/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/pthread/triangular-longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 17:43:01,319 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 17:43:01,405 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 17:43:01,409 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 17:43:01,410 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 17:43:01,442 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 17:43:01,442 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 17:43:01,443 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 17:43:01,443 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 17:43:01,444 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 17:43:01,444 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 17:43:01,444 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 17:43:01,445 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 17:43:01,448 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 17:43:01,448 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 17:43:01,448 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 17:43:01,449 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 17:43:01,449 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 17:43:01,450 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 17:43:01,450 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 17:43:01,450 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 17:43:01,451 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 17:43:01,451 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 17:43:01,452 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 17:43:01,452 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 17:43:01,452 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 17:43:01,453 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 17:43:01,453 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 17:43:01,453 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 17:43:01,454 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 17:43:01,454 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 17:43:01,455 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 17:43:01,455 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 17:43:01,455 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 17:43:01,455 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 17:43:01,456 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 17:43:01,791 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 17:43:01,811 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 17:43:01,813 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 17:43:01,814 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 17:43:01,816 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 17:43:01,818 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-1.i [2023-08-26 17:43:03,061 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 17:43:03,352 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 17:43:03,353 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i [2023-08-26 17:43:03,370 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed2759cc8/a68ce064bd3a4d538bd48da53ac44783/FLAGa684d8eb8 [2023-08-26 17:43:03,387 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed2759cc8/a68ce064bd3a4d538bd48da53ac44783 [2023-08-26 17:43:03,389 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 17:43:03,391 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 17:43:03,392 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 17:43:03,392 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 17:43:03,394 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 17:43:03,395 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 05:43:03" (1/1) ... [2023-08-26 17:43:03,396 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@177f911f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:43:03, skipping insertion in model container [2023-08-26 17:43:03,396 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 05:43:03" (1/1) ... [2023-08-26 17:43:03,442 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 17:43:03,705 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 17:43:03,718 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 17:43:03,749 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [245] [2023-08-26 17:43:03,751 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [245] [2023-08-26 17:43:03,777 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 17:43:03,813 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 17:43:03,813 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 17:43:03,820 INFO L206 MainTranslator]: Completed translation [2023-08-26 17:43:03,820 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:43:03 WrapperNode [2023-08-26 17:43:03,820 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 17:43:03,821 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 17:43:03,821 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 17:43:03,821 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 17:43:03,827 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:43:03" (1/1) ... [2023-08-26 17:43:03,841 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:43:03" (1/1) ... [2023-08-26 17:43:03,864 INFO L138 Inliner]: procedures = 169, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 50 [2023-08-26 17:43:03,865 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 17:43:03,866 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 17:43:03,866 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 17:43:03,866 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 17:43:03,873 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:43:03" (1/1) ... [2023-08-26 17:43:03,874 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:43:03" (1/1) ... [2023-08-26 17:43:03,890 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:43:03" (1/1) ... [2023-08-26 17:43:03,891 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:43:03" (1/1) ... [2023-08-26 17:43:03,896 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:43:03" (1/1) ... [2023-08-26 17:43:03,899 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:43:03" (1/1) ... [2023-08-26 17:43:03,901 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:43:03" (1/1) ... [2023-08-26 17:43:03,902 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:43:03" (1/1) ... [2023-08-26 17:43:03,904 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 17:43:03,912 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 17:43:03,912 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 17:43:03,912 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 17:43:03,913 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:43:03" (1/1) ... [2023-08-26 17:43:03,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 17:43:03,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:43:03,942 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 17:43:03,949 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 17:43:03,969 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-26 17:43:03,969 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-26 17:43:03,969 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-26 17:43:03,970 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-26 17:43:03,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 17:43:03,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 17:43:03,972 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 17:43:03,972 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 17:43:03,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 17:43:03,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 17:43:03,972 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 17:43:03,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 17:43:03,972 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 17:43:03,974 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 17:43:04,103 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 17:43:04,105 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 17:43:04,269 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 17:43:04,274 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 17:43:04,274 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-26 17:43:04,276 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 05:43:04 BoogieIcfgContainer [2023-08-26 17:43:04,276 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 17:43:04,278 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 17:43:04,278 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 17:43:04,284 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 17:43:04,284 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 05:43:03" (1/3) ... [2023-08-26 17:43:04,285 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10f5903c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 05:43:04, skipping insertion in model container [2023-08-26 17:43:04,286 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:43:03" (2/3) ... [2023-08-26 17:43:04,286 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10f5903c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 05:43:04, skipping insertion in model container [2023-08-26 17:43:04,286 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 05:43:04" (3/3) ... [2023-08-26 17:43:04,288 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2023-08-26 17:43:04,304 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 17:43:04,304 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2023-08-26 17:43:04,305 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 17:43:04,391 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 17:43:04,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 76 transitions, 162 flow [2023-08-26 17:43:04,499 INFO L124 PetriNetUnfolderBase]: 6/74 cut-off events. [2023-08-26 17:43:04,500 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 17:43:04,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 74 events. 6/74 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 99 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2023-08-26 17:43:04,505 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 76 transitions, 162 flow [2023-08-26 17:43:04,508 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 74 transitions, 154 flow [2023-08-26 17:43:04,511 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 17:43:04,523 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 74 transitions, 154 flow [2023-08-26 17:43:04,526 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 75 places, 74 transitions, 154 flow [2023-08-26 17:43:04,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 74 transitions, 154 flow [2023-08-26 17:43:04,551 INFO L124 PetriNetUnfolderBase]: 6/74 cut-off events. [2023-08-26 17:43:04,551 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 17:43:04,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 74 events. 6/74 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 99 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2023-08-26 17:43:04,554 INFO L119 LiptonReduction]: Number of co-enabled transitions 1440 [2023-08-26 17:43:06,724 INFO L134 LiptonReduction]: Checked pairs total: 1354 [2023-08-26 17:43:06,724 INFO L136 LiptonReduction]: Total number of compositions: 81 [2023-08-26 17:43:06,749 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 17:43:06,756 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;@17c6023e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 17:43:06,757 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-26 17:43:06,759 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 17:43:06,759 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 17:43:06,759 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 17:43:06,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:43:06,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 17:43:06,760 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:43:06,767 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:43:06,768 INFO L85 PathProgramCache]: Analyzing trace with hash 313, now seen corresponding path program 1 times [2023-08-26 17:43:06,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:43:06,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660077663] [2023-08-26 17:43:06,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:43:06,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:43:06,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:43:06,865 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 17:43:06,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:43:06,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660077663] [2023-08-26 17:43:06,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660077663] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:43:06,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:43:06,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 17:43:06,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796745229] [2023-08-26 17:43:06,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:43:06,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 17:43:06,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:43:06,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 17:43:06,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 17:43:06,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 157 [2023-08-26 17:43:06,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 42 flow. Second operand has 2 states, 2 states have (on average 69.5) internal successors, (139), 2 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:06,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:43:06,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 157 [2023-08-26 17:43:06,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:43:06,955 INFO L124 PetriNetUnfolderBase]: 76/125 cut-off events. [2023-08-26 17:43:06,955 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 17:43:06,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 125 events. 76/125 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 298 event pairs, 48 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 252. Up to 126 conditions per place. [2023-08-26 17:43:06,957 INFO L140 encePairwiseOnDemand]: 154/157 looper letters, 14 selfloop transitions, 0 changer transitions 1/15 dead transitions. [2023-08-26 17:43:06,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 15 transitions, 66 flow [2023-08-26 17:43:06,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 17:43:06,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 17:43:06,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 156 transitions. [2023-08-26 17:43:06,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4968152866242038 [2023-08-26 17:43:06,971 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 156 transitions. [2023-08-26 17:43:06,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 156 transitions. [2023-08-26 17:43:06,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:43:06,975 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 156 transitions. [2023-08-26 17:43:06,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:06,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:06,981 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:06,983 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 42 flow. Second operand 2 states and 156 transitions. [2023-08-26 17:43:06,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 15 transitions, 66 flow [2023-08-26 17:43:06,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 15 transitions, 64 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 17:43:06,986 INFO L231 Difference]: Finished difference. Result has 19 places, 14 transitions, 32 flow [2023-08-26 17:43:06,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=32, PETRI_PLACES=19, PETRI_TRANSITIONS=14} [2023-08-26 17:43:06,991 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -3 predicate places. [2023-08-26 17:43:06,991 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 14 transitions, 32 flow [2023-08-26 17:43:06,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 69.5) internal successors, (139), 2 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:06,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:43:06,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 17:43:06,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 17:43:06,992 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:43:06,993 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:43:06,993 INFO L85 PathProgramCache]: Analyzing trace with hash 306362, now seen corresponding path program 1 times [2023-08-26 17:43:06,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:43:06,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496825408] [2023-08-26 17:43:06,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:43:06,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:43:07,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:43:07,242 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 17:43:07,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:43:07,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496825408] [2023-08-26 17:43:07,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496825408] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:43:07,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:43:07,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 17:43:07,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671751537] [2023-08-26 17:43:07,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:43:07,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:43:07,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:43:07,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:43:07,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:43:07,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 157 [2023-08-26 17:43:07,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 14 transitions, 32 flow. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:07,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:43:07,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 157 [2023-08-26 17:43:07,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:43:07,284 INFO L124 PetriNetUnfolderBase]: 55/92 cut-off events. [2023-08-26 17:43:07,285 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 17:43:07,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 92 events. 55/92 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 194 event pairs, 34 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 192. Up to 92 conditions per place. [2023-08-26 17:43:07,286 INFO L140 encePairwiseOnDemand]: 155/157 looper letters, 12 selfloop transitions, 1 changer transitions 0/13 dead transitions. [2023-08-26 17:43:07,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 13 transitions, 56 flow [2023-08-26 17:43:07,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:43:07,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:43:07,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 185 transitions. [2023-08-26 17:43:07,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39278131634819535 [2023-08-26 17:43:07,289 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 185 transitions. [2023-08-26 17:43:07,289 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 185 transitions. [2023-08-26 17:43:07,290 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:43:07,290 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 185 transitions. [2023-08-26 17:43:07,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:07,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:07,293 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:07,293 INFO L175 Difference]: Start difference. First operand has 19 places, 14 transitions, 32 flow. Second operand 3 states and 185 transitions. [2023-08-26 17:43:07,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 13 transitions, 56 flow [2023-08-26 17:43:07,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 13 transitions, 56 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 17:43:07,294 INFO L231 Difference]: Finished difference. Result has 19 places, 13 transitions, 32 flow [2023-08-26 17:43:07,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=32, PETRI_PLACES=19, PETRI_TRANSITIONS=13} [2023-08-26 17:43:07,295 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -3 predicate places. [2023-08-26 17:43:07,295 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 13 transitions, 32 flow [2023-08-26 17:43:07,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:07,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:43:07,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 17:43:07,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 17:43:07,296 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:43:07,297 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:43:07,297 INFO L85 PathProgramCache]: Analyzing trace with hash 306361, now seen corresponding path program 1 times [2023-08-26 17:43:07,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:43:07,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621354940] [2023-08-26 17:43:07,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:43:07,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:43:07,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:43:07,380 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 17:43:07,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:43:07,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621354940] [2023-08-26 17:43:07,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621354940] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:43:07,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:43:07,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 17:43:07,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759014597] [2023-08-26 17:43:07,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:43:07,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:43:07,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:43:07,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:43:07,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:43:07,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 157 [2023-08-26 17:43:07,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 13 transitions, 32 flow. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:07,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:43:07,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 157 [2023-08-26 17:43:07,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:43:07,425 INFO L124 PetriNetUnfolderBase]: 52/86 cut-off events. [2023-08-26 17:43:07,425 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 17:43:07,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 86 events. 52/86 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 170 event pairs, 32 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 181. Up to 86 conditions per place. [2023-08-26 17:43:07,426 INFO L140 encePairwiseOnDemand]: 155/157 looper letters, 11 selfloop transitions, 1 changer transitions 0/12 dead transitions. [2023-08-26 17:43:07,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 12 transitions, 54 flow [2023-08-26 17:43:07,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:43:07,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:43:07,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 178 transitions. [2023-08-26 17:43:07,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37791932059447986 [2023-08-26 17:43:07,429 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 178 transitions. [2023-08-26 17:43:07,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 178 transitions. [2023-08-26 17:43:07,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:43:07,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 178 transitions. [2023-08-26 17:43:07,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:07,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:07,432 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:07,432 INFO L175 Difference]: Start difference. First operand has 19 places, 13 transitions, 32 flow. Second operand 3 states and 178 transitions. [2023-08-26 17:43:07,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 12 transitions, 54 flow [2023-08-26 17:43:07,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 12 transitions, 53 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 17:43:07,433 INFO L231 Difference]: Finished difference. Result has 19 places, 12 transitions, 31 flow [2023-08-26 17:43:07,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=29, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=31, PETRI_PLACES=19, PETRI_TRANSITIONS=12} [2023-08-26 17:43:07,434 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -3 predicate places. [2023-08-26 17:43:07,434 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 12 transitions, 31 flow [2023-08-26 17:43:07,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:07,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:43:07,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 17:43:07,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 17:43:07,435 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:43:07,436 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:43:07,436 INFO L85 PathProgramCache]: Analyzing trace with hash 537039974, now seen corresponding path program 1 times [2023-08-26 17:43:07,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:43:07,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743438526] [2023-08-26 17:43:07,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:43:07,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:43:07,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:43:07,566 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 17:43:07,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:43:07,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743438526] [2023-08-26 17:43:07,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743438526] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:43:07,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:43:07,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 17:43:07,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385191147] [2023-08-26 17:43:07,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:43:07,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 17:43:07,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:43:07,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 17:43:07,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 17:43:07,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:43:07,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 12 transitions, 31 flow. Second operand has 4 states, 4 states have (on average 61.5) internal successors, (246), 4 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:07,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:43:07,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:43:07,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:43:07,633 INFO L124 PetriNetUnfolderBase]: 64/107 cut-off events. [2023-08-26 17:43:07,634 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 17:43:07,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 107 events. 64/107 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 232 event pairs, 11 based on Foata normal form. 9/87 useless extension candidates. Maximal degree in co-relation 224. Up to 55 conditions per place. [2023-08-26 17:43:07,639 INFO L140 encePairwiseOnDemand]: 153/157 looper letters, 18 selfloop transitions, 4 changer transitions 2/24 dead transitions. [2023-08-26 17:43:07,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 24 transitions, 103 flow [2023-08-26 17:43:07,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 17:43:07,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 17:43:07,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 265 transitions. [2023-08-26 17:43:07,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42197452229299365 [2023-08-26 17:43:07,642 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 265 transitions. [2023-08-26 17:43:07,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 265 transitions. [2023-08-26 17:43:07,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:43:07,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 265 transitions. [2023-08-26 17:43:07,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 66.25) internal successors, (265), 4 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 17:43:07,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 157.0) internal successors, (785), 5 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:07,648 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 157.0) internal successors, (785), 5 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:07,649 INFO L175 Difference]: Start difference. First operand has 19 places, 12 transitions, 31 flow. Second operand 4 states and 265 transitions. [2023-08-26 17:43:07,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 24 transitions, 103 flow [2023-08-26 17:43:07,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 24 transitions, 102 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 17:43:07,650 INFO L231 Difference]: Finished difference. Result has 23 places, 15 transitions, 55 flow [2023-08-26 17:43:07,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=55, PETRI_PLACES=23, PETRI_TRANSITIONS=15} [2023-08-26 17:43:07,651 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 1 predicate places. [2023-08-26 17:43:07,651 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 15 transitions, 55 flow [2023-08-26 17:43:07,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.5) internal successors, (246), 4 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:07,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:43:07,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:43:07,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 17:43:07,652 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:43:07,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:43:07,653 INFO L85 PathProgramCache]: Analyzing trace with hash 698883682, now seen corresponding path program 1 times [2023-08-26 17:43:07,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:43:07,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319683780] [2023-08-26 17:43:07,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:43:07,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:43:07,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:43:07,796 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 17:43:07,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:43:07,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319683780] [2023-08-26 17:43:07,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319683780] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:43:07,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:43:07,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 17:43:07,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873526139] [2023-08-26 17:43:07,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:43:07,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 17:43:07,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:43:07,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 17:43:07,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 17:43:07,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:43:07,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 15 transitions, 55 flow. Second operand has 5 states, 5 states have (on average 61.6) internal successors, (308), 5 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:07,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:43:07,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:43:07,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:43:07,900 INFO L124 PetriNetUnfolderBase]: 126/217 cut-off events. [2023-08-26 17:43:07,904 INFO L125 PetriNetUnfolderBase]: For 73/73 co-relation queries the response was YES. [2023-08-26 17:43:07,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 550 conditions, 217 events. 