cut-off events. For 74649/74649 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 15440 event pairs, 19 based on Foata normal form. 72/2934 useless extension candidates. Maximal degree in co-relation 23378. Up to 891 conditions per place. [2023-08-26 13:23:51,249 INFO L140 encePairwiseOnDemand]: 207/216 looper letters, 208 selfloop transitions, 196 changer transitions 293/697 dead transitions. [2023-08-26 13:23:51,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 697 transitions, 11656 flow [2023-08-26 13:23:51,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-08-26 13:23:51,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2023-08-26 13:23:51,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 5054 transitions. [2023-08-26 13:23:51,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3965787821720025 [2023-08-26 13:23:51,256 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 5054 transitions. [2023-08-26 13:23:51,257 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 5054 transitions. [2023-08-26 13:23:51,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:23:51,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 5054 transitions. [2023-08-26 13:23:51,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 85.66101694915254) internal successors, (5054), 59 states have internal predecessors, (5054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:51,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 216.0) internal successors, (12960), 60 states have internal predecessors, (12960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:51,281 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 216.0) internal successors, (12960), 60 states have internal predecessors, (12960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:51,281 INFO L175 Difference]: Start difference. First operand has 141 places, 157 transitions, 2610 flow. Second operand 59 states and 5054 transitions. [2023-08-26 13:23:51,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 697 transitions, 11656 flow [2023-08-26 13:23:51,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 697 transitions, 10111 flow, removed 651 selfloop flow, removed 20 redundant places. [2023-08-26 13:23:51,550 INFO L231 Difference]: Finished difference. Result has 184 places, 269 transitions, 4768 flow [2023-08-26 13:23:51,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=2205, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=4768, PETRI_PLACES=184, PETRI_TRANSITIONS=269} [2023-08-26 13:23:51,550 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 142 predicate places. [2023-08-26 13:23:51,550 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 269 transitions, 4768 flow [2023-08-26 13:23:51,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 81.66666666666667) internal successors, (1715), 21 states have internal predecessors, (1715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:51,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:23:51,551 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:23:51,557 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 13:23:51,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-26 13:23:51,752 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:23:51,753 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:23:51,753 INFO L85 PathProgramCache]: Analyzing trace with hash -606740906, now seen corresponding path program 2 times [2023-08-26 13:23:51,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:23:51,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62029352] [2023-08-26 13:23:51,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:23:51,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:23:51,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:23:52,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:23:52,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:23:52,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62029352] [2023-08-26 13:23:52,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62029352] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:23:52,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37171163] [2023-08-26 13:23:52,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 13:23:52,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:23:52,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:23:52,162 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 13:23:52,163 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 13:23:52,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 13:23:52,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:23:52,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 19 conjunts are in the unsatisfiable core [2023-08-26 13:23:52,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:23:52,417 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:23:52,417 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:23:52,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:23:52,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37171163] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:23:52,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:23:52,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-08-26 13:23:52,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897622304] [2023-08-26 13:23:52,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:23:52,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-26 13:23:52,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:23:52,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-26 13:23:52,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2023-08-26 13:23:52,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 216 [2023-08-26 13:23:52,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 269 transitions, 4768 flow. Second operand has 21 states, 21 states have (on average 83.76190476190476) internal successors, (1759), 21 states have internal predecessors, (1759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:52,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:23:52,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 216 [2023-08-26 13:23:52,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:23:57,665 INFO L124 PetriNetUnfolderBase]: 4552/8215 cut-off events. [2023-08-26 13:23:57,665 INFO L125 PetriNetUnfolderBase]: For 202251/202251 co-relation queries the response was YES. [2023-08-26 13:23:57,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66954 conditions, 8215 events. 