126/217 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 667 event pairs, 19 based on Foata normal form. 10/191 useless extension candidates. Maximal degree in co-relation 544. Up to 89 conditions per place. [2023-08-26 17:43:07,908 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 33 selfloop transitions, 9 changer transitions 0/42 dead transitions. [2023-08-26 17:43:07,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 42 transitions, 217 flow [2023-08-26 17:43:07,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 17:43:07,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 17:43:07,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 398 transitions. [2023-08-26 17:43:07,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42250530785562634 [2023-08-26 17:43:07,910 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 398 transitions. [2023-08-26 17:43:07,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 398 transitions. [2023-08-26 17:43:07,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:43:07,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 398 transitions. [2023-08-26 17:43:07,911 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 66.33333333333333) internal successors, (398), 6 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 17:43:07,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 157.0) internal successors, (1099), 7 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:07,914 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 157.0) internal successors, (1099), 7 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:07,914 INFO L175 Difference]: Start difference. First operand has 23 places, 15 transitions, 55 flow. Second operand 6 states and 398 transitions. [2023-08-26 17:43:07,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 42 transitions, 217 flow [2023-08-26 17:43:07,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 42 transitions, 217 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 17:43:07,916 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 136 flow [2023-08-26 17:43:07,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=136, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2023-08-26 17:43:07,919 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 10 predicate places. [2023-08-26 17:43:07,919 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 136 flow [2023-08-26 17:43:07,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 61.6) internal successors, (308), 5 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:07,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:43:07,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:43:07,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 17:43:07,920 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:43:07,921 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:43:07,921 INFO L85 PathProgramCache]: Analyzing trace with hash 698901352, now seen corresponding path program 2 times [2023-08-26 17:43:07,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:43:07,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729104593] [2023-08-26 17:43:07,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:43:07,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:43:07,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:43:08,057 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 17:43:08,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:43:08,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729104593] [2023-08-26 17:43:08,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729104593] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:43:08,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:43:08,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 17:43:08,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336378891] [2023-08-26 17:43:08,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:43:08,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 17:43:08,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:43:08,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 17:43:08,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 17:43:08,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:43:08,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 61.6) internal successors, (308), 5 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:08,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:43:08,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:43:08,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:43:08,143 INFO L124 PetriNetUnfolderBase]: 114/199 cut-off events. [2023-08-26 17:43:08,143 INFO L125 PetriNetUnfolderBase]: For 280/280 co-relation queries the response was YES. [2023-08-26 17:43:08,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 657 conditions, 199 events. 114/199 cut-off events. For 280/280 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 625 event pairs, 19 based on Foata normal form. 10/209 useless extension candidates. Maximal degree in co-relation 646. Up to 84 conditions per place. [2023-08-26 17:43:08,145 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 29 selfloop transitions, 9 changer transitions 4/42 dead transitions. [2023-08-26 17:43:08,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 42 transitions, 286 flow [2023-08-26 17:43:08,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 17:43:08,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 17:43:08,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 333 transitions. [2023-08-26 17:43:08,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42420382165605097 [2023-08-26 17:43:08,148 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 333 transitions. [2023-08-26 17:43:08,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 333 transitions. [2023-08-26 17:43:08,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:43:08,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 333 transitions. [2023-08-26 17:43:08,149 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 66.6) internal successors, (333), 5 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:08,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:08,151 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:08,151 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 136 flow. Second operand 5 states and 333 transitions. [2023-08-26 17:43:08,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 42 transitions, 286 flow [2023-08-26 17:43:08,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 42 transitions, 284 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-26 17:43:08,157 INFO L231 Difference]: Finished difference. Result has 38 places, 26 transitions, 184 flow [2023-08-26 17:43:08,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=184, PETRI_PLACES=38, PETRI_TRANSITIONS=26} [2023-08-26 17:43:08,159 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 16 predicate places. [2023-08-26 17:43:08,162 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 26 transitions, 184 flow [2023-08-26 17:43:08,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 61.6) internal successors, (308), 5 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:08,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:43:08,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:43:08,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 17:43:08,163 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:43:08,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:43:08,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1937873995, now seen corresponding path program 1 times [2023-08-26 17:43:08,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:43:08,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141603296] [2023-08-26 17:43:08,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:43:08,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:43:08,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:43:08,285 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 17:43:08,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:43:08,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141603296] [2023-08-26 17:43:08,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141603296] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:43:08,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:43:08,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 17:43:08,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567595054] [2023-08-26 17:43:08,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:43:08,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 17:43:08,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:43:08,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 17:43:08,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-26 17:43:08,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:43:08,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 26 transitions, 184 flow. Second operand has 6 states, 6 states have (on average 61.666666666666664) internal successors, (370), 6 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:08,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:43:08,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:43:08,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:43:08,449 INFO L124 PetriNetUnfolderBase]: 126/219 cut-off events. [2023-08-26 17:43:08,450 INFO L125 PetriNetUnfolderBase]: For 533/533 co-relation queries the response was YES. [2023-08-26 17:43:08,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 797 conditions, 219 events. 126/219 cut-off events. For 533/533 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 705 event pairs, 19 based on Foata normal form. 4/223 useless extension candidates. Maximal degree in co-relation 783. Up to 86 conditions per place. [2023-08-26 17:43:08,452 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 32 selfloop transitions, 16 changer transitions 11/59 dead transitions. [2023-08-26 17:43:08,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 427 flow [2023-08-26 17:43:08,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 17:43:08,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 17:43:08,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 592 transitions. [2023-08-26 17:43:08,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.418966737438075 [2023-08-26 17:43:08,455 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 592 transitions. [2023-08-26 17:43:08,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 592 transitions. [2023-08-26 17:43:08,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:43:08,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 592 transitions. [2023-08-26 17:43:08,457 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 65.77777777777777) internal successors, (592), 9 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:08,459 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 157.0) internal successors, (1570), 10 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:08,461 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 157.0) internal successors, (1570), 10 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:08,461 INFO L175 Difference]: Start difference. First operand has 38 places, 26 transitions, 184 flow. Second operand 9 states and 592 transitions. [2023-08-26 17:43:08,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 427 flow [2023-08-26 17:43:08,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 59 transitions, 390 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-08-26 17:43:08,471 INFO L231 Difference]: Finished difference. Result has 45 places, 32 transitions, 253 flow [2023-08-26 17:43:08,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=253, PETRI_PLACES=45, PETRI_TRANSITIONS=32} [2023-08-26 17:43:08,472 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 23 predicate places. [2023-08-26 17:43:08,473 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 32 transitions, 253 flow [2023-08-26 17:43:08,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 61.666666666666664) internal successors, (370), 6 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:08,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:43:08,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:43:08,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 17:43:08,474 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:43:08,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:43:08,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1938173455, now seen corresponding path program 2 times [2023-08-26 17:43:08,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:43:08,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717610995] [2023-08-26 17:43:08,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:43:08,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:43:08,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:43:08,591 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 17:43:08,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:43:08,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717610995] [2023-08-26 17:43:08,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717610995] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:43:08,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:43:08,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 17:43:08,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103524205] [2023-08-26 17:43:08,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:43:08,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 17:43:08,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:43:08,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 17:43:08,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-26 17:43:08,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:43:08,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 32 transitions, 253 flow. Second operand has 6 states, 6 states have (on average 61.666666666666664) internal successors, (370), 6 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:08,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:43:08,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:43:08,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:43:08,709 INFO L124 PetriNetUnfolderBase]: 162/283 cut-off events. [2023-08-26 17:43:08,709 INFO L125 PetriNetUnfolderBase]: For 793/793 co-relation queries the response was YES. [2023-08-26 17:43:08,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1093 conditions, 283 events. 162/283 cut-off events. For 793/793 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 948 event pairs, 22 based on Foata normal form. 8/291 useless extension candidates. Maximal degree in co-relation 1077. Up to 77 conditions per place. [2023-08-26 17:43:08,711 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 38 selfloop transitions, 20 changer transitions 3/61 dead transitions. [2023-08-26 17:43:08,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 61 transitions, 499 flow [2023-08-26 17:43:08,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 17:43:08,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 17:43:08,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 526 transitions. [2023-08-26 17:43:08,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41878980891719747 [2023-08-26 17:43:08,714 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 526 transitions. [2023-08-26 17:43:08,714 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 526 transitions. [2023-08-26 17:43:08,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:43:08,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 526 transitions. [2023-08-26 17:43:08,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 65.75) internal successors, (526), 8 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:08,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 157.0) internal successors, (1413), 9 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:08,718 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 157.0) internal successors, (1413), 9 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:08,718 INFO L175 Difference]: Start difference. First operand has 45 places, 32 transitions, 253 flow. Second operand 8 states and 526 transitions. [2023-08-26 17:43:08,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 61 transitions, 499 flow [2023-08-26 17:43:08,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 61 transitions, 469 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-08-26 17:43:08,722 INFO L231 Difference]: Finished difference. Result has 54 places, 38 transitions, 346 flow [2023-08-26 17:43:08,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=346, PETRI_PLACES=54, PETRI_TRANSITIONS=38} [2023-08-26 17:43:08,723 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 32 predicate places. [2023-08-26 17:43:08,723 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 38 transitions, 346 flow [2023-08-26 17:43:08,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 61.666666666666664) internal successors, (370), 6 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:08,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:43:08,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:43:08,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 17:43:08,724 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:43:08,724 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:43:08,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1978408975, now seen corresponding path program 3 times [2023-08-26 17:43:08,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:43:08,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276393427] [2023-08-26 17:43:08,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:43:08,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:43:08,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:43:08,803 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 17:43:08,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:43:08,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276393427] [2023-08-26 17:43:08,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276393427] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:43:08,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:43:08,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 17:43:08,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141658830] [2023-08-26 17:43:08,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:43:08,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 17:43:08,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:43:08,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 17:43:08,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-26 17:43:08,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:43:08,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 38 transitions, 346 flow. Second operand has 6 states, 6 states have (on average 61.666666666666664) internal successors, (370), 6 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:08,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:43:08,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:43:08,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:43:08,917 INFO L124 PetriNetUnfolderBase]: 150/263 cut-off events. [2023-08-26 17:43:08,918 INFO L125 PetriNetUnfolderBase]: For 1223/1223 co-relation queries the response was YES. [2023-08-26 17:43:08,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1194 conditions, 263 events. 150/263 cut-off events. For 1223/1223 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 893 event pairs, 22 based on Foata normal form. 8/271 useless extension candidates. Maximal degree in co-relation 1174. Up to 65 conditions per place. [2023-08-26 17:43:08,920 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 30 selfloop transitions, 20 changer transitions 8/58 dead transitions. [2023-08-26 17:43:08,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 58 transitions, 568 flow [2023-08-26 17:43:08,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 17:43:08,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 17:43:08,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 460 transitions. [2023-08-26 17:43:08,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41856232939035487 [2023-08-26 17:43:08,922 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 460 transitions. [2023-08-26 17:43:08,922 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 460 transitions. [2023-08-26 17:43:08,922 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:43:08,922 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 460 transitions. [2023-08-26 17:43:08,923 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 65.71428571428571) internal successors, (460), 7 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:08,925 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 157.0) internal successors, (1256), 8 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:08,925 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 157.0) internal successors, (1256), 8 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:08,925 INFO L175 Difference]: Start difference. First operand has 54 places, 38 transitions, 346 flow. Second operand 7 states and 460 transitions. [2023-08-26 17:43:08,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 58 transitions, 568 flow [2023-08-26 17:43:08,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 58 transitions, 533 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-08-26 17:43:08,932 INFO L231 Difference]: Finished difference. Result has 59 places, 39 transitions, 390 flow [2023-08-26 17:43:08,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=390, PETRI_PLACES=59, PETRI_TRANSITIONS=39} [2023-08-26 17:43:08,933 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 37 predicate places. [2023-08-26 17:43:08,933 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 39 transitions, 390 flow [2023-08-26 17:43:08,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 61.666666666666664) internal successors, (370), 6 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:08,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:43:08,934 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:43:08,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 17:43:08,934 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:43:08,934 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:43:08,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1201164613, now seen corresponding path program 4 times [2023-08-26 17:43:08,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:43:08,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666236970] [2023-08-26 17:43:08,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:43:08,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:43:08,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:43:09,016 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 17:43:09,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:43:09,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666236970] [2023-08-26 17:43:09,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666236970] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:43:09,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907092060] [2023-08-26 17:43:09,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 17:43:09,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:43:09,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:43:09,021 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 17:43:09,069 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 17:43:09,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 17:43:09,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:43:09,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 17:43:09,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:43:09,248 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 17:43:09,248 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:43:09,340 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 17:43:09,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907092060] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:43:09,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:43:09,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-26 17:43:09,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693675915] [2023-08-26 17:43:09,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:43:09,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-26 17:43:09,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:43:09,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-26 17:43:09,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-08-26 17:43:09,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:43:09,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 39 transitions, 390 flow. Second operand has 12 states, 12 states have (on average 61.916666666666664) internal successors, (743), 12 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:09,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:43:09,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:43:09,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:43:09,593 INFO L124 PetriNetUnfolderBase]: 198/343 cut-off events. [2023-08-26 17:43:09,593 INFO L125 PetriNetUnfolderBase]: For 2136/2136 co-relation queries the response was YES. [2023-08-26 17:43:09,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1661 conditions, 343 events. 198/343 cut-off events. For 2136/2136 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1152 event pairs, 18 based on Foata normal form. 16/359 useless extension candidates. Maximal degree in co-relation 1639. Up to 87 conditions per place. [2023-08-26 17:43:09,596 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 34 selfloop transitions, 35 changer transitions 22/91 dead transitions. [2023-08-26 17:43:09,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 91 transitions, 948 flow [2023-08-26 17:43:09,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 17:43:09,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 17:43:09,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 914 transitions. [2023-08-26 17:43:09,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41583257506824384 [2023-08-26 17:43:09,600 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 914 transitions. [2023-08-26 17:43:09,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 914 transitions. [2023-08-26 17:43:09,600 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:43:09,600 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 914 transitions. [2023-08-26 17:43:09,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 65.28571428571429) internal successors, (914), 14 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:09,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 157.0) internal successors, (2355), 15 states have internal predecessors, (2355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:09,607 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 157.0) internal successors, (2355), 15 states have internal predecessors, (2355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:09,607 INFO L175 Difference]: Start difference. First operand has 59 places, 39 transitions, 390 flow. Second operand 14 states and 914 transitions. [2023-08-26 17:43:09,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 91 transitions, 948 flow [2023-08-26 17:43:09,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 91 transitions, 886 flow, removed 15 selfloop flow, removed 5 redundant places. [2023-08-26 17:43:09,615 INFO L231 Difference]: Finished difference. Result has 72 places, 55 transitions, 691 flow [2023-08-26 17:43:09,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=691, PETRI_PLACES=72, PETRI_TRANSITIONS=55} [2023-08-26 17:43:09,616 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 50 predicate places. [2023-08-26 17:43:09,617 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 55 transitions, 691 flow [2023-08-26 17:43:09,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 61.916666666666664) internal successors, (743), 12 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:09,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:43:09,617 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:43:09,629 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 17:43:09,823 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,SelfDestructingSolverStorable9 [2023-08-26 17:43:09,824 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:43:09,824 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:43:09,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1651254496, now seen corresponding path program 5 times [2023-08-26 17:43:09,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:43:09,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469045126] [2023-08-26 17:43:09,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:43:09,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:43:09,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:43:09,947 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 17:43:09,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:43:09,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469045126] [2023-08-26 17:43:09,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469045126] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:43:09,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141917715] [2023-08-26 17:43:09,948 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 17:43:09,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:43:09,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:43:09,949 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 17:43:09,952 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 17:43:10,017 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-26 17:43:10,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:43:10,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-26 17:43:10,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:43:10,064 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 17:43:10,064 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:43:10,213 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 17:43:10,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141917715] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:43:10,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:43:10,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-26 17:43:10,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926427792] [2023-08-26 17:43:10,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:43:10,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 17:43:10,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:43:10,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 17:43:10,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-08-26 17:43:10,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:43:10,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 55 transitions, 691 flow. Second operand has 16 states, 16 states have (on average 61.8125) internal successors, (989), 16 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:10,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:43:10,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:43:10,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:43:10,481 INFO L124 PetriNetUnfolderBase]: 254/455 cut-off events. [2023-08-26 17:43:10,481 INFO L125 PetriNetUnfolderBase]: For 4621/4621 co-relation queries the response was YES. [2023-08-26 17:43:10,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2438 conditions, 455 events. 254/455 cut-off events. For 4621/4621 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1589 event pairs, 55 based on Foata normal form. 32/487 useless extension candidates. Maximal degree in co-relation 2411. Up to 249 conditions per place. [2023-08-26 17:43:10,485 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 65 selfloop transitions, 25 changer transitions 27/117 dead transitions. [2023-08-26 17:43:10,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 117 transitions, 1457 flow [2023-08-26 17:43:10,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-26 17:43:10,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-26 17:43:10,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1043 transitions. [2023-08-26 17:43:10,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41520700636942676 [2023-08-26 17:43:10,489 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1043 transitions. [2023-08-26 17:43:10,489 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1043 transitions. [2023-08-26 17:43:10,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:43:10,490 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1043 transitions. [2023-08-26 17:43:10,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 65.1875) internal successors, (1043), 16 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:10,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 157.0) internal successors, (2669), 17 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:10,497 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 157.0) internal successors, (2669), 17 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:10,497 INFO L175 Difference]: Start difference. First operand has 72 places, 55 transitions, 691 flow. Second operand 16 states and 1043 transitions. [2023-08-26 17:43:10,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 117 transitions, 1457 flow [2023-08-26 17:43:10,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 117 transitions, 1096 flow, removed 167 selfloop flow, removed 5 redundant places. [2023-08-26 17:43:10,511 INFO L231 Difference]: Finished difference. Result has 92 places, 69 transitions, 764 flow [2023-08-26 17:43:10,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=764, PETRI_PLACES=92, PETRI_TRANSITIONS=69} [2023-08-26 17:43:10,512 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 70 predicate places. [2023-08-26 17:43:10,512 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 69 transitions, 764 flow [2023-08-26 17:43:10,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 61.8125) internal successors, (989), 16 states have internal predecessors, (989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:10,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:43:10,512 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:43:10,521 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 17:43:10,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-26 17:43:10,718 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:43:10,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:43:10,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1714670042, now seen corresponding path program 6 times [2023-08-26 17:43:10,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:43:10,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413856947] [2023-08-26 17:43:10,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:43:10,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:43:10,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:43:10,878 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 17:43:10,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:43:10,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413856947] [2023-08-26 17:43:10,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413856947] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:43:10,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126549365] [2023-08-26 17:43:10,879 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 17:43:10,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:43:10,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:43:10,880 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 17:43:10,882 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 17:43:10,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-26 17:43:10,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:43:10,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-26 17:43:10,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:43:11,028 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 17:43:11,028 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:43:11,171 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 17:43:11,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126549365] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:43:11,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:43:11,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-26 17:43:11,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759903370] [2023-08-26 17:43:11,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:43:11,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-26 17:43:11,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:43:11,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-26 17:43:11,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-08-26 17:43:11,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:43:11,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 69 transitions, 764 flow. Second operand has 17 states, 17 states have (on average 61.8235294117647) internal successors, (1051), 17 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:11,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:43:11,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:43:11,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:43:11,650 INFO L124 PetriNetUnfolderBase]: 408/747 cut-off events. [2023-08-26 17:43:11,650 INFO L125 PetriNetUnfolderBase]: For 12685/12685 co-relation queries the response was YES. [2023-08-26 17:43:11,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4034 conditions, 747 events. 408/747 cut-off events. For 12685/12685 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3273 event pairs, 44 based on Foata normal form. 32/779 useless extension candidates. Maximal degree in co-relation 3998. Up to 227 conditions per place. [2023-08-26 17:43:11,657 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 73 selfloop transitions, 71 changer transitions 37/181 dead transitions. [2023-08-26 17:43:11,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 181 transitions, 2080 flow [2023-08-26 17:43:11,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-26 17:43:11,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-26 17:43:11,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1434 transitions. [2023-08-26 17:43:11,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4151708164447018 [2023-08-26 17:43:11,662 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1434 transitions. [2023-08-26 17:43:11,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1434 transitions. [2023-08-26 17:43:11,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:43:11,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1434 transitions. [2023-08-26 17:43:11,667 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 65.18181818181819) internal successors, (1434), 22 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:11,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 157.0) internal successors, (3611), 23 states have internal predecessors, (3611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:11,673 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 157.0) internal successors, (3611), 23 states have internal predecessors, (3611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:11,673 INFO L175 Difference]: Start difference. First operand has 92 places, 69 transitions, 764 flow. Second operand 22 states and 1434 transitions. [2023-08-26 17:43:11,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 181 transitions, 2080 flow [2023-08-26 17:43:11,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 181 transitions, 1988 flow, removed 38 selfloop flow, removed 4 redundant places. [2023-08-26 17:43:11,729 INFO L231 Difference]: Finished difference. Result has 123 places, 107 transitions, 1491 flow [2023-08-26 17:43:11,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1491, PETRI_PLACES=123, PETRI_TRANSITIONS=107} [2023-08-26 17:43:11,730 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 101 predicate places. [2023-08-26 17:43:11,730 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 107 transitions, 1491 flow [2023-08-26 17:43:11,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 61.8235294117647) internal successors, (1051), 17 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:11,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:43:11,731 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:43:11,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-26 17:43:11,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:43:11,937 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:43:11,937 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:43:11,937 INFO L85 PathProgramCache]: Analyzing trace with hash -2039594720, now seen corresponding path program 7 times [2023-08-26 17:43:11,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:43:11,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224997700] [2023-08-26 17:43:11,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:43:11,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:43:11,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:43:12,048 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 17:43:12,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:43:12,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224997700] [2023-08-26 17:43:12,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224997700] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:43:12,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91454001] [2023-08-26 17:43:12,049 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 17:43:12,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:43:12,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:43:12,050 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 17:43:12,077 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 17:43:12,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:43:12,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-26 17:43:12,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:43:12,171 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 17:43:12,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:43:12,274 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 17:43:12,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91454001] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:43:12,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:43:12,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-26 17:43:12,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884475786] [2023-08-26 17:43:12,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:43:12,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-26 17:43:12,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:43:12,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-26 17:43:12,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2023-08-26 17:43:12,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:43:12,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 107 transitions, 1491 flow. Second operand has 17 states, 17 states have (on average 61.76470588235294) internal successors, (1050), 17 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:12,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:43:12,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:43:12,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:43:12,960 INFO L124 PetriNetUnfolderBase]: 572/1027 cut-off events. [2023-08-26 17:43:12,960 INFO L125 PetriNetUnfolderBase]: For 34175/34175 co-relation queries the response was YES. [2023-08-26 17:43:12,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7293 conditions, 1027 events. 572/1027 cut-off events. For 34175/34175 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4751 event pairs, 20 based on Foata normal form. 32/1059 useless extension candidates. Maximal degree in co-relation 7242. Up to 327 conditions per place. [2023-08-26 17:43:12,972 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 61 selfloop transitions, 127 changer transitions 48/236 dead transitions. [2023-08-26 17:43:12,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 236 transitions, 3639 flow [2023-08-26 17:43:12,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-26 17:43:12,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-26 17:43:12,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1760 transitions. [2023-08-26 17:43:12,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4151922623260203 [2023-08-26 17:43:12,977 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1760 transitions. [2023-08-26 17:43:12,977 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1760 transitions. [2023-08-26 17:43:12,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:43:12,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1760 transitions. [2023-08-26 17:43:12,982 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 65.18518518518519) internal successors, (1760), 27 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:12,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 157.0) internal successors, (4396), 28 states have internal predecessors, (4396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:12,989 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 157.0) internal successors, (4396), 28 states have internal predecessors, (4396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:12,989 INFO L175 Difference]: Start difference. First operand has 123 places, 107 transitions, 1491 flow. Second operand 27 states and 1760 transitions. [2023-08-26 17:43:12,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 236 transitions, 3639 flow [2023-08-26 17:43:13,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 236 transitions, 3315 flow, removed 148 selfloop flow, removed 7 redundant places. [2023-08-26 17:43:13,061 INFO L231 Difference]: Finished difference. Result has 157 places, 149 transitions, 2482 flow [2023-08-26 17:43:13,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=1243, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2482, PETRI_PLACES=157, PETRI_TRANSITIONS=149} [2023-08-26 17:43:13,062 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 135 predicate places. [2023-08-26 17:43:13,062 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 149 transitions, 2482 flow [2023-08-26 17:43:13,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 61.76470588235294) internal successors, (1050), 17 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:13,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:43:13,063 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:43:13,071 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 17:43:13,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:43:13,269 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:43:13,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:43:13,269 INFO L85 PathProgramCache]: Analyzing trace with hash 531927744, now seen corresponding path program 8 times [2023-08-26 17:43:13,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:43:13,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002902465] [2023-08-26 17:43:13,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:43:13,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:43:13,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:43:13,419 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:43:13,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:43:13,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002902465] [2023-08-26 17:43:13,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002902465] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:43:13,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554476776] [2023-08-26 17:43:13,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 17:43:13,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:43:13,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:43:13,421 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 17:43:13,443 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 17:43:13,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 17:43:13,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:43:13,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2023-08-26 17:43:13,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:43:13,538 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:43:13,538 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:43:13,689 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:43:13,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554476776] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:43:13,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:43:13,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2023-08-26 17:43:13,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999373567] [2023-08-26 17:43:13,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:43:13,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-26 17:43:13,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:43:13,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-26 17:43:13,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=454, Unknown=0, NotChecked=0, Total=600 [2023-08-26 17:43:13,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:43:13,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 149 transitions, 2482 flow. Second operand has 25 states, 25 states have (on average 61.44) internal successors, (1536), 25 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:13,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:43:13,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:43:13,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:43:14,753 INFO L124 PetriNetUnfolderBase]: 804/1427 cut-off events. [2023-08-26 17:43:14,755 INFO L125 PetriNetUnfolderBase]: For 82529/82529 co-relation queries the response was YES. [2023-08-26 17:43:14,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13182 conditions, 1427 events. 804/1427 cut-off events. For 82529/82529 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 6494 event pairs, 18 based on Foata normal form. 40/1467 useless extension candidates. Maximal degree in co-relation 13116. Up to 482 conditions per place. [2023-08-26 17:43:14,775 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 71 selfloop transitions, 184 changer transitions 74/329 dead transitions. [2023-08-26 17:43:14,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 329 transitions, 6811 flow [2023-08-26 17:43:14,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-26 17:43:14,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-26 17:43:14,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2601 transitions. [2023-08-26 17:43:14,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.414171974522293 [2023-08-26 17:43:14,782 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2601 transitions. [2023-08-26 17:43:14,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2601 transitions. [2023-08-26 17:43:14,785 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:43:14,786 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2601 transitions. [2023-08-26 17:43:14,792 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 65.025) internal successors, (2601), 40 states have internal predecessors, (2601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:14,800 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 157.0) internal successors, (6437), 41 states have internal predecessors, (6437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:14,802 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 157.0) internal successors, (6437), 41 states have internal predecessors, (6437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:14,802 INFO L175 Difference]: Start difference. First operand has 157 places, 149 transitions, 2482 flow. Second operand 40 states and 2601 transitions. [2023-08-26 17:43:14,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 329 transitions, 6811 flow [2023-08-26 17:43:15,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 329 transitions, 5291 flow, removed 737 selfloop flow, removed 10 redundant places. [2023-08-26 17:43:15,034 INFO L231 Difference]: Finished difference. Result has 206 places, 210 transitions, 3702 flow [2023-08-26 17:43:15,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=1914, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=3702, PETRI_PLACES=206, PETRI_TRANSITIONS=210} [2023-08-26 17:43:15,035 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 184 predicate places. [2023-08-26 17:43:15,035 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 210 transitions, 3702 flow [2023-08-26 17:43:15,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 61.44) internal successors, (1536), 25 states have internal predecessors, (1536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:15,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:43:15,036 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:43:15,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-26 17:43:15,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-26 17:43:15,242 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:43:15,242 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:43:15,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1284745536, now seen corresponding path program 9 times [2023-08-26 17:43:15,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:43:15,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578231799] [2023-08-26 17:43:15,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:43:15,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:43:15,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:43:15,631 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 17:43:15,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:43:15,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578231799] [2023-08-26 17:43:15,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578231799] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:43:15,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070105446] [2023-08-26 17:43:15,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 17:43:15,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:43:15,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:43:15,633 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 17:43:15,639 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 17:43:15,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-08-26 17:43:15,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:43:15,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-26 17:43:15,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:43:15,801 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 17:43:15,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:43:16,309 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 17:43:16,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070105446] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:43:16,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:43:16,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 38 [2023-08-26 17:43:16,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389083699] [2023-08-26 17:43:16,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:43:16,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-26 17:43:16,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:43:16,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-26 17:43:16,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1165, Unknown=0, NotChecked=0, Total=1560 [2023-08-26 17:43:16,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:43:16,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 210 transitions, 3702 flow. Second operand has 40 states, 40 states have (on average 61.3) internal successors, (2452), 40 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:16,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:43:16,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:43:16,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:43:17,672 INFO L124 PetriNetUnfolderBase]: 924/1667 cut-off events. [2023-08-26 17:43:17,672 INFO L125 PetriNetUnfolderBase]: For 143871/143871 co-relation queries the response was YES. [2023-08-26 17:43:17,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17433 conditions, 1667 events. 924/1667 cut-off events. For 143871/143871 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 7445 event pairs, 265 based on Foata normal form. 80/1747 useless extension candidates. Maximal degree in co-relation 17348. Up to 1189 conditions per place. [2023-08-26 17:43:17,695 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 227 selfloop transitions, 59 changer transitions 75/361 dead transitions. [2023-08-26 17:43:17,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 361 transitions, 8286 flow [2023-08-26 17:43:17,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-26 17:43:17,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-26 17:43:17,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 2591 transitions. [2023-08-26 17:43:17,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4125796178343949 [2023-08-26 17:43:17,700 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 2591 transitions. [2023-08-26 17:43:17,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 2591 transitions. [2023-08-26 17:43:17,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:43:17,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 2591 transitions. [2023-08-26 17:43:17,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 64.775) internal successors, (2591), 40 states have internal predecessors, (2591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:17,712 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 157.0) internal successors, (6437), 41 states have internal predecessors, (6437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:17,714 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 157.0) internal successors, (6437), 41 states have internal predecessors, (6437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:17,714 INFO L175 Difference]: Start difference. First operand has 206 places, 210 transitions, 3702 flow. Second operand 40 states and 2591 transitions. [2023-08-26 17:43:17,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 361 transitions, 8286 flow [2023-08-26 17:43:18,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 361 transitions, 7002 flow, removed 614 selfloop flow, removed 8 redundant places. [2023-08-26 17:43:18,054 INFO L231 Difference]: Finished difference. Result has 259 places, 240 transitions, 4411 flow [2023-08-26 17:43:18,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=2902, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=4411, PETRI_PLACES=259, PETRI_TRANSITIONS=240} [2023-08-26 17:43:18,055 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 237 predicate places. [2023-08-26 17:43:18,055 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 240 transitions, 4411 flow [2023-08-26 17:43:18,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 61.3) internal successors, (2452), 40 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:18,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:43:18,062 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:43:18,073 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 17:43:18,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-26 17:43:18,268 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:43:18,269 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:43:18,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1597374854, now seen corresponding path program 10 times [2023-08-26 17:43:18,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:43:18,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360043635] [2023-08-26 17:43:18,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:43:18,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:43:18,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:43:18,656 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 17:43:18,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:43:18,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360043635] [2023-08-26 17:43:18,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360043635] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:43:18,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454227712] [2023-08-26 17:43:18,657 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 17:43:18,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:43:18,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:43:18,658 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 17:43:18,660 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 17:43:18,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 17:43:18,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:43:18,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-26 17:43:18,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:43:18,816 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 17:43:18,817 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:43:19,392 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 17:43:19,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454227712] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:43:19,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:43:19,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 39 [2023-08-26 17:43:19,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139654185] [2023-08-26 17:43:19,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:43:19,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-08-26 17:43:19,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:43:19,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-08-26 17:43:19,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=1274, Unknown=0, NotChecked=0, Total=1640 [2023-08-26 17:43:19,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:43:19,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 240 transitions, 4411 flow. Second operand has 41 states, 41 states have (on average 61.31707317073171) internal successors, (2514), 41 states have internal predecessors, (2514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:19,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:43:19,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:43:19,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:43:21,065 INFO L124 PetriNetUnfolderBase]: 1204/2227 cut-off events. [2023-08-26 17:43:21,065 INFO L125 PetriNetUnfolderBase]: For 366916/366916 co-relation queries the response was YES. [2023-08-26 17:43:21,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27305 conditions, 2227 events. 1204/2227 cut-off events. For 366916/366916 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 10760 event pairs, 166 based on Foata normal form. 80/2307 useless extension candidates. Maximal degree in co-relation 27197. Up to 878 conditions per place. [2023-08-26 17:43:21,114 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 188 selfloop transitions, 184 changer transitions 87/459 dead transitions. [2023-08-26 17:43:21,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 459 transitions, 10646 flow [2023-08-26 17:43:21,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-08-26 17:43:21,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-08-26 17:43:21,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2982 transitions. [2023-08-26 17:43:21,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4129050124619219 [2023-08-26 17:43:21,122 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2982 transitions. [2023-08-26 17:43:21,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2982 transitions. [2023-08-26 17:43:21,123 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:43:21,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2982 transitions. [2023-08-26 17:43:21,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 64.82608695652173) internal successors, (2982), 46 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:21,138 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 157.0) internal successors, (7379), 47 states have internal predecessors, (7379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:21,140 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 157.0) internal successors, (7379), 47 states have internal predecessors, (7379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:21,140 INFO L175 Difference]: Start difference. First operand has 259 places, 240 transitions, 4411 flow. Second operand 46 states and 2982 transitions. [2023-08-26 17:43:21,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 459 transitions, 10646 flow [2023-08-26 17:43:21,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 459 transitions, 9511 flow, removed 542 selfloop flow, removed 14 redundant places. [2023-08-26 17:43:21,918 INFO L231 Difference]: Finished difference. Result has 310 places, 309 transitions, 6133 flow [2023-08-26 17:43:21,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=3276, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=6133, PETRI_PLACES=310, PETRI_TRANSITIONS=309} [2023-08-26 17:43:21,919 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 288 predicate places. [2023-08-26 17:43:21,919 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 309 transitions, 6133 flow [2023-08-26 17:43:21,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 61.31707317073171) internal successors, (2514), 41 states have internal predecessors, (2514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:21,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:43:21,920 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:43:21,926 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 17:43:22,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:43:22,126 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:43:22,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:43:22,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1353794988, now seen corresponding path program 11 times [2023-08-26 17:43:22,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:43:22,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346281937] [2023-08-26 17:43:22,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:43:22,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:43:22,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:43:22,516 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 17:43:22,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:43:22,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346281937] [2023-08-26 17:43:22,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346281937] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:43:22,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379022688] [2023-08-26 17:43:22,517 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 17:43:22,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:43:22,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:43:22,518 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:43:22,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-26 17:43:22,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-08-26 17:43:22,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:43:22,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-26 17:43:22,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:43:22,696 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 17:43:22,696 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:43:23,141 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 17:43:23,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379022688] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:43:23,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:43:23,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 38 [2023-08-26 17:43:23,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862699892] [2023-08-26 17:43:23,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:43:23,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-26 17:43:23,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:43:23,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-26 17:43:23,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1243, Unknown=0, NotChecked=0, Total=1560 [2023-08-26 17:43:23,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:43:23,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 309 transitions, 6133 flow. Second operand has 40 states, 40 states have (on average 61.3) internal successors, (2452), 40 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:23,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:43:23,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:43:23,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:43:25,235 INFO L124 PetriNetUnfolderBase]: 1676/3171 cut-off events. [2023-08-26 17:43:25,236 INFO L125 PetriNetUnfolderBase]: For 854753/854753 co-relation queries the response was YES. [2023-08-26 17:43:25,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47189 conditions, 3171 events. 1676/3171 cut-off events. For 854753/854753 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 17294 event pairs, 104 based on Foata normal form. 80/3251 useless extension candidates. Maximal degree in co-relation 47060. Up to 1334 conditions per place. [2023-08-26 17:43:25,292 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 143 selfloop transitions, 357 changer transitions 97/597 dead transitions. [2023-08-26 17:43:25,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 597 transitions, 15748 flow [2023-08-26 17:43:25,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-08-26 17:43:25,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-08-26 17:43:25,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 3306 transitions. [2023-08-26 17:43:25,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41288872236792806 [2023-08-26 17:43:25,297 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 3306 transitions. [2023-08-26 17:43:25,297 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 3306 transitions. [2023-08-26 17:43:25,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:43:25,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 3306 transitions. [2023-08-26 17:43:25,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 64.82352941176471) internal successors, (3306), 51 states have internal predecessors, (3306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:25,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 157.0) internal successors, (8164), 52 states have internal predecessors, (8164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:25,316 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 157.0) internal successors, (8164), 52 states have internal predecessors, (8164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:25,316 INFO L175 Difference]: Start difference. First operand has 310 places, 309 transitions, 6133 flow. Second operand 51 states and 3306 transitions. [2023-08-26 17:43:25,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 597 transitions, 15748 flow [2023-08-26 17:43:27,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 597 transitions, 13798 flow, removed 936 selfloop flow, removed 14 redundant places. [2023-08-26 17:43:27,025 INFO L231 Difference]: Finished difference. Result has 370 places, 432 transitions, 9426 flow [2023-08-26 17:43:27,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=4607, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=252, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=9426, PETRI_PLACES=370, PETRI_TRANSITIONS=432} [2023-08-26 17:43:27,026 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 348 predicate places. [2023-08-26 17:43:27,026 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 432 transitions, 9426 flow [2023-08-26 17:43:27,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 61.3) internal successors, (2452), 40 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:27,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:43:27,027 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:43:27,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-26 17:43:27,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-26 17:43:27,228 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:43:27,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:43:27,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1082960604, now seen corresponding path program 12 times [2023-08-26 17:43:27,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:43:27,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391311333] [2023-08-26 17:43:27,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:43:27,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:43:27,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:43:27,524 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 17:43:27,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:43:27,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391311333] [2023-08-26 17:43:27,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391311333] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:43:27,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116311897] [2023-08-26 17:43:27,524 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 17:43:27,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:43:27,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:43:27,525 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:43:27,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-26 17:43:27,604 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-08-26 17:43:27,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:43:27,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-26 17:43:27,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:43:27,658 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 17:43:27,658 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:43:28,032 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 17:43:28,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116311897] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:43:28,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:43:28,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 38 [2023-08-26 17:43:28,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784306693] [2023-08-26 17:43:28,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:43:28,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-26 17:43:28,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:43:28,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-26 17:43:28,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1270, Unknown=0, NotChecked=0, Total=1560 [2023-08-26 17:43:28,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:43:28,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 432 transitions, 9426 flow. Second operand has 40 states, 40 states have (on average 61.3) internal successors, (2452), 40 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:28,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:43:28,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:43:28,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:43:30,693 INFO L124 PetriNetUnfolderBase]: 2260/4231 cut-off events. [2023-08-26 17:43:30,694 INFO L125 PetriNetUnfolderBase]: For 1746517/1746517 co-relation queries the response was YES. [2023-08-26 17:43:30,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76478 conditions, 4231 events. 2260/4231 cut-off events. For 1746517/1746517 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 24453 event pairs, 38 based on Foata normal form. 80/4311 useless extension candidates. Maximal degree in co-relation 76324. Up to 1810 conditions per place. [2023-08-26 17:43:30,758 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 128 selfloop transitions, 540 changer transitions 101/769 dead transitions. [2023-08-26 17:43:30,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 769 transitions, 23519 flow [2023-08-26 17:43:30,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-08-26 17:43:30,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2023-08-26 17:43:30,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 4087 transitions. [2023-08-26 17:43:30,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4132039227580629 [2023-08-26 17:43:30,765 INFO L72 ComplementDD]: Start complementDD. Operand 63 states and 4087 transitions. [2023-08-26 17:43:30,765 INFO L73 IsDeterministic]: Start isDeterministic. Operand 63 states and 4087 transitions. [2023-08-26 17:43:30,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:43:30,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 63 states and 4087 transitions. [2023-08-26 17:43:30,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 64 states, 63 states have (on average 64.87301587301587) internal successors, (4087), 63 states have internal predecessors, (4087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:30,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 64 states, 64 states have (on average 157.0) internal successors, (10048), 64 states have internal predecessors, (10048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:30,862 INFO L81 ComplementDD]: Finished complementDD. Result has 64 states, 64 states have (on average 157.0) internal successors, (10048), 64 states have internal predecessors, (10048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:30,862 INFO L175 Difference]: Start difference. First operand has 370 places, 432 transitions, 9426 flow. Second operand 63 states and 4087 transitions. [2023-08-26 17:43:30,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 769 transitions, 23519 flow [2023-08-26 17:43:34,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 769 transitions, 18564 flow, removed 2402 selfloop flow, removed 17 redundant places. [2023-08-26 17:43:34,204 INFO L231 Difference]: Finished difference. Result has 446 places, 572 transitions, 12883 flow [2023-08-26 17:43:34,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=6883, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=404, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=63, PETRI_FLOW=12883, PETRI_PLACES=446, PETRI_TRANSITIONS=572} [2023-08-26 17:43:34,205 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 424 predicate places. [2023-08-26 17:43:34,205 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 572 transitions, 12883 flow [2023-08-26 17:43:34,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 61.3) internal successors, (2452), 40 states have internal predecessors, (2452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:34,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:43:34,205 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:43:34,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-26 17:43:34,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-26 17:43:34,406 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:43:34,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:43:34,406 INFO L85 PathProgramCache]: Analyzing trace with hash 873153844, now seen corresponding path program 13 times [2023-08-26 17:43:34,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:43:34,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626834455] [2023-08-26 17:43:34,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:43:34,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:43:34,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:43:34,729 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 17:43:34,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:43:34,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626834455] [2023-08-26 17:43:34,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626834455] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:43:34,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287610098] [2023-08-26 17:43:34,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 17:43:34,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:43:34,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:43:34,733 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:43:34,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-26 17:43:34,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:43:34,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-26 17:43:34,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:43:34,879 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 17:43:34,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:43:35,281 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 17:43:35,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287610098] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:43:35,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:43:35,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 41 [2023-08-26 17:43:35,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959588654] [2023-08-26 17:43:35,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:43:35,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-26 17:43:35,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:43:35,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-26 17:43:35,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=430, Invalid=1376, Unknown=0, NotChecked=0, Total=1806 [2023-08-26 17:43:35,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:43:35,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 572 transitions, 12883 flow. Second operand has 43 states, 43 states have (on average 61.30232558139535) internal successors, (2636), 43 states have internal predecessors, (2636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:35,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:43:35,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:43:35,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:43:39,191 INFO L124 PetriNetUnfolderBase]: 2668/4975 cut-off events. [2023-08-26 17:43:39,191 INFO L125 PetriNetUnfolderBase]: For 2207245/2207245 co-relation queries the response was YES. [2023-08-26 17:43:39,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98997 conditions, 4975 events. 2668/4975 cut-off events. For 2207245/2207245 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 28592 event pairs, 12 based on Foata normal form. 84/5059 useless extension candidates. Maximal degree in co-relation 98812. Up to 2134 conditions per place. [2023-08-26 17:43:39,274 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 116 selfloop transitions, 654 changer transitions 148/918 dead transitions. [2023-08-26 17:43:39,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 918 transitions, 33808 flow [2023-08-26 17:43:39,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-08-26 17:43:39,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2023-08-26 17:43:39,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 4997 transitions. [2023-08-26 17:43:39,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41335098022996114 [2023-08-26 17:43:39,280 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 4997 transitions. [2023-08-26 17:43:39,280 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 4997 transitions. [2023-08-26 17:43:39,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:43:39,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 4997 transitions. [2023-08-26 17:43:39,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 64.8961038961039) internal successors, (4997), 77 states have internal predecessors, (4997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:39,297 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 157.0) internal successors, (12246), 78 states have internal predecessors, (12246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:39,298 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 157.0) internal successors, (12246), 78 states have internal predecessors, (12246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:39,298 INFO L175 Difference]: Start difference. First operand has 446 places, 572 transitions, 12883 flow. Second operand 77 states and 4997 transitions. [2023-08-26 17:43:39,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 918 transitions, 33808 flow [2023-08-26 17:43:43,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 918 transitions, 26284 flow, removed 3565 selfloop flow, removed 25 redundant places. [2023-08-26 17:43:43,891 INFO L231 Difference]: Finished difference. Result has 535 places, 685 transitions, 17097 flow [2023-08-26 17:43:43,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=9387, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=542, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=17097, PETRI_PLACES=535, PETRI_TRANSITIONS=685} [2023-08-26 17:43:43,892 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 513 predicate places. [2023-08-26 17:43:43,892 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 685 transitions, 17097 flow [2023-08-26 17:43:43,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 61.30232558139535) internal successors, (2636), 43 states have internal predecessors, (2636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:43,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:43:43,893 INFO L208 CegarLoopForPetriNet]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:43:43,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-26 17:43:44,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:43:44,094 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:43:44,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:43:44,094 INFO L85 PathProgramCache]: Analyzing trace with hash 820988070, now seen corresponding path program 14 times [2023-08-26 17:43:44,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:43:44,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084188042] [2023-08-26 17:43:44,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:43:44,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:43:44,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:43:44,875 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:43:44,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:43:44,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084188042] [2023-08-26 17:43:44,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084188042] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:43:44,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705504282] [2023-08-26 17:43:44,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 17:43:44,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:43:44,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:43:44,878 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:43:44,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-26 17:43:44,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 17:43:44,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:43:44,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-26 17:43:44,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:43:45,082 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:43:45,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:43:45,838 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:43:45,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705504282] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:43:45,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:43:45,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 76 [2023-08-26 17:43:45,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923570191] [2023-08-26 17:43:45,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:43:45,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2023-08-26 17:43:45,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:43:45,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2023-08-26 17:43:45,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1428, Invalid=4578, Unknown=0, NotChecked=0, Total=6006 [2023-08-26 17:43:45,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:43:45,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 685 transitions, 17097 flow. Second operand has 78 states, 78 states have (on average 61.14102564102564) internal successors, (4769), 78 states have internal predecessors, (4769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:45,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:43:45,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:43:45,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:43:50,929 INFO L124 PetriNetUnfolderBase]: 2924/5403 cut-off events. [2023-08-26 17:43:50,930 INFO L125 PetriNetUnfolderBase]: For 3492878/3492878 co-relation queries the response was YES. [2023-08-26 17:43:51,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125724 conditions, 5403 events. 2924/5403 cut-off events. For 3492878/3492878 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 30710 event pairs, 18 based on Foata normal form. 28/5431 useless extension candidates. Maximal degree in co-relation 125501. Up to 2282 conditions per place. [2023-08-26 17:43:51,042 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 133 selfloop transitions, 718 changer transitions 170/1021 dead transitions. [2023-08-26 17:43:51,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 622 places, 1021 transitions, 39354 flow [2023-08-26 17:43:51,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-08-26 17:43:51,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2023-08-26 17:43:51,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 5694 transitions. [2023-08-26 17:43:51,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121308627678054 [2023-08-26 17:43:51,052 INFO L72 ComplementDD]: Start complementDD. Operand 88 states and 5694 transitions. [2023-08-26 17:43:51,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 88 states and 5694 transitions. [2023-08-26 17:43:51,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:43:51,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 88 states and 5694 transitions. [2023-08-26 17:43:51,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 89 states, 88 states have (on average 64.70454545454545) internal successors, (5694), 88 states have internal predecessors, (5694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:51,075 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 89 states, 89 states have (on average 157.0) internal successors, (13973), 89 states have internal predecessors, (13973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:51,077 INFO L81 ComplementDD]: Finished complementDD. Result has 89 states, 89 states have (on average 157.0) internal successors, (13973), 89 states have internal predecessors, (13973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:51,077 INFO L175 Difference]: Start difference. First operand has 535 places, 685 transitions, 17097 flow. Second operand 88 states and 5694 transitions. [2023-08-26 17:43:51,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 622 places, 1021 transitions, 39354 flow [2023-08-26 17:43:58,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 602 places, 1021 transitions, 30268 flow, removed 4395 selfloop flow, removed 20 redundant places. [2023-08-26 17:43:58,704 INFO L231 Difference]: Finished difference. Result has 616 places, 749 transitions, 16363 flow [2023-08-26 17:43:58,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=11913, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=685, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=655, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=88, PETRI_FLOW=16363, PETRI_PLACES=616, PETRI_TRANSITIONS=749} [2023-08-26 17:43:58,705 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 594 predicate places. [2023-08-26 17:43:58,705 INFO L495 AbstractCegarLoop]: Abstraction has has 616 places, 749 transitions, 16363 flow [2023-08-26 17:43:58,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 61.14102564102564) internal successors, (4769), 78 states have internal predecessors, (4769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:58,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:43:58,706 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:43:58,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-26 17:43:58,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:43:58,907 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:43:58,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:43:58,907 INFO L85 PathProgramCache]: Analyzing trace with hash 424850496, now seen corresponding path program 15 times [2023-08-26 17:43:58,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:43:58,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323613453] [2023-08-26 17:43:58,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:43:58,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:43:58,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:43:59,929 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:43:59,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:43:59,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323613453] [2023-08-26 17:43:59,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323613453] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:43:59,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448595179] [2023-08-26 17:43:59,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 17:43:59,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:43:59,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:43:59,930 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:43:59,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-26 17:44:00,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2023-08-26 17:44:00,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:44:00,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-26 17:44:00,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:44:00,174 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:44:00,174 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:44:00,912 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:44:00,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448595179] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:44:00,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:44:00,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 42 [2023-08-26 17:44:00,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106199422] [2023-08-26 17:44:00,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:44:00,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-26 17:44:00,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:44:00,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-26 17:44:00,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=466, Invalid=1426, Unknown=0, NotChecked=0, Total=1892 [2023-08-26 17:44:00,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:44:00,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 616 places, 749 transitions, 16363 flow. Second operand has 44 states, 44 states have (on average 61.09090909090909) internal successors, (2688), 44 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:44:00,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:44:00,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:44:00,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:44:04,603 INFO L124 PetriNetUnfolderBase]: 2972/5499 cut-off events. [2023-08-26 17:44:04,603 INFO L125 PetriNetUnfolderBase]: For 3980712/3980712 co-relation queries the response was YES. [2023-08-26 17:44:04,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127450 conditions, 5499 events. 2972/5499 cut-off events. For 3980712/3980712 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 31832 event pairs, 1024 based on Foata normal form. 8/5507 useless extension candidates. Maximal degree in co-relation 127212. Up to 4249 conditions per place. [2023-08-26 17:44:04,791 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 659 selfloop transitions, 153 changer transitions 87/899 dead transitions. [2023-08-26 17:44:04,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 661 places, 899 transitions, 26869 flow [2023-08-26 17:44:04,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-08-26 17:44:04,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-08-26 17:44:04,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2957 transitions. [2023-08-26 17:44:04,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4094433674882304 [2023-08-26 17:44:04,796 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2957 transitions. [2023-08-26 17:44:04,796 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2957 transitions. [2023-08-26 17:44:04,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:44:04,797 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2957 transitions. [2023-08-26 17:44:04,800 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 64.28260869565217) internal successors, (2957), 46 states have internal predecessors, (2957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:44:04,804 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 157.0) internal successors, (7379), 47 states have internal predecessors, (7379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:44:04,805 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 157.0) internal successors, (7379), 47 states have internal predecessors, (7379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:44:04,805 INFO L175 Difference]: Start difference. First operand has 616 places, 749 transitions, 16363 flow. Second operand 46 states and 2957 transitions. [2023-08-26 17:44:04,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 661 places, 899 transitions, 26869 flow [2023-08-26 17:44:11,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 627 places, 899 transitions, 23042 flow, removed 1674 selfloop flow, removed 34 redundant places. [2023-08-26 17:44:11,712 INFO L231 Difference]: Finished difference. Result has 635 places, 761 transitions, 14328 flow [2023-08-26 17:44:11,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=13488, PETRI_DIFFERENCE_MINUEND_PLACES=582, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=14328, PETRI_PLACES=635, PETRI_TRANSITIONS=761} [2023-08-26 17:44:11,713 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 613 predicate places. [2023-08-26 17:44:11,713 INFO L495 AbstractCegarLoop]: Abstraction has has 635 places, 761 transitions, 14328 flow [2023-08-26 17:44:11,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 61.09090909090909) internal successors, (2688), 44 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:44:11,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:44:11,714 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:44:11,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-08-26 17:44:11,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-08-26 17:44:11,914 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:44:11,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:44:11,915 INFO L85 PathProgramCache]: Analyzing trace with hash -2062765490, now seen corresponding path program 16 times [2023-08-26 17:44:11,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:44:11,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106120546] [2023-08-26 17:44:11,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:44:11,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:44:11,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:44:12,917 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:44:12,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:44:12,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106120546] [2023-08-26 17:44:12,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106120546] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:44:12,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762706694] [2023-08-26 17:44:12,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 17:44:12,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:44:12,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:44:12,919 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:44:12,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-26 17:44:13,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 17:44:13,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:44:13,012 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-26 17:44:13,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:44:13,137 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:44:13,137 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:44:13,835 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:44:13,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762706694] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:44:13,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:44:13,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 42 [2023-08-26 17:44:13,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021496336] [2023-08-26 17:44:13,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:44:13,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-26 17:44:13,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:44:13,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-26 17:44:13,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=1494, Unknown=0, NotChecked=0, Total=1892 [2023-08-26 17:44:13,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:44:13,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 635 places, 761 transitions, 14328 flow. Second operand has 44 states, 44 states have (on average 61.09090909090909) internal successors, (2688), 44 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:44:13,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:44:13,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:44:13,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:44:17,713 INFO L124 PetriNetUnfolderBase]: 3076/5707 cut-off events. [2023-08-26 17:44:17,713 INFO L125 PetriNetUnfolderBase]: For 4271495/4271495 co-relation queries the response was YES. [2023-08-26 17:44:17,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130763 conditions, 5707 events. 3076/5707 cut-off events. For 4271495/4271495 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 33122 event pairs, 640 based on Foata normal form. 8/5715 useless extension candidates. Maximal degree in co-relation 130516. Up to 2773 conditions per place. [2023-08-26 17:44:17,827 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 466 selfloop transitions, 374 changer transitions 95/935 dead transitions. [2023-08-26 17:44:17,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 684 places, 935 transitions, 24818 flow [2023-08-26 17:44:17,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-08-26 17:44:17,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2023-08-26 17:44:17,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 3216 transitions. [2023-08-26 17:44:17,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40968152866242036 [2023-08-26 17:44:17,830 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 3216 transitions. [2023-08-26 17:44:17,830 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 3216 transitions. [2023-08-26 17:44:17,831 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:44:17,831 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 3216 transitions. [2023-08-26 17:44:17,834 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 64.32) internal successors, (3216), 50 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:44:17,840 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 157.0) internal successors, (8007), 51 states have internal predecessors, (8007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:44:17,840 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 157.0) internal successors, (8007), 51 states have internal predecessors, (8007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:44:17,841 INFO L175 Difference]: Start difference. First operand has 635 places, 761 transitions, 14328 flow. Second operand 50 states and 3216 transitions. [2023-08-26 17:44:17,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 684 places, 935 transitions, 24818 flow [2023-08-26 17:44:25,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 677 places, 935 transitions, 24417 flow, removed 178 selfloop flow, removed 7 redundant places. [2023-08-26 17:44:25,125 INFO L231 Difference]: Finished difference. Result has 700 places, 788 transitions, 15703 flow [2023-08-26 17:44:25,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=13927, PETRI_DIFFERENCE_MINUEND_PLACES=628, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=761, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=347, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=15703, PETRI_PLACES=700, PETRI_TRANSITIONS=788} [2023-08-26 17:44:25,126 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 678 predicate places. [2023-08-26 17:44:25,126 INFO L495 AbstractCegarLoop]: Abstraction has has 700 places, 788 transitions, 15703 flow [2023-08-26 17:44:25,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 61.09090909090909) internal successors, (2688), 44 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:44:25,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:44:25,127 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:44:25,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-26 17:44:25,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-26 17:44:25,327 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:44:25,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:44:25,328 INFO L85 PathProgramCache]: Analyzing trace with hash -338536360, now seen corresponding path program 17 times [2023-08-26 17:44:25,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:44:25,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354313683] [2023-08-26 17:44:25,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:44:25,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:44:25,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:44:26,224 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:44:26,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:44:26,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354313683] [2023-08-26 17:44:26,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354313683] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:44:26,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558710913] [2023-08-26 17:44:26,224 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 17:44:26,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:44:26,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:44:26,226 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:44:26,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-26 17:44:26,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2023-08-26 17:44:26,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:44:26,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-26 17:44:26,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:44:26,451 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:44:26,451 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:44:27,147 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:44:27,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558710913] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:44:27,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:44:27,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 42 [2023-08-26 17:44:27,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219794258] [2023-08-26 17:44:27,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:44:27,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-26 17:44:27,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:44:27,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-26 17:44:27,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1522, Unknown=0, NotChecked=0, Total=1892 [2023-08-26 17:44:27,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:44:27,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 700 places, 788 transitions, 15703 flow. Second operand has 44 states, 44 states have (on average 61.09090909090909) internal successors, (2688), 44 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:44:27,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:44:27,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:44:27,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:44:31,498 INFO L124 PetriNetUnfolderBase]: 3284/6123 cut-off events. [2023-08-26 17:44:31,498 INFO L125 PetriNetUnfolderBase]: For 4744128/4744128 co-relation queries the response was YES. [2023-08-26 17:44:31,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143750 conditions, 6123 events. 3284/6123 cut-off events. For 4744128/4744128 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 36108 event pairs, 542 based on Foata normal form. 8/6131 useless extension candidates. Maximal degree in co-relation 143480. Up to 2642 conditions per place. [2023-08-26 17:44:31,628 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 418 selfloop transitions, 478 changer transitions 99/995 dead transitions. [2023-08-26 17:44:31,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 751 places, 995 transitions, 27506 flow [2023-08-26 17:44:31,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-08-26 17:44:31,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-08-26 17:44:31,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3346 transitions. [2023-08-26 17:44:31,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4098481136697697 [2023-08-26 17:44:31,631 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3346 transitions. [2023-08-26 17:44:31,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3346 transitions. [2023-08-26 17:44:31,632 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:44:31,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3346 transitions. [2023-08-26 17:44:31,635 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 64.34615384615384) internal successors, (3346), 52 states have internal predecessors, (3346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:44:31,641 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 157.0) internal successors, (8321), 53 states have internal predecessors, (8321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:44:31,641 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 157.0) internal successors, (8321), 53 states have internal predecessors, (8321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:44:31,642 INFO L175 Difference]: Start difference. First operand has 700 places, 788 transitions, 15703 flow. Second operand 52 states and 3346 transitions. [2023-08-26 17:44:31,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 751 places, 995 transitions, 27506 flow [2023-08-26 17:44:42,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 738 places, 995 transitions, 26826 flow, removed 247 selfloop flow, removed 13 redundant places. [2023-08-26 17:44:42,660 INFO L231 Difference]: Finished difference. Result has 772 places, 842 transitions, 18335 flow [2023-08-26 17:44:42,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=15139, PETRI_DIFFERENCE_MINUEND_PLACES=687, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=788, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=424, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=18335, PETRI_PLACES=772, PETRI_TRANSITIONS=842} [2023-08-26 17:44:42,661 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 750 predicate places. [2023-08-26 17:44:42,661 INFO L495 AbstractCegarLoop]: Abstraction has has 772 places, 842 transitions, 18335 flow [2023-08-26 17:44:42,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 61.09090909090909) internal successors, (2688), 44 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:44:42,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:44:42,661 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:44:42,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-26 17:44:42,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:44:42,862 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:44:42,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:44:42,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1862138082, now seen corresponding path program 18 times [2023-08-26 17:44:42,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:44:42,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021311007] [2023-08-26 17:44:42,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:44:42,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:44:42,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:44:43,742 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:44:43,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:44:43,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021311007] [2023-08-26 17:44:43,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021311007] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:44:43,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020781271] [2023-08-26 17:44:43,742 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 17:44:43,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:44:43,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:44:43,743 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:44:43,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-26 17:44:43,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2023-08-26 17:44:43,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:44:43,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-26 17:44:43,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:44:43,966 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:44:43,967 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:44:44,653 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:44:44,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020781271] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:44:44,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:44:44,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 42 [2023-08-26 17:44:44,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784455865] [2023-08-26 17:44:44,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:44:44,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-26 17:44:44,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:44:44,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-26 17:44:44,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=1546, Unknown=0, NotChecked=0, Total=1892 [2023-08-26 17:44:44,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:44:44,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 772 places, 842 transitions, 18335 flow. Second operand has 44 states, 44 states have (on average 61.09090909090909) internal successors, (2688), 44 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:44:44,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:44:44,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:44:44,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:44:49,358 INFO L124 PetriNetUnfolderBase]: 3524/6603 cut-off events. [2023-08-26 17:44:49,358 INFO L125 PetriNetUnfolderBase]: For 5237503/5237503 co-relation queries the response was YES. [2023-08-26 17:44:49,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 158332 conditions, 6603 events. 3524/6603 cut-off events. For 5237503/5237503 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 39538 event pairs, 460 based on Foata normal form. 8/6611 useless extension candidates. Maximal degree in co-relation 158028. Up to 2878 conditions per place. [2023-08-26 17:44:49,515 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 376 selfloop transitions, 583 changer transitions 103/1062 dead transitions. [2023-08-26 17:44:49,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 825 places, 1062 transitions, 30766 flow [2023-08-26 17:44:49,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-08-26 17:44:49,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2023-08-26 17:44:49,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 3476 transitions. [2023-08-26 17:44:49,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41000235904694504 [2023-08-26 17:44:49,520 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 3476 transitions. [2023-08-26 17:44:49,520 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 3476 transitions. [2023-08-26 17:44:49,521 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:44:49,521 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 3476 transitions. [2023-08-26 17:44:49,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 64.37037037037037) internal successors, (3476), 54 states have internal predecessors, (3476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:44:49,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 157.0) internal successors, (8635), 55 states have internal predecessors, (8635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:44:49,531 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 157.0) internal successors, (8635), 55 states have internal predecessors, (8635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:44:49,531 INFO L175 Difference]: Start difference. First operand has 772 places, 842 transitions, 18335 flow. Second operand 54 states and 3476 transitions. [2023-08-26 17:44:49,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 825 places, 1062 transitions, 30766 flow [2023-08-26 17:44:59,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 808 places, 1062 transitions, 29875 flow, removed 308 selfloop flow, removed 17 redundant places. [2023-08-26 17:44:59,934 INFO L231 Difference]: Finished difference. Result has 840 places, 904 transitions, 21171 flow [2023-08-26 17:44:59,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=17516, PETRI_DIFFERENCE_MINUEND_PLACES=755, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=842, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=521, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=21171, PETRI_PLACES=840, PETRI_TRANSITIONS=904} [2023-08-26 17:44:59,935 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 818 predicate places. [2023-08-26 17:44:59,935 INFO L495 AbstractCegarLoop]: Abstraction has has 840 places, 904 transitions, 21171 flow [2023-08-26 17:44:59,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 61.09090909090909) internal successors, (2688), 44 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:44:59,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:44:59,936 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:44:59,940 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-26 17:45:00,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:45:00,136 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:45:00,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:45:00,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1388162062, now seen corresponding path program 19 times [2023-08-26 17:45:00,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:45:00,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803961368] [2023-08-26 17:45:00,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:45:00,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:45:00,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:45:01,079 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:45:01,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:45:01,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803961368] [2023-08-26 17:45:01,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803961368] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:45:01,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83878427] [2023-08-26 17:45:01,080 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 17:45:01,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:45:01,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:45:01,081 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:45:01,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-26 17:45:01,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:45:01,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-26 17:45:01,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:45:01,307 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:45:01,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:45:01,949 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:45:01,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83878427] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:45:01,949 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:45:01,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 43 [2023-08-26 17:45:01,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505624206] [2023-08-26 17:45:01,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:45:01,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-26 17:45:01,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:45:01,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-26 17:45:01,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1665, Unknown=0, NotChecked=0, Total=1980 [2023-08-26 17:45:01,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:45:01,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 840 places, 904 transitions, 21171 flow. Second operand has 45 states, 45 states have (on average 61.111111111111114) internal successors, (2750), 45 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:45:01,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:45:01,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:45:01,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:45:07,618 INFO L124 PetriNetUnfolderBase]: 3812/7179 cut-off events. [2023-08-26 17:45:07,618 INFO L125 PetriNetUnfolderBase]: For 5877146/5877146 co-relation queries the response was YES. [2023-08-26 17:45:07,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176520 conditions, 7179 events. 3812/7179 cut-off events. For 5877146/5877146 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 43975 event pairs, 320 based on Foata normal form. 8/7187 useless extension candidates. Maximal degree in co-relation 176184. Up to 3162 conditions per place. [2023-08-26 17:45:07,816 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 313 selfloop transitions, 726 changer transitions 113/1152 dead transitions. [2023-08-26 17:45:07,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 898 places, 1152 transitions, 34632 flow [2023-08-26 17:45:07,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-08-26 17:45:07,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2023-08-26 17:45:07,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 3804 transitions. [2023-08-26 17:45:07,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4106660908992767 [2023-08-26 17:45:07,818 INFO L72 ComplementDD]: Start complementDD. Operand 59 states and 3804 transitions. [2023-08-26 17:45:07,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 59 states and 3804 transitions. [2023-08-26 17:45:07,819 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:45:07,819 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 59 states and 3804 transitions. [2023-08-26 17:45:07,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 60 states, 59 states have (on average 64.47457627118644) internal successors, (3804), 59 states have internal predecessors, (3804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:45:07,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 60 states, 60 states have (on average 157.0) internal successors, (9420), 60 states have internal predecessors, (9420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:45:07,830 INFO L81 ComplementDD]: Finished complementDD. Result has 60 states, 60 states have (on average 157.0) internal successors, (9420), 60 states have internal predecessors, (9420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:45:07,830 INFO L175 Difference]: Start difference. First operand has 840 places, 904 transitions, 21171 flow. Second operand 59 states and 3804 transitions. [2023-08-26 17:45:07,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 898 places, 1152 transitions, 34632 flow [2023-08-26 17:45:19,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 876 places, 1152 transitions, 33524 flow, removed 366 selfloop flow, removed 22 redundant places. [2023-08-26 17:45:19,733 INFO L231 Difference]: Finished difference. Result has 905 places, 977 transitions, 24401 flow [2023-08-26 17:45:19,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=20189, PETRI_DIFFERENCE_MINUEND_PLACES=818, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=904, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=653, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=24401, PETRI_PLACES=905, PETRI_TRANSITIONS=977} [2023-08-26 17:45:19,735 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 883 predicate places. [2023-08-26 17:45:19,735 INFO L495 AbstractCegarLoop]: Abstraction has has 905 places, 977 transitions, 24401 flow [2023-08-26 17:45:19,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 61.111111111111114) internal successors, (2750), 45 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:45:19,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:45:19,735 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:45:19,745 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-26 17:45:19,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-26 17:45:19,943 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:45:19,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:45:19,944 INFO L85 PathProgramCache]: Analyzing trace with hash -362051588, now seen corresponding path program 20 times [2023-08-26 17:45:19,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:45:19,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764255334] [2023-08-26 17:45:19,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:45:19,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:45:19,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:45:20,811 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:45:20,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:45:20,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764255334] [2023-08-26 17:45:20,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764255334] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:45:20,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576159567] [2023-08-26 17:45:20,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 17:45:20,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:45:20,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:45:20,813 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:45:20,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-26 17:45:20,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 17:45:20,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:45:20,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-26 17:45:20,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:45:20,994 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:45:20,995 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:45:21,532 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:45:21,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576159567] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:45:21,532 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:45:21,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 42 [2023-08-26 17:45:21,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060246789] [2023-08-26 17:45:21,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:45:21,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-26 17:45:21,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:45:21,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-26 17:45:21,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=1582, Unknown=0, NotChecked=0, Total=1892 [2023-08-26 17:45:21,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:45:21,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 905 places, 977 transitions, 24401 flow. Second operand has 44 states, 44 states have (on average 61.09090909090909) internal successors, (2688), 44 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:45:21,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:45:21,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:45:21,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:45:27,777 INFO L124 PetriNetUnfolderBase]: 4084/7723 cut-off events. [2023-08-26 17:45:27,778 INFO L125 PetriNetUnfolderBase]: For 6473681/6473681 co-relation queries the response was YES. [2023-08-26 17:45:27,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193825 conditions, 7723 events. 4084/7723 cut-off events. For 6473681/6473681 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 48455 event pairs, 312 based on Foata normal form. 8/7731 useless extension candidates. Maximal degree in co-relation 193461. Up to 3426 conditions per place. [2023-08-26 17:45:28,001 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 301 selfloop transitions, 804 changer transitions 111/1216 dead transitions. [2023-08-26 17:45:28,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 962 places, 1216 transitions, 38264 flow [2023-08-26 17:45:28,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-08-26 17:45:28,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2023-08-26 17:45:28,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 3736 transitions. [2023-08-26 17:45:28,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4102789369646387 [2023-08-26 17:45:28,004 INFO L72 ComplementDD]: Start complementDD. Operand 58 states and 3736 transitions. [2023-08-26 17:45:28,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 58 states and 3736 transitions. [2023-08-26 17:45:28,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:45:28,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 58 states and 3736 transitions. [2023-08-26 17:45:28,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 59 states, 58 states have (on average 64.41379310344827) internal successors, (3736), 58 states have internal predecessors, (3736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:45:28,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 59 states, 59 states have (on average 157.0) internal successors, (9263), 59 states have internal predecessors, (9263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:45:28,015 INFO L81 ComplementDD]: Finished complementDD. Result has 59 states, 59 states have (on average 157.0) internal successors, (9263), 59 states have internal predecessors, (9263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:45:28,015 INFO L175 Difference]: Start difference. First operand has 905 places, 977 transitions, 24401 flow. Second operand 58 states and 3736 transitions. [2023-08-26 17:45:28,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 962 places, 1216 transitions, 38264 flow [2023-08-26 17:45:41,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 933 places, 1216 transitions, 36876 flow, removed 401 selfloop flow, removed 29 redundant places. [2023-08-26 17:45:41,471 INFO L231 Difference]: Finished difference. Result has 961 places, 1046 transitions, 27607 flow [2023-08-26 17:45:41,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=23185, PETRI_DIFFERENCE_MINUEND_PLACES=876, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=977, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=735, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=27607, PETRI_PLACES=961, PETRI_TRANSITIONS=1046} [2023-08-26 17:45:41,473 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 939 predicate places. [2023-08-26 17:45:41,473 INFO L495 AbstractCegarLoop]: Abstraction has has 961 places, 1046 transitions, 27607 flow [2023-08-26 17:45:41,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 61.09090909090909) internal successors, (2688), 44 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:45:41,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:45:41,473 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:45:41,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-26 17:45:41,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-26 17:45:41,678 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:45:41,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:45:41,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1668613760, now seen corresponding path program 21 times [2023-08-26 17:45:41,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:45:41,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307212569] [2023-08-26 17:45:41,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:45:41,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:45:41,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:45:42,513 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:45:42,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:45:42,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307212569] [2023-08-26 17:45:42,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307212569] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:45:42,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27810118] [2023-08-26 17:45:42,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 17:45:42,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:45:42,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:45:42,515 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:45:42,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-26 17:45:42,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2023-08-26 17:45:42,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:45:42,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-26 17:45:42,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:45:42,723 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:45:42,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:45:43,274 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:45:43,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27810118] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:45:43,275 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:45:43,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 42 [2023-08-26 17:45:43,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951530280] [2023-08-26 17:45:43,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:45:43,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-26 17:45:43,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:45:43,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-26 17:45:43,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=1594, Unknown=0, NotChecked=0, Total=1892 [2023-08-26 17:45:43,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:45:43,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 961 places, 1046 transitions, 27607 flow. Second operand has 44 states, 44 states have (on average 61.09090909090909) internal successors, (2688), 44 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:45:43,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:45:43,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:45:43,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:45:50,268 INFO L124 PetriNetUnfolderBase]: 4324/8203 cut-off events. [2023-08-26 17:45:50,268 INFO L125 PetriNetUnfolderBase]: For 7012112/7012112 co-relation queries the response was YES. [2023-08-26 17:45:50,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 208966 conditions, 8203 events. 4324/8203 cut-off events. For 7012112/7012112 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 52318 event pairs, 278 based on Foata normal form. 8/8211 useless extension candidates. Maximal degree in co-relation 208574. Up to 3650 conditions per place. [2023-08-26 17:45:50,516 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 280 selfloop transitions, 888 changer transitions 115/1283 dead transitions. [2023-08-26 17:45:50,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1020 places, 1283 transitions, 41924 flow [2023-08-26 17:45:50,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-08-26 17:45:50,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2023-08-26 17:45:50,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3866 transitions. [2023-08-26 17:45:50,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41040339702760087 [2023-08-26 17:45:50,519 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3866 transitions. [2023-08-26 17:45:50,519 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3866 transitions. [2023-08-26 17:45:50,519 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:45:50,519 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3866 transitions. [2023-08-26 17:45:50,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 64.43333333333334) internal successors, (3866), 60 states have internal predecessors, (3866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:45:50,528 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 157.0) internal successors, (9577), 61 states have internal predecessors, (9577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:45:50,529 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 157.0) internal successors, (9577), 61 states have internal predecessors, (9577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:45:50,529 INFO L175 Difference]: Start difference. First operand has 961 places, 1046 transitions, 27607 flow. Second operand 60 states and 3866 transitions. [2023-08-26 17:45:50,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1020 places, 1283 transitions, 41924 flow [2023-08-26 17:46:08,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 991 places, 1283 transitions, 40326 flow, removed 464 selfloop flow, removed 29 redundant places. [2023-08-26 17:46:08,937 INFO L231 Difference]: Finished difference. Result has 1017 places, 1107 transitions, 30651 flow [2023-08-26 17:46:08,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=26245, PETRI_DIFFERENCE_MINUEND_PLACES=932, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1046, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=827, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=30651, PETRI_PLACES=1017, PETRI_TRANSITIONS=1107} [2023-08-26 17:46:08,938 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 995 predicate places. [2023-08-26 17:46:08,938 INFO L495 AbstractCegarLoop]: Abstraction has has 1017 places, 1107 transitions, 30651 flow [2023-08-26 17:46:08,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 61.09090909090909) internal successors, (2688), 44 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:46:08,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:46:08,939 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:46:08,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-26 17:46:09,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-26 17:46:09,139 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:46:09,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:46:09,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1950139402, now seen corresponding path program 22 times [2023-08-26 17:46:09,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:46:09,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223105121] [2023-08-26 17:46:09,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:46:09,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:46:09,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:46:09,883 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:46:09,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:46:09,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223105121] [2023-08-26 17:46:09,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223105121] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:46:09,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258194101] [2023-08-26 17:46:09,883 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 17:46:09,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:46:09,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:46:09,885 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:46:09,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-26 17:46:09,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 17:46:09,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:46:09,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-26 17:46:09,976 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:46:10,068 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:46:10,068 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:46:10,576 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:46:10,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258194101] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:46:10,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:46:10,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 42 [2023-08-26 17:46:10,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146545818] [2023-08-26 17:46:10,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:46:10,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-26 17:46:10,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:46:10,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-26 17:46:10,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2023-08-26 17:46:10,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:46:10,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1017 places, 1107 transitions, 30651 flow. Second operand has 44 states, 44 states have (on average 61.09090909090909) internal successors, (2688), 44 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:46:10,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:46:10,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:46:10,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:46:18,886 INFO L124 PetriNetUnfolderBase]: 4492/8539 cut-off events. [2023-08-26 17:46:18,886 INFO L125 PetriNetUnfolderBase]: For 7387111/7387111 co-relation queries the response was YES. [2023-08-26 17:46:19,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219931 conditions, 8539 events. 4492/8539 cut-off events. For 7387111/7387111 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 55000 event pairs, 220 based on Foata normal form. 8/8547 useless extension candidates. Maximal degree in co-relation 219513. Up to 3802 conditions per place. [2023-08-26 17:46:19,155 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 249 selfloop transitions, 965 changer transitions 119/1333 dead transitions. [2023-08-26 17:46:19,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1078 places, 1333 transitions, 45126 flow [2023-08-26 17:46:19,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-08-26 17:46:19,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2023-08-26 17:46:19,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 3996 transitions. [2023-08-26 17:46:19,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41051982740908155 [2023-08-26 17:46:19,158 INFO L72 ComplementDD]: Start complementDD. Operand 62 states and 3996 transitions. [2023-08-26 17:46:19,158 INFO L73 IsDeterministic]: Start isDeterministic. Operand 62 states and 3996 transitions. [2023-08-26 17:46:19,159 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:46:19,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 62 states and 3996 transitions. [2023-08-26 17:46:19,162 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 63 states, 62 states have (on average 64.45161290322581) internal successors, (3996), 62 states have internal predecessors, (3996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:46:19,167 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 63 states, 63 states have (on average 157.0) internal successors, (9891), 63 states have internal predecessors, (9891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:46:19,167 INFO L81 ComplementDD]: Finished complementDD. Result has 63 states, 63 states have (on average 157.0) internal successors, (9891), 63 states have internal predecessors, (9891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:46:19,167 INFO L175 Difference]: Start difference. First operand has 1017 places, 1107 transitions, 30651 flow. Second operand 62 states and 3996 transitions. [2023-08-26 17:46:19,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1078 places, 1333 transitions, 45126 flow [2023-08-26 17:46:37,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1045 places, 1333 transitions, 43396 flow, removed 439 selfloop flow, removed 33 redundant places. [2023-08-26 17:46:37,575 INFO L231 Difference]: Finished difference. Result has 1069 places, 1151 transitions, 33278 flow [2023-08-26 17:46:37,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=29117, PETRI_DIFFERENCE_MINUEND_PLACES=984, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=921, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=62, PETRI_FLOW=33278, PETRI_PLACES=1069, PETRI_TRANSITIONS=1151} [2023-08-26 17:46:37,577 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 1047 predicate places. [2023-08-26 17:46:37,577 INFO L495 AbstractCegarLoop]: Abstraction has has 1069 places, 1151 transitions, 33278 flow [2023-08-26 17:46:37,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 61.09090909090909) internal successors, (2688), 44 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:46:37,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:46:37,577 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:46:37,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-08-26 17:46:37,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:46:37,782 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:46:37,783 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:46:37,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1712564500, now seen corresponding path program 23 times [2023-08-26 17:46:37,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:46:37,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739783961] [2023-08-26 17:46:37,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:46:37,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:46:37,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:46:38,530 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:46:38,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:46:38,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739783961] [2023-08-26 17:46:38,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739783961] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:46:38,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435931934] [2023-08-26 17:46:38,530 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 17:46:38,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:46:38,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:46:38,531 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:46:38,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-26 17:46:38,621 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2023-08-26 17:46:38,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:46:38,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-26 17:46:38,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:46:38,700 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:46:38,701 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:46:39,236 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:46:39,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435931934] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:46:39,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:46:39,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 42 [2023-08-26 17:46:39,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931843402] [2023-08-26 17:46:39,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:46:39,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-26 17:46:39,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:46:39,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-26 17:46:39,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=1606, Unknown=0, NotChecked=0, Total=1892 [2023-08-26 17:46:39,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:46:39,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1069 places, 1151 transitions, 33278 flow. Second operand has 44 states, 44 states have (on average 61.09090909090909) internal successors, (2688), 44 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:46:39,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:46:39,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:46:39,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:46:47,437 INFO L124 PetriNetUnfolderBase]: 4668/8891 cut-off events. [2023-08-26 17:46:47,437 INFO L125 PetriNetUnfolderBase]: For 7792113/7792113 co-relation queries the response was YES. [2023-08-26 17:46:47,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231477 conditions, 8891 events. 4668/8891 cut-off events. For 7792113/7792113 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 57750 event pairs, 204 based on Foata normal form. 8/8899 useless extension candidates. Maximal degree in co-relation 231035. Up to 3962 conditions per place. [2023-08-26 17:46:47,758 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 235 selfloop transitions, 1026 changer transitions 123/1384 dead transitions. [2023-08-26 17:46:47,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1132 places, 1384 transitions, 48306 flow [2023-08-26 17:46:47,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-08-26 17:46:47,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2023-08-26 17:46:47,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 4126 transitions. [2023-08-26 17:46:47,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41062898089171973 [2023-08-26 17:46:47,761 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 4126 transitions. [2023-08-26 17:46:47,761 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 4126 transitions. [2023-08-26 17:46:47,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:46:47,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 4126 transitions. [2023-08-26 17:46:47,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 64.46875) internal successors, (4126), 64 states have internal predecessors, (4126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:46:47,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 157.0) internal successors, (10205), 65 states have internal predecessors, (10205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:46:47,772 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 157.0) internal successors, (10205), 65 states have internal predecessors, (10205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:46:47,772 INFO L175 Difference]: Start difference. First operand has 1069 places, 1151 transitions, 33278 flow. Second operand 64 states and 4126 transitions. [2023-08-26 17:46:47,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1132 places, 1384 transitions, 48306 flow [2023-08-26 17:47:09,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1095 places, 1384 transitions, 46428 flow, removed 415 selfloop flow, removed 37 redundant places. [2023-08-26 17:47:09,419 INFO L231 Difference]: Finished difference. Result has 1117 places, 1196 transitions, 35850 flow [2023-08-26 17:47:09,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=31592, PETRI_DIFFERENCE_MINUEND_PLACES=1032, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=981, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=35850, PETRI_PLACES=1117, PETRI_TRANSITIONS=1196} [2023-08-26 17:47:09,421 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 1095 predicate places. [2023-08-26 17:47:09,421 INFO L495 AbstractCegarLoop]: Abstraction has has 1117 places, 1196 transitions, 35850 flow [2023-08-26 17:47:09,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 61.09090909090909) internal successors, (2688), 44 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:47:09,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:47:09,421 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:47:09,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-26 17:47:09,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-26 17:47:09,623 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:47:09,623 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:47:09,623 INFO L85 PathProgramCache]: Analyzing trace with hash -202663900, now seen corresponding path program 24 times [2023-08-26 17:47:09,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:47:09,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720133699] [2023-08-26 17:47:09,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:47:09,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:47:09,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:47:10,418 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:47:10,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:47:10,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720133699] [2023-08-26 17:47:10,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720133699] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:47:10,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638909312] [2023-08-26 17:47:10,418 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 17:47:10,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:47:10,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:47:10,419 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:47:10,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-26 17:47:10,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2023-08-26 17:47:10,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:47:10,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-26 17:47:10,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:47:10,627 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:47:10,627 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:47:11,137 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:47:11,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638909312] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:47:11,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:47:11,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 43 [2023-08-26 17:47:11,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610340308] [2023-08-26 17:47:11,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:47:11,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-26 17:47:11,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:47:11,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-26 17:47:11,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=1700, Unknown=0, NotChecked=0, Total=1980 [2023-08-26 17:47:11,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:47:11,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1117 places, 1196 transitions, 35850 flow. Second operand has 45 states, 45 states have (on average 61.111111111111114) internal successors, (2750), 45 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:47:11,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:47:11,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:47:11,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:47:19,993 INFO L124 PetriNetUnfolderBase]: 4820/9195 cut-off events. [2023-08-26 17:47:19,994 INFO L125 PetriNetUnfolderBase]: For 8163790/8163790 co-relation queries the response was YES. [2023-08-26 17:47:20,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242113 conditions, 9195 events. 4820/9195 cut-off events. For 8163790/8163790 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 60151 event pairs, 150 based on Foata normal form. 8/9203 useless extension candidates. Maximal degree in co-relation 241649. Up to 4106 conditions per place. [2023-08-26 17:47:20,307 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 215 selfloop transitions, 1092 changer transitions 133/1440 dead transitions. [2023-08-26 17:47:20,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1185 places, 1440 transitions, 51531 flow [2023-08-26 17:47:20,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-08-26 17:47:20,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2023-08-26 17:47:20,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 4454 transitions. [2023-08-26 17:47:20,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111511123419182 [2023-08-26 17:47:20,310 INFO L72 ComplementDD]: Start complementDD. Operand 69 states and 4454 transitions. [2023-08-26 17:47:20,310 INFO L73 IsDeterministic]: Start isDeterministic. Operand 69 states and 4454 transitions. [2023-08-26 17:47:20,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:47:20,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 69 states and 4454 transitions. [2023-08-26 17:47:20,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 70 states, 69 states have (on average 64.55072463768116) internal successors, (4454), 69 states have internal predecessors, (4454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:47:20,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 70 states, 70 states have (on average 157.0) internal successors, (10990), 70 states have internal predecessors, (10990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:47:20,318 INFO L81 ComplementDD]: Finished complementDD. Result has 70 states, 70 states have (on average 157.0) internal successors, (10990), 70 states have internal predecessors, (10990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:47:20,318 INFO L175 Difference]: Start difference. First operand has 1117 places, 1196 transitions, 35850 flow. Second operand 69 states and 4454 transitions. [2023-08-26 17:47:20,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1185 places, 1440 transitions, 51531 flow [2023-08-26 17:47:43,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1144 places, 1440 transitions, 49490 flow, removed 410 selfloop flow, removed 41 redundant places. [2023-08-26 17:47:43,828 INFO L231 Difference]: Finished difference. Result has 1163 places, 1235 transitions, 38250 flow [2023-08-26 17:47:43,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=33987, PETRI_DIFFERENCE_MINUEND_PLACES=1076, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1053, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=69, PETRI_FLOW=38250, PETRI_PLACES=1163, PETRI_TRANSITIONS=1235} [2023-08-26 17:47:43,830 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 1141 predicate places. [2023-08-26 17:47:43,830 INFO L495 AbstractCegarLoop]: Abstraction has has 1163 places, 1235 transitions, 38250 flow [2023-08-26 17:47:43,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 61.111111111111114) internal successors, (2750), 45 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:47:43,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:47:43,830 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:47:43,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-08-26 17:47:44,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:47:44,031 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:47:44,031 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:47:44,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1408853452, now seen corresponding path program 25 times [2023-08-26 17:47:44,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:47:44,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323539603] [2023-08-26 17:47:44,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:47:44,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:47:44,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:47:44,782 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:47:44,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:47:44,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323539603] [2023-08-26 17:47:44,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323539603] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:47:44,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615277405] [2023-08-26 17:47:44,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 17:47:44,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:47:44,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:47:44,784 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:47:44,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-26 17:47:44,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:47:44,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-26 17:47:44,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:47:44,976 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:47:44,977 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:47:45,467 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:47:45,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615277405] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:47:45,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:47:45,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 43 [2023-08-26 17:47:45,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343953700] [2023-08-26 17:47:45,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:47:45,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-26 17:47:45,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:47:45,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-26 17:47:45,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1695, Unknown=0, NotChecked=0, Total=1980 [2023-08-26 17:47:45,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:47:45,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1163 places, 1235 transitions, 38250 flow. Second operand has 45 states, 45 states have (on average 61.111111111111114) internal successors, (2750), 45 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:47:45,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:47:45,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:47:45,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:47:54,759 INFO L124 PetriNetUnfolderBase]: 4956/9467 cut-off events. [2023-08-26 17:47:54,759 INFO L125 PetriNetUnfolderBase]: For 8531962/8531962 co-relation queries the response was YES. [2023-08-26 17:47:55,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252019 conditions, 9467 events. 4956/9467 cut-off events. For 8531962/8531962 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 62300 event pairs, 146 based on Foata normal form. 8/9475 useless extension candidates. Maximal degree in co-relation 251536. Up to 4234 conditions per place. [2023-08-26 17:47:55,182 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 206 selfloop transitions, 1138 changer transitions 137/1481 dead transitions. [2023-08-26 17:47:55,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1233 places, 1481 transitions, 54399 flow [2023-08-26 17:47:55,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-08-26 17:47:55,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2023-08-26 17:47:55,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 4584 transitions. [2023-08-26 17:47:55,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41123172153942766 [2023-08-26 17:47:55,186 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 4584 transitions. [2023-08-26 17:47:55,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 4584 transitions. [2023-08-26 17:47:55,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:47:55,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 4584 transitions. [2023-08-26 17:47:55,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 64.56338028169014) internal successors, (4584), 71 states have internal predecessors, (4584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:47:55,197 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 157.0) internal successors, (11304), 72 states have internal predecessors, (11304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:47:55,198 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 157.0) internal successors, (11304), 72 states have internal predecessors, (11304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:47:55,198 INFO L175 Difference]: Start difference. First operand has 1163 places, 1235 transitions, 38250 flow. Second operand 71 states and 4584 transitions. [2023-08-26 17:47:55,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1233 places, 1481 transitions, 54399 flow [2023-08-26 17:48:24,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1184 places, 1481 transitions, 52210 flow, removed 399 selfloop flow, removed 49 redundant places. [2023-08-26 17:48:24,944 INFO L231 Difference]: Finished difference. Result has 1201 places, 1270 transitions, 40484 flow [2023-08-26 17:48:24,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=36231, PETRI_DIFFERENCE_MINUEND_PLACES=1114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=40484, PETRI_PLACES=1201, PETRI_TRANSITIONS=1270} [2023-08-26 17:48:24,946 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 1179 predicate places. [2023-08-26 17:48:24,946 INFO L495 AbstractCegarLoop]: Abstraction has has 1201 places, 1270 transitions, 40484 flow [2023-08-26 17:48:24,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 61.111111111111114) internal successors, (2750), 45 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:48:24,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:48:24,946 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:48:24,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-26 17:48:25,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:48:25,147 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:48:25,147 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:48:25,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1094129080, now seen corresponding path program 26 times [2023-08-26 17:48:25,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:48:25,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306541695] [2023-08-26 17:48:25,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:48:25,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:48:25,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:48:25,905 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:48:25,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:48:25,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306541695] [2023-08-26 17:48:25,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306541695] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:48:25,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776230203] [2023-08-26 17:48:25,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 17:48:25,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:48:25,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:48:25,907 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:48:25,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-26 17:48:26,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 17:48:26,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:48:26,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-26 17:48:26,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:48:26,129 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:48:26,129 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:48:26,684 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:48:26,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776230203] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:48:26,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:48:26,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 42 [2023-08-26 17:48:26,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700153411] [2023-08-26 17:48:26,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:48:26,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-26 17:48:26,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:48:26,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-26 17:48:26,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=1594, Unknown=0, NotChecked=0, Total=1892 [2023-08-26 17:48:26,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:48:26,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1201 places, 1270 transitions, 40484 flow. Second operand has 44 states, 44 states have (on average 61.09090909090909) internal successors, (2688), 44 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:48:26,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:48:26,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:48:26,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:48:38,208 INFO L124 PetriNetUnfolderBase]: 5084/9723 cut-off events. [2023-08-26 17:48:38,208 INFO L125 PetriNetUnfolderBase]: For 8890798/8890798 co-relation queries the response was YES. [2023-08-26 17:48:38,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261636 conditions, 9723 events. 5084/9723 cut-off events. For 8890798/8890798 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 64327 event pairs, 144 based on Foata normal form. 8/9731 useless extension candidates. Maximal degree in co-relation 261136. Up to 4354 conditions per place. [2023-08-26 17:48:38,620 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 200 selfloop transitions, 1174 changer transitions 135/1509 dead transitions. [2023-08-26 17:48:38,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1270 places, 1509 transitions, 56927 flow [2023-08-26 17:48:38,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-08-26 17:48:38,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2023-08-26 17:48:38,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 4516 transitions. [2023-08-26 17:48:38,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41091901728844404 [2023-08-26 17:48:38,624 INFO L72 ComplementDD]: Start complementDD. Operand 70 states and 4516 transitions. [2023-08-26 17:48:38,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 70 states and 4516 transitions. [2023-08-26 17:48:38,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:48:38,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 70 states and 4516 transitions. [2023-08-26 17:48:38,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 71 states, 70 states have (on average 64.51428571428572) internal successors, (4516), 70 states have internal predecessors, (4516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:48:38,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 71 states, 71 states have (on average 157.0) internal successors, (11147), 71 states have internal predecessors, (11147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:48:38,632 INFO L81 ComplementDD]: Finished complementDD. Result has 71 states, 71 states have (on average 157.0) internal successors, (11147), 71 states have internal predecessors, (11147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:48:38,633 INFO L175 Difference]: Start difference. First operand has 1201 places, 1270 transitions, 40484 flow. Second operand 70 states and 4516 transitions. [2023-08-26 17:48:38,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1270 places, 1509 transitions, 56927 flow [2023-08-26 17:49:08,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1217 places, 1509 transitions, 54586 flow, removed 415 selfloop flow, removed 53 redundant places. [2023-08-26 17:49:08,423 INFO L231 Difference]: Finished difference. Result has 1233 places, 1303 transitions, 42636 flow [2023-08-26 17:49:08,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=38335, PETRI_DIFFERENCE_MINUEND_PLACES=1148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=70, PETRI_FLOW=42636, PETRI_PLACES=1233, PETRI_TRANSITIONS=1303} [2023-08-26 17:49:08,424 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 1211 predicate places. [2023-08-26 17:49:08,425 INFO L495 AbstractCegarLoop]: Abstraction has has 1233 places, 1303 transitions, 42636 flow [2023-08-26 17:49:08,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 61.09090909090909) internal successors, (2688), 44 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:49:08,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:49:08,425 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:49:08,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-26 17:49:08,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:49:08,626 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:49:08,626 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:49:08,626 INFO L85 PathProgramCache]: Analyzing trace with hash 2142583224, now seen corresponding path program 27 times [2023-08-26 17:49:08,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:49:08,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750090341] [2023-08-26 17:49:08,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:49:08,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:49:08,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:49:09,364 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:49:09,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:49:09,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750090341] [2023-08-26 17:49:09,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750090341] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:49:09,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152608967] [2023-08-26 17:49:09,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 17:49:09,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:49:09,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:49:09,367 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:49:09,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-26 17:49:09,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2023-08-26 17:49:09,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:49:09,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-26 17:49:09,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:49:09,574 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:49:09,574 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:49:10,105 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:49:10,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152608967] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:49:10,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:49:10,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 43 [2023-08-26 17:49:10,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912784659] [2023-08-26 17:49:10,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:49:10,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-26 17:49:10,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:49:10,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-26 17:49:10,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1686, Unknown=0, NotChecked=0, Total=1980 [2023-08-26 17:49:10,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:49:10,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1233 places, 1303 transitions, 42636 flow. Second operand has 45 states, 45 states have (on average 61.111111111111114) internal successors, (2750), 45 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:49:10,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:49:10,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:49:10,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:49:22,308 INFO L124 PetriNetUnfolderBase]: 5204/9963 cut-off events. [2023-08-26 17:49:22,308 INFO L125 PetriNetUnfolderBase]: For 9224858/9224858 co-relation queries the response was YES. [2023-08-26 17:49:22,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270454 conditions, 9963 events. 5204/9963 cut-off events. For 9224858/9224858 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 66253 event pairs, 126 based on Foata normal form. 8/9971 useless extension candidates. Maximal degree in co-relation 269938. Up to 4466 conditions per place. [2023-08-26 17:49:22,714 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 198 selfloop transitions, 1212 changer transitions 141/1551 dead transitions. [2023-08-26 17:49:22,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1305 places, 1551 transitions, 59379 flow [2023-08-26 17:49:22,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-08-26 17:49:22,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2023-08-26 17:49:22,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 4714 transitions. [2023-08-26 17:49:22,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4113079137946078 [2023-08-26 17:49:22,718 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 4714 transitions. [2023-08-26 17:49:22,718 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 4714 transitions. [2023-08-26 17:49:22,719 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:49:22,719 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 4714 transitions. [2023-08-26 17:49:22,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 64.57534246575342) internal successors, (4714), 73 states have internal predecessors, (4714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:49:22,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 157.0) internal successors, (11618), 74 states have internal predecessors, (11618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:49:22,730 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 157.0) internal successors, (11618), 74 states have internal predecessors, (11618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:49:22,730 INFO L175 Difference]: Start difference. First operand has 1233 places, 1303 transitions, 42636 flow. Second operand 73 states and 4714 transitions. [2023-08-26 17:49:22,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1305 places, 1551 transitions, 59379 flow [2023-08-26 17:49:57,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1252 places, 1551 transitions, 56958 flow, removed 424 selfloop flow, removed 53 redundant places. [2023-08-26 17:49:57,442 INFO L231 Difference]: Finished difference. Result has 1267 places, 1334 transitions, 44746 flow [2023-08-26 17:49:57,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=40419, PETRI_DIFFERENCE_MINUEND_PLACES=1180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=44746, PETRI_PLACES=1267, PETRI_TRANSITIONS=1334} [2023-08-26 17:49:57,444 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 1245 predicate places. [2023-08-26 17:49:57,445 INFO L495 AbstractCegarLoop]: Abstraction has has 1267 places, 1334 transitions, 44746 flow [2023-08-26 17:49:57,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 61.111111111111114) internal successors, (2750), 45 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:49:57,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:49:57,445 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:49:57,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-26 17:49:57,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:49:57,650 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:49:57,651 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:49:57,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1734386882, now seen corresponding path program 28 times [2023-08-26 17:49:57,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:49:57,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423415784] [2023-08-26 17:49:57,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:49:57,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:49:57,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:49:58,378 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:49:58,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:49:58,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423415784] [2023-08-26 17:49:58,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423415784] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:49:58,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1102138039] [2023-08-26 17:49:58,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 17:49:58,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:49:58,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:49:58,380 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:49:58,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-26 17:49:58,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 17:49:58,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:49:58,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-26 17:49:58,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:49:58,553 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:49:58,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:49:59,018 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:49:59,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1102138039] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:49:59,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:49:59,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 42 [2023-08-26 17:49:59,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506349792] [2023-08-26 17:49:59,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:49:59,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-26 17:49:59,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:49:59,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-26 17:49:59,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=1582, Unknown=0, NotChecked=0, Total=1892 [2023-08-26 17:49:59,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:49:59,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1267 places, 1334 transitions, 44746 flow. Second operand has 44 states, 44 states have (on average 61.09090909090909) internal successors, (2688), 44 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:49:59,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:49:59,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:49:59,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:50:11,338 INFO L124 PetriNetUnfolderBase]: 5316/10187 cut-off events. [2023-08-26 17:50:11,338 INFO L125 PetriNetUnfolderBase]: For 9553347/9553347 co-relation queries the response was YES. [2023-08-26 17:50:11,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 278893 conditions, 10187 events. 5316/10187 cut-off events. For 9553347/9553347 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 68146 event pairs, 124 based on Foata normal form. 8/10195 useless extension candidates. Maximal degree in co-relation 278362. Up to 4570 conditions per place. [2023-08-26 17:50:11,965 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 192 selfloop transitions, 1244 changer transitions 139/1575 dead transitions. [2023-08-26 17:50:11,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1338 places, 1575 transitions, 61749 flow [2023-08-26 17:50:11,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-08-26 17:50:11,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2023-08-26 17:50:11,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 4646 transitions. [2023-08-26 17:50:11,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41100495399858455 [2023-08-26 17:50:11,968 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 4646 transitions. [2023-08-26 17:50:11,968 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 4646 transitions. [2023-08-26 17:50:11,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:50:11,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 4646 transitions. [2023-08-26 17:50:11,971 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 64.52777777777777) internal successors, (4646), 72 states have internal predecessors, (4646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:50:11,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 157.0) internal successors, (11461), 73 states have internal predecessors, (11461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:50:11,976 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 157.0) internal successors, (11461), 73 states have internal predecessors, (11461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:50:11,976 INFO L175 Difference]: Start difference. First operand has 1267 places, 1334 transitions, 44746 flow. Second operand 72 states and 4646 transitions. [2023-08-26 17:50:11,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1338 places, 1575 transitions, 61749 flow [2023-08-26 17:50:54,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1281 places, 1575 transitions, 59290 flow, removed 406 selfloop flow, removed 57 redundant places. [2023-08-26 17:50:54,289 INFO L231 Difference]: Finished difference. Result has 1295 places, 1363 transitions, 46822 flow [2023-08-26 17:50:54,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=42467, PETRI_DIFFERENCE_MINUEND_PLACES=1210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=46822, PETRI_PLACES=1295, PETRI_TRANSITIONS=1363} [2023-08-26 17:50:54,292 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 1273 predicate places. [2023-08-26 17:50:54,292 INFO L495 AbstractCegarLoop]: Abstraction has has 1295 places, 1363 transitions, 46822 flow [2023-08-26 17:50:54,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 61.09090909090909) internal successors, (2688), 44 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:50:54,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:50:54,293 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:50:54,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-26 17:50:54,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-08-26 17:50:54,498 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:50:54,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:50:54,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1323938370, now seen corresponding path program 29 times [2023-08-26 17:50:54,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:50:54,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235578750] [2023-08-26 17:50:54,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:50:54,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:50:54,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:50:55,153 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:50:55,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:50:55,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235578750] [2023-08-26 17:50:55,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235578750] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:50:55,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155526189] [2023-08-26 17:50:55,153 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 17:50:55,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:50:55,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:50:55,156 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:50:55,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-26 17:50:55,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2023-08-26 17:50:55,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:50:55,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-26 17:50:55,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:50:55,351 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:50:55,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:50:55,854 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:50:55,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155526189] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:50:55,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:50:55,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 43 [2023-08-26 17:50:55,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885720407] [2023-08-26 17:50:55,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:50:55,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-26 17:50:55,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:50:55,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-26 17:50:55,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=1673, Unknown=0, NotChecked=0, Total=1980 [2023-08-26 17:50:55,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:50:55,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1295 places, 1363 transitions, 46822 flow. Second operand has 45 states, 45 states have (on average 61.111111111111114) internal successors, (2750), 45 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:50:55,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:50:55,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:50:55,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:51:08,989 INFO L124 PetriNetUnfolderBase]: 5420/10395 cut-off events. [2023-08-26 17:51:08,990 INFO L125 PetriNetUnfolderBase]: For 9875128/9875128 co-relation queries the response was YES. [2023-08-26 17:51:09,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287090 conditions, 10395 events. 5420/10395 cut-off events. For 9875128/9875128 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 69979 event pairs, 106 based on Foata normal form. 8/10403 useless extension candidates. Maximal degree in co-relation 286545. Up to 4666 conditions per place. [2023-08-26 17:51:09,432 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 190 selfloop transitions, 1278 changer transitions 145/1613 dead transitions. [2023-08-26 17:51:09,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1369 places, 1613 transitions, 64129 flow [2023-08-26 17:51:09,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-08-26 17:51:09,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2023-08-26 17:51:09,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 4844 transitions. [2023-08-26 17:51:09,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.411380042462845 [2023-08-26 17:51:09,435 INFO L72 ComplementDD]: Start complementDD. Operand 75 states and 4844 transitions. [2023-08-26 17:51:09,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 75 states and 4844 transitions. [2023-08-26 17:51:09,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:51:09,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 75 states and 4844 transitions. [2023-08-26 17:51:09,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 76 states, 75 states have (on average 64.58666666666667) internal successors, (4844), 75 states have internal predecessors, (4844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:51:09,444 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 76 states, 76 states have (on average 157.0) internal successors, (11932), 76 states have internal predecessors, (11932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:51:09,445 INFO L81 ComplementDD]: Finished complementDD. Result has 76 states, 76 states have (on average 157.0) internal successors, (11932), 76 states have internal predecessors, (11932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:51:09,445 INFO L175 Difference]: Start difference. First operand has 1295 places, 1363 transitions, 46822 flow. Second operand 75 states and 4844 transitions. [2023-08-26 17:51:09,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1369 places, 1613 transitions, 64129 flow [2023-08-26 17:51:46,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1312 places, 1613 transitions, 61570 flow, removed 421 selfloop flow, removed 57 redundant places. [2023-08-26 17:51:46,696 INFO L231 Difference]: Finished difference. Result has 1325 places, 1390 transitions, 48820 flow [2023-08-26 17:51:46,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=44463, PETRI_DIFFERENCE_MINUEND_PLACES=1238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=48820, PETRI_PLACES=1325, PETRI_TRANSITIONS=1390} [2023-08-26 17:51:46,698 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 1303 predicate places. [2023-08-26 17:51:46,698 INFO L495 AbstractCegarLoop]: Abstraction has has 1325 places, 1390 transitions, 48820 flow [2023-08-26 17:51:46,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 61.111111111111114) internal successors, (2750), 45 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:51:46,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:51:46,699 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:51:46,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-26 17:51:46,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-08-26 17:51:46,905 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:51:46,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:51:46,905 INFO L85 PathProgramCache]: Analyzing trace with hash -740921780, now seen corresponding path program 30 times [2023-08-26 17:51:46,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:51:46,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130450479] [2023-08-26 17:51:46,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:51:46,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:51:46,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:51:47,526 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:51:47,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:51:47,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130450479] [2023-08-26 17:51:47,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130450479] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:51:47,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309904177] [2023-08-26 17:51:47,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 17:51:47,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:51:47,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:51:47,528 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:51:47,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-26 17:51:47,634 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2023-08-26 17:51:47,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:51:47,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-26 17:51:47,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:51:47,705 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:51:47,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:51:48,198 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:51:48,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309904177] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:51:48,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:51:48,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 42 [2023-08-26 17:51:48,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641176559] [2023-08-26 17:51:48,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:51:48,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-26 17:51:48,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:51:48,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-26 17:51:48,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1566, Unknown=0, NotChecked=0, Total=1892 [2023-08-26 17:51:48,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:51:48,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1325 places, 1390 transitions, 48820 flow. Second operand has 44 states, 44 states have (on average 61.09090909090909) internal successors, (2688), 44 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:51:48,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:51:48,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:51:48,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:52:02,186 INFO L124 PetriNetUnfolderBase]: 5516/10587 cut-off events. [2023-08-26 17:52:02,187 INFO L125 PetriNetUnfolderBase]: For 10181336/10181336 co-relation queries the response was YES. [2023-08-26 17:52:02,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294691 conditions, 10587 events. 5516/10587 cut-off events. For 10181336/10181336 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 71614 event pairs, 104 based on Foata normal form. 8/10595 useless extension candidates. Maximal degree in co-relation 294133. Up to 4754 conditions per place. [2023-08-26 17:52:02,683 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 184 selfloop transitions, 1306 changer transitions 143/1633 dead transitions. [2023-08-26 17:52:02,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1398 places, 1633 transitions, 66383 flow [2023-08-26 17:52:02,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-08-26 17:52:02,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2023-08-26 17:52:02,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 4776 transitions. [2023-08-26 17:52:02,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4110862454811499 [2023-08-26 17:52:02,687 INFO L72 ComplementDD]: Start complementDD. Operand 74 states and 4776 transitions. [2023-08-26 17:52:02,687 INFO L73 IsDeterministic]: Start isDeterministic. Operand 74 states and 4776 transitions. [2023-08-26 17:52:02,687 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:52:02,687 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 74 states and 4776 transitions. [2023-08-26 17:52:02,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 75 states, 74 states have (on average 64.54054054054055) internal successors, (4776), 74 states have internal predecessors, (4776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:52:02,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 75 states, 75 states have (on average 157.0) internal successors, (11775), 75 states have internal predecessors, (11775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:52:02,695 INFO L81 ComplementDD]: Finished complementDD. Result has 75 states, 75 states have (on average 157.0) internal successors, (11775), 75 states have internal predecessors, (11775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:52:02,695 INFO L175 Difference]: Start difference. First operand has 1325 places, 1390 transitions, 48820 flow. Second operand 74 states and 4776 transitions. [2023-08-26 17:52:02,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1398 places, 1633 transitions, 66383 flow [2023-08-26 17:52:41,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1337 places, 1633 transitions, 63778 flow, removed 403 selfloop flow, removed 61 redundant places. [2023-08-26 17:52:41,955 INFO L231 Difference]: Finished difference. Result has 1349 places, 1415 transitions, 50753 flow [2023-08-26 17:52:41,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=46391, PETRI_DIFFERENCE_MINUEND_PLACES=1264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=74, PETRI_FLOW=50753, PETRI_PLACES=1349, PETRI_TRANSITIONS=1415} [2023-08-26 17:52:41,957 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 1327 predicate places. [2023-08-26 17:52:41,957 INFO L495 AbstractCegarLoop]: Abstraction has has 1349 places, 1415 transitions, 50753 flow [2023-08-26 17:52:41,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 61.09090909090909) internal successors, (2688), 44 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:52:41,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:52:41,957 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:52:41,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-26 17:52:42,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-08-26 17:52:42,158 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:52:42,158 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:52:42,158 INFO L85 PathProgramCache]: Analyzing trace with hash -183057076, now seen corresponding path program 31 times [2023-08-26 17:52:42,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:52:42,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746888768] [2023-08-26 17:52:42,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:52:42,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:52:42,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:52:42,814 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:52:42,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:52:42,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746888768] [2023-08-26 17:52:42,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746888768] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:52:42,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840494850] [2023-08-26 17:52:42,815 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 17:52:42,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:52:42,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:52:42,816 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:52:42,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-26 17:52:42,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:52:42,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-26 17:52:42,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:52:43,015 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:52:43,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:52:43,501 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:52:43,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840494850] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:52:43,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:52:43,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 43 [2023-08-26 17:52:43,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859492749] [2023-08-26 17:52:43,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:52:43,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-26 17:52:43,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:52:43,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-26 17:52:43,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=1656, Unknown=0, NotChecked=0, Total=1980 [2023-08-26 17:52:43,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:52:43,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1349 places, 1415 transitions, 50753 flow. Second operand has 45 states, 45 states have (on average 61.111111111111114) internal successors, (2750), 45 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:52:43,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:52:43,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:52:43,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:52:55,862 INFO L124 PetriNetUnfolderBase]: 5604/10763 cut-off events. [2023-08-26 17:52:55,863 INFO L125 PetriNetUnfolderBase]: For 10478417/10478417 co-relation queries the response was YES. [2023-08-26 17:52:56,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302014 conditions, 10763 events. 5604/10763 cut-off events. For 10478417/10478417 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 73159 event pairs, 86 based on Foata normal form. 8/10771 useless extension candidates. Maximal degree in co-relation 301444. Up to 4834 conditions per place. [2023-08-26 17:52:56,507 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 182 selfloop transitions, 1336 changer transitions 149/1667 dead transitions. [2023-08-26 17:52:56,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1425 places, 1667 transitions, 68618 flow [2023-08-26 17:52:56,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-08-26 17:52:56,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2023-08-26 17:52:56,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 4974 transitions. [2023-08-26 17:52:56,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4114484241872777 [2023-08-26 17:52:56,511 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 4974 transitions. [2023-08-26 17:52:56,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 4974 transitions. [2023-08-26 17:52:56,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:52:56,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 4974 transitions. [2023-08-26 17:52:56,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 64.59740259740259) internal successors, (4974), 77 states have internal predecessors, (4974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:52:56,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 157.0) internal successors, (12246), 78 states have internal predecessors, (12246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:52:56,522 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 157.0) internal successors, (12246), 78 states have internal predecessors, (12246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:52:56,523 INFO L175 Difference]: Start difference. First operand has 1349 places, 1415 transitions, 50753 flow. Second operand 77 states and 4974 transitions. [2023-08-26 17:52:56,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1425 places, 1667 transitions, 68618 flow [2023-08-26 17:53:40,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1364 places, 1667 transitions, 65908 flow, removed 417 selfloop flow, removed 61 redundant places. [2023-08-26 17:53:41,013 INFO L231 Difference]: Finished difference. Result has 1375 places, 1438 transitions, 52583 flow [2023-08-26 17:53:41,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=48239, PETRI_DIFFERENCE_MINUEND_PLACES=1288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1313, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=52583, PETRI_PLACES=1375, PETRI_TRANSITIONS=1438} [2023-08-26 17:53:41,014 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 1353 predicate places. [2023-08-26 17:53:41,014 INFO L495 AbstractCegarLoop]: Abstraction has has 1375 places, 1438 transitions, 52583 flow [2023-08-26 17:53:41,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 61.111111111111114) internal successors, (2750), 45 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:53:41,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:53:41,015 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:53:41,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-26 17:53:41,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:53:41,217 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:53:41,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:53:41,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1768231510, now seen corresponding path program 32 times [2023-08-26 17:53:41,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:53:41,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529161986] [2023-08-26 17:53:41,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:53:41,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:53:41,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:53:41,844 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:53:41,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:53:41,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529161986] [2023-08-26 17:53:41,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529161986] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:53:41,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512838467] [2023-08-26 17:53:41,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 17:53:41,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:53:41,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:53:41,846 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:53:41,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-26 17:53:41,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 17:53:41,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:53:41,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-26 17:53:41,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:53:42,008 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:53:42,008 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:53:42,470 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:53:42,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512838467] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:53:42,470 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:53:42,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 42 [2023-08-26 17:53:42,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938295873] [2023-08-26 17:53:42,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:53:42,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-08-26 17:53:42,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:53:42,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-08-26 17:53:42,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=1546, Unknown=0, NotChecked=0, Total=1892 [2023-08-26 17:53:42,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:53:42,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1375 places, 1438 transitions, 52583 flow. Second operand has 44 states, 44 states have (on average 61.09090909090909) internal successors, (2688), 44 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:53:42,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:53:42,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:53:42,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:53:55,843 INFO L124 PetriNetUnfolderBase]: 5684/10923 cut-off events. [2023-08-26 17:53:55,843 INFO L125 PetriNetUnfolderBase]: For 10764877/10764877 co-relation queries the response was YES. [2023-08-26 17:53:56,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308699 conditions, 10923 events. 5684/10923 cut-off events. For 10764877/10764877 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 74562 event pairs, 84 based on Foata normal form. 8/10931 useless extension candidates. Maximal degree in co-relation 308118. Up to 4906 conditions per place. [2023-08-26 17:53:56,531 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 176 selfloop transitions, 1360 changer transitions 147/1683 dead transitions. [2023-08-26 17:53:56,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1450 places, 1683 transitions, 70702 flow [2023-08-26 17:53:56,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-08-26 17:53:56,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2023-08-26 17:53:56,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 4906 transitions. [2023-08-26 17:53:56,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111632584646329 [2023-08-26 17:53:56,534 INFO L72 ComplementDD]: Start complementDD. Operand 76 states and 4906 transitions. [2023-08-26 17:53:56,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 76 states and 4906 transitions. [2023-08-26 17:53:56,535 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:53:56,535 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 76 states and 4906 transitions. [2023-08-26 17:53:56,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 77 states, 76 states have (on average 64.55263157894737) internal successors, (4906), 76 states have internal predecessors, (4906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:53:56,546 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 77 states, 77 states have (on average 157.0) internal successors, (12089), 77 states have internal predecessors, (12089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:53:56,547 INFO L81 ComplementDD]: Finished complementDD. Result has 77 states, 77 states have (on average 157.0) internal successors, (12089), 77 states have internal predecessors, (12089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:53:56,547 INFO L175 Difference]: Start difference. First operand has 1375 places, 1438 transitions, 52583 flow. Second operand 76 states and 4906 transitions. [2023-08-26 17:53:56,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1450 places, 1683 transitions, 70702 flow [2023-08-26 17:54:45,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1385 places, 1683 transitions, 67940 flow, removed 399 selfloop flow, removed 65 redundant places. [2023-08-26 17:54:45,207 INFO L231 Difference]: Finished difference. Result has 1395 places, 1459 transitions, 54321 flow [2023-08-26 17:54:45,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=49993, PETRI_DIFFERENCE_MINUEND_PLACES=1310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1339, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=76, PETRI_FLOW=54321, PETRI_PLACES=1395, PETRI_TRANSITIONS=1459} [2023-08-26 17:54:45,209 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 1373 predicate places. [2023-08-26 17:54:45,209 INFO L495 AbstractCegarLoop]: Abstraction has has 1395 places, 1459 transitions, 54321 flow [2023-08-26 17:54:45,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 61.09090909090909) internal successors, (2688), 44 states have internal predecessors, (2688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:54:45,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:54:45,209 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:54:45,214 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-26 17:54:45,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-26 17:54:45,410 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:54:45,410 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:54:45,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1419842262, now seen corresponding path program 33 times [2023-08-26 17:54:45,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:54:45,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424951114] [2023-08-26 17:54:45,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:54:45,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:54:45,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:54:46,530 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:54:46,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:54:46,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424951114] [2023-08-26 17:54:46,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424951114] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:54:46,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735891386] [2023-08-26 17:54:46,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 17:54:46,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:54:46,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:54:46,531 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:54:46,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-26 17:54:46,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2023-08-26 17:54:46,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:54:46,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 55 conjunts are in the unsatisfiable core [2023-08-26 17:54:46,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:54:46,733 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:54:46,733 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:54:47,091 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:54:47,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735891386] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:54:47,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:54:47,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 43 [2023-08-26 17:54:47,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667826229] [2023-08-26 17:54:47,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:54:47,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-26 17:54:47,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:54:47,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-26 17:54:47,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=1635, Unknown=0, NotChecked=0, Total=1980 [2023-08-26 17:54:47,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:54:47,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1395 places, 1459 transitions, 54321 flow. Second operand has 45 states, 45 states have (on average 61.111111111111114) internal successors, (2750), 45 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:54:47,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:54:47,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:54:47,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:55:00,764 INFO L124 PetriNetUnfolderBase]: 5756/11067 cut-off events. [2023-08-26 17:55:00,764 INFO L125 PetriNetUnfolderBase]: For 11035837/11035837 co-relation queries the response was YES. [2023-08-26 17:55:01,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 315068 conditions, 11067 events. 5756/11067 cut-off events. For 11035837/11035837 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 75805 event pairs, 78 based on Foata normal form. 8/11075 useless extension candidates. Maximal degree in co-relation 314477. Up to 4970 conditions per place. [2023-08-26 17:55:01,380 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 172 selfloop transitions, 1384 changer transitions 149/1705 dead transitions. [2023-08-26 17:55:01,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1471 places, 1705 transitions, 72703 flow [2023-08-26 17:55:01,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-08-26 17:55:01,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2023-08-26 17:55:01,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 4971 transitions. [2023-08-26 17:55:01,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4112002647034494 [2023-08-26 17:55:01,385 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 4971 transitions. [2023-08-26 17:55:01,385 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 4971 transitions. [2023-08-26 17:55:01,385 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:55:01,386 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 4971 transitions. [2023-08-26 17:55:01,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 64.55844155844156) internal successors, (4971), 77 states have internal predecessors, (4971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:55:01,396 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 157.0) internal successors, (12246), 78 states have internal predecessors, (12246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:55:01,397 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 157.0) internal successors, (12246), 78 states have internal predecessors, (12246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:55:01,397 INFO L175 Difference]: Start difference. First operand has 1395 places, 1459 transitions, 54321 flow. Second operand 77 states and 4971 transitions. [2023-08-26 17:55:01,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1471 places, 1705 transitions, 72703 flow [2023-08-26 17:55:41,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1406 places, 1705 transitions, 69827 flow, removed 414 selfloop flow, removed 65 redundant places. [2023-08-26 17:55:41,652 INFO L231 Difference]: Finished difference. Result has 1415 places, 1478 transitions, 55918 flow [2023-08-26 17:55:41,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=51637, PETRI_DIFFERENCE_MINUEND_PLACES=1330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1365, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=55918, PETRI_PLACES=1415, PETRI_TRANSITIONS=1478} [2023-08-26 17:55:41,653 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 1393 predicate places. [2023-08-26 17:55:41,654 INFO L495 AbstractCegarLoop]: Abstraction has has 1415 places, 1478 transitions, 55918 flow [2023-08-26 17:55:41,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 61.111111111111114) internal successors, (2750), 45 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:55:41,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:55:41,654 INFO L208 CegarLoopForPetriNet]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:55:41,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-26 17:55:41,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-26 17:55:41,855 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 17:55:41,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:55:41,855 INFO L85 PathProgramCache]: Analyzing trace with hash -527090976, now seen corresponding path program 34 times [2023-08-26 17:55:41,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:55:41,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004511195] [2023-08-26 17:55:41,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:55:41,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:55:41,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:55:42,661 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:55:42,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:55:42,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004511195] [2023-08-26 17:55:42,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004511195] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:55:42,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716341776] [2023-08-26 17:55:42,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 17:55:42,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:55:42,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:55:42,665 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 17:55:42,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-26 17:55:42,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 17:55:42,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:55:42,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-26 17:55:42,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:55:42,887 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:55:42,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:55:43,388 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:55:43,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716341776] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:55:43,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:55:43,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 43 [2023-08-26 17:55:43,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668876043] [2023-08-26 17:55:43,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:55:43,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-08-26 17:55:43,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:55:43,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-08-26 17:55:43,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1610, Unknown=0, NotChecked=0, Total=1980 [2023-08-26 17:55:43,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 17:55:43,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1415 places, 1478 transitions, 55918 flow. Second operand has 45 states, 45 states have (on average 61.111111111111114) internal successors, (2750), 45 states have internal predecessors, (2750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:55:43,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:55:43,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 17:55:43,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:55:57,339 INFO L124 PetriNetUnfolderBase]: 5812/11179 cut-off events. [2023-08-26 17:55:57,339 INFO L125 PetriNetUnfolderBase]: For 11279610/11279610 co-relation queries the response was YES. [2023-08-26 17:55:57,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320269 conditions, 11179 events. 5812/11179 cut-off events. For 11279610/11279610 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 76825 event pairs, 54 based on Foata normal form. 8/11187 useless extension candidates. Maximal degree in co-relation 319669. Up to 5018 conditions per place. [2023-08-26 17:55:57,902 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 165 selfloop transitions, 1412 changer transitions 157/1734 dead transitions. [2023-08-26 17:55:57,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1495 places, 1734 transitions, 74762 flow [2023-08-26 17:55:57,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-08-26 17:55:57,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2023-08-26 17:55:57,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 5234 transitions. [2023-08-26 17:55:57,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41157505701030117 [2023-08-26 17:55:57,905 INFO L72 ComplementDD]: Start complementDD. Operand 81 states and 5234 transitions. [2023-08-26 17:55:57,905 INFO L73 IsDeterministic]: Start isDeterministic. Operand 81 states and 5234 transitions. [2023-08-26 17:55:57,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:55:57,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 81 states and 5234 transitions. [2023-08-26 17:55:57,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 82 states, 81 states have (on average 64.61728395061728) internal successors, (5234), 81 states have internal predecessors, (5234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:55:57,914 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 82 states, 82 states have (on average 157.0) internal successors, (12874), 82 states have internal predecessors, (12874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:55:57,915 INFO L81 ComplementDD]: Finished complementDD. Result has 82 states, 82 states have (on average 157.0) internal successors, (12874), 82 states have internal predecessors, (12874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:55:57,915 INFO L175 Difference]: Start difference. First operand has 1415 places, 1478 transitions, 55918 flow. Second operand 81 states and 5234 transitions. [2023-08-26 17:55:57,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1495 places, 1734 transitions, 74762 flow Received shutdown request... [2023-08-26 17:56:22,850 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-26 17:56:22,850 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-26 17:56:22,877 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4ASSERT_VIOLATIONASSERT (6 of 7 remaining) [2023-08-26 17:56:22,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-08-26 17:56:23,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-26 17:56:23,083 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-08-26 17:56:23,085 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-08-26 17:56:23,085 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-08-26 17:56:23,085 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-26 17:56:23,085 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-08-26 17:56:23,085 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 7 remaining) [2023-08-26 17:56:23,085 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 7 remaining) [2023-08-26 17:56:23,086 INFO L445 BasicCegarLoop]: Path program histogram: [34, 2, 1, 1, 1, 1] [2023-08-26 17:56:23,088 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 17:56:23,088 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 17:56:23,091 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 05:56:23 BasicIcfg [2023-08-26 17:56:23,091 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 17:56:23,092 INFO L158 Benchmark]: Toolchain (without parser) took 799701.24ms. Allocated memory was 398.5MB in the beginning and 8.0GB in the end (delta: 7.6GB). Free memory was 373.4MB in the beginning and 2.8GB in the end (delta: -2.4GB). Peak memory consumption was