4552/8215 cut-off events. For 202251/202251 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 57436 event pairs, 45 based on Foata normal form. 224/8439 useless extension candidates. Maximal degree in co-relation 66893. Up to 2553 conditions per place. [2023-08-26 13:23:57,745 INFO L140 encePairwiseOnDemand]: 209/216 looper letters, 478 selfloop transitions, 512 changer transitions 757/1747 dead transitions. [2023-08-26 13:23:57,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 1747 transitions, 31969 flow [2023-08-26 13:23:57,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-08-26 13:23:57,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2023-08-26 13:23:57,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 7639 transitions. [2023-08-26 13:23:57,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4112295434969854 [2023-08-26 13:23:57,757 INFO L72 ComplementDD]: Start complementDD. Operand 86 states and 7639 transitions. [2023-08-26 13:23:57,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 86 states and 7639 transitions. [2023-08-26 13:23:57,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:23:57,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 86 states and 7639 transitions. [2023-08-26 13:23:57,770 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 87 states, 86 states have (on average 88.82558139534883) internal successors, (7639), 86 states have internal predecessors, (7639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:57,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 87 states, 87 states have (on average 216.0) internal successors, (18792), 87 states have internal predecessors, (18792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:57,895 INFO L81 ComplementDD]: Finished complementDD. Result has 87 states, 87 states have (on average 216.0) internal successors, (18792), 87 states have internal predecessors, (18792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:57,896 INFO L175 Difference]: Start difference. First operand has 184 places, 269 transitions, 4768 flow. Second operand 86 states and 7639 transitions. [2023-08-26 13:23:57,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 1747 transitions, 31969 flow [2023-08-26 13:23:59,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 1747 transitions, 27288 flow, removed 2229 selfloop flow, removed 23 redundant places. [2023-08-26 13:23:59,243 INFO L231 Difference]: Finished difference. Result has 238 places, 617 transitions, 11090 flow [2023-08-26 13:23:59,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=3725, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=86, PETRI_FLOW=11090, PETRI_PLACES=238, PETRI_TRANSITIONS=617} [2023-08-26 13:23:59,244 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 196 predicate places. [2023-08-26 13:23:59,244 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 617 transitions, 11090 flow [2023-08-26 13:23:59,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 83.76190476190476) internal successors, (1759), 21 states have internal predecessors, (1759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:23:59,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:23:59,245 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:23:59,250 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 13:23:59,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:23:59,446 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:23:59,446 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:23:59,446 INFO L85 PathProgramCache]: Analyzing trace with hash -566210664, now seen corresponding path program 3 times [2023-08-26 13:23:59,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:23:59,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582095040] [2023-08-26 13:23:59,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:23:59,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:23:59,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:23:59,699 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:23:59,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:23:59,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582095040] [2023-08-26 13:23:59,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582095040] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:23:59,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539487448] [2023-08-26 13:23:59,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 13:23:59,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:23:59,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:23:59,705 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 13:23:59,708 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 13:23:59,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-26 13:23:59,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:23:59,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-26 13:23:59,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:23:59,992 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:23:59,992 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:24:00,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:24:00,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539487448] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:24:00,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:24:00,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 10] total 23 [2023-08-26 13:24:00,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898965901] [2023-08-26 13:24:00,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:24:00,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-26 13:24:00,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:00,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-26 13:24:00,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2023-08-26 13:24:00,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 216 [2023-08-26 13:24:00,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 617 transitions, 11090 flow. Second operand has 24 states, 24 states have (on average 81.45833333333333) internal successors, (1955), 24 states have internal predecessors, (1955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:00,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:00,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 216 [2023-08-26 13:24:00,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:12,181 INFO L124 PetriNetUnfolderBase]: 10845/19108 cut-off events. [2023-08-26 13:24:12,181 INFO L125 PetriNetUnfolderBase]: For 375936/375936 co-relation queries the response was YES. [2023-08-26 13:24:12,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151089 conditions, 19108 events. 10845/19108 cut-off events. For 375936/375936 co-relation queries the response was YES. Maximal size of possible extension queue 854. Compared 148615 event pairs, 106 based on Foata normal form. 896/20004 useless extension candidates. Maximal degree in co-relation 151029. Up to 6089 conditions per place. [2023-08-26 13:24:12,404 INFO L140 encePairwiseOnDemand]: 206/216 looper letters, 723 selfloop transitions, 1385 changer transitions 1040/3148 dead transitions. [2023-08-26 13:24:12,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 3148 transitions, 59534 flow [2023-08-26 13:24:12,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2023-08-26 13:24:12,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2023-08-26 13:24:12,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 17132 transitions. [2023-08-26 13:24:12,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38879811183732754 [2023-08-26 13:24:12,426 INFO L72 ComplementDD]: Start complementDD. Operand 204 states and 17132 transitions. [2023-08-26 13:24:12,426 INFO L73 IsDeterministic]: Start isDeterministic. Operand 204 states and 17132 transitions. [2023-08-26 13:24:12,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:12,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 204 states and 17132 transitions. [2023-08-26 13:24:12,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 205 states, 204 states have (on average 83.98039215686275) internal successors, (17132), 204 states have internal predecessors, (17132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:12,509 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 205 states, 205 states have (on average 216.0) internal successors, (44280), 205 states have internal predecessors, (44280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:12,523 INFO L81 ComplementDD]: Finished complementDD. Result has 205 states, 205 states have (on average 216.0) internal successors, (44280), 205 states have internal predecessors, (44280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:12,523 INFO L175 Difference]: Start difference. First operand has 238 places, 617 transitions, 11090 flow. Second operand 204 states and 17132 transitions. [2023-08-26 13:24:12,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 3148 transitions, 59534 flow [2023-08-26 13:24:18,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 3148 transitions, 52691 flow, removed 3392 selfloop flow, removed 23 redundant places. [2023-08-26 13:24:18,109 INFO L231 Difference]: Finished difference. Result has 511 places, 1724 transitions, 31781 flow [2023-08-26 13:24:18,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=9588, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=455, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=204, PETRI_FLOW=31781, PETRI_PLACES=511, PETRI_TRANSITIONS=1724} [2023-08-26 13:24:18,110 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 469 predicate places. [2023-08-26 13:24:18,110 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 1724 transitions, 31781 flow [2023-08-26 13:24:18,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 81.45833333333333) internal successors, (1955), 24 states have internal predecessors, (1955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:18,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:24:18,111 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:24:18,121 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 13:24:18,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:24:18,317 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:24:18,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:24:18,317 INFO L85 PathProgramCache]: Analyzing trace with hash 243237152, now seen corresponding path program 4 times [2023-08-26 13:24:18,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:24:18,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654628950] [2023-08-26 13:24:18,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:24:18,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:24:18,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:24:18,957 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:24:18,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:24:18,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654628950] [2023-08-26 13:24:18,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654628950] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:24:18,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743542313] [2023-08-26 13:24:18,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 13:24:18,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:24:18,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:24:18,959 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 13:24:18,961 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 13:24:19,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 13:24:19,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:24:19,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-26 13:24:19,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:24:19,317 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:24:19,318 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:24:19,808 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:24:19,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743542313] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:24:19,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:24:19,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 31 [2023-08-26 13:24:19,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208123898] [2023-08-26 13:24:19,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:24:19,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-26 13:24:19,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:24:19,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-26 13:24:19,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=800, Unknown=0, NotChecked=0, Total=992 [2023-08-26 13:24:19,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 216 [2023-08-26 13:24:19,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 1724 transitions, 31781 flow. Second operand has 32 states, 32 states have (on average 81.21875) internal successors, (2599), 32 states have internal predecessors, (2599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:19,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:24:19,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 216 [2023-08-26 13:24:19,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:24:55,858 INFO L124 PetriNetUnfolderBase]: 32870/57745 cut-off events. [2023-08-26 13:24:55,858 INFO L125 PetriNetUnfolderBase]: For 3461875/3461875 co-relation queries the response was YES. [2023-08-26 13:24:58,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 499308 conditions, 57745 events. 32870/57745 cut-off events. For 3461875/3461875 co-relation queries the response was YES. Maximal size of possible extension queue 2476. Compared 522557 event pairs, 172 based on Foata normal form. 3402/61147 useless extension candidates. Maximal degree in co-relation 499128. Up to 19193 conditions per place. [2023-08-26 13:24:58,802 INFO L140 encePairwiseOnDemand]: 206/216 looper letters, 1325 selfloop transitions, 3929 changer transitions 3502/8756 dead transitions. [2023-08-26 13:24:58,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 619 places, 8756 transitions, 180465 flow [2023-08-26 13:24:58,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 234 states. [2023-08-26 13:24:58,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2023-08-26 13:24:58,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 19730 transitions. [2023-08-26 13:24:58,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39035295979740425 [2023-08-26 13:24:58,825 INFO L72 ComplementDD]: Start complementDD. Operand 234 states and 19730 transitions. [2023-08-26 13:24:58,825 INFO L73 IsDeterministic]: Start isDeterministic. Operand 234 states and 19730 transitions. [2023-08-26 13:24:58,830 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:24:58,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 234 states and 19730 transitions. [2023-08-26 13:24:58,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 235 states, 234 states have (on average 84.31623931623932) internal successors, (19730), 234 states have internal predecessors, (19730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:58,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 235 states, 235 states have (on average 216.0) internal successors, (50760), 235 states have internal predecessors, (50760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:58,909 INFO L81 ComplementDD]: Finished complementDD. Result has 235 states, 235 states have (on average 216.0) internal successors, (50760), 235 states have internal predecessors, (50760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:24:58,909 INFO L175 Difference]: Start difference. First operand has 511 places, 1724 transitions, 31781 flow. Second operand 234 states and 19730 transitions. [2023-08-26 13:24:58,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 619 places, 8756 transitions, 180465 flow [2023-08-26 13:26:36,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 8756 transitions, 162350 flow, removed 5227 selfloop flow, removed 129 redundant places. [2023-08-26 13:26:36,440 INFO L231 Difference]: Finished difference. Result has 639 places, 4673 transitions, 90518 flow [2023-08-26 13:26:36,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=216, PETRI_DIFFERENCE_MINUEND_FLOW=28651, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1390, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=234, PETRI_FLOW=90518, PETRI_PLACES=639, PETRI_TRANSITIONS=4673} [2023-08-26 13:26:36,442 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 597 predicate places. [2023-08-26 13:26:36,442 INFO L495 AbstractCegarLoop]: Abstraction has has 639 places, 4673 transitions, 90518 flow [2023-08-26 13:26:36,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 81.21875) internal successors, (2599), 32 states have internal predecessors, (2599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:26:36,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 13:26:36,443 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 13:26:36,448 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 13:26:36,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:26:36,644 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-08-26 13:26:36,644 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 13:26:36,644 INFO L85 PathProgramCache]: Analyzing trace with hash -213489906, now seen corresponding path program 5 times [2023-08-26 13:26:36,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 13:26:36,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915917794] [2023-08-26 13:26:36,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 13:26:36,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 13:26:36,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 13:26:37,282 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:26:37,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 13:26:37,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915917794] [2023-08-26 13:26:37,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915917794] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 13:26:37,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407510630] [2023-08-26 13:26:37,283 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 13:26:37,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 13:26:37,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 13:26:37,284 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 13:26:37,286 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 13:26:37,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-26 13:26:37,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 13:26:37,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-26 13:26:37,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 13:26:37,651 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:26:37,652 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 13:26:38,157 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 13:26:38,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [407510630] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 13:26:38,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 13:26:38,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 30 [2023-08-26 13:26:38,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660611369] [2023-08-26 13:26:38,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 13:26:38,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-26 13:26:38,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 13:26:38,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-26 13:26:38,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2023-08-26 13:26:38,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 81 out of 216 [2023-08-26 13:26:38,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 639 places, 4673 transitions, 90518 flow. Second operand has 31 states, 31 states have (on average 83.19354838709677) internal successors, (2579), 31 states have internal predecessors, (2579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:26:38,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 13:26:38,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 81 of 216 [2023-08-26 13:26:38,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 13:29:56,189 INFO L124 PetriNetUnfolderBase]: 105916/183605 cut-off events. [2023-08-26 13:29:56,190 INFO L125 PetriNetUnfolderBase]: For 26102019/26102019 co-relation queries the response was YES. [2023-08-26 13:30:08,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1666724 conditions, 183605 events. 105916/183605 cut-off events. For 26102019/26102019 co-relation queries the response was YES. Maximal size of possible extension queue 6642. Compared 1881062 event pairs, 487 based on Foata normal form. 4944/188549 useless extension candidates. Maximal degree in co-relation 1666516. Up to 60495 conditions per place. [2023-08-26 13:30:09,604 INFO L140 encePairwiseOnDemand]: 208/216 looper letters, 2104 selfloop transitions, 8049 changer transitions 14659/24812 dead transitions. [2023-08-26 13:30:09,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 642 places, 24812 transitions, 547265 flow [2023-08-26 13:30:09,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2023-08-26 13:30:09,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2023-08-26 13:30:09,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 13263 transitions. [2023-08-26 13:30:09,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40935185185185186 [2023-08-26 13:30:09,622 INFO L72 ComplementDD]: Start complementDD. Operand 150 states and 13263 transitions. [2023-08-26 13:30:09,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 150 states and 13263 transitions. [2023-08-26 13:30:09,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 13:30:09,626 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 150 states and 13263 transitions. [2023-08-26 13:30:09,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 151 states, 150 states have (on average 88.42) internal successors, (13263), 150 states have internal predecessors, (13263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:30:09,668 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 151 states, 151 states have (on average 216.0) internal successors, (32616), 151 states have internal predecessors, (32616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:30:09,673 INFO L81 ComplementDD]: Finished complementDD. Result has 151 states, 151 states have (on average 216.0) internal successors, (32616), 151 states have internal predecessors, (32616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 13:30:09,674 INFO L175 Difference]: Start difference. First operand has 639 places, 4673 transitions, 90518 flow. Second operand 150 states and 13263 transitions. [2023-08-26 13:30:09,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 642 places, 24812 transitions, 547265 flow Received shutdown request... [2023-08-26 13:35:58,010 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-26 13:35:58,010 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 13:35:59,022 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 13:35:59,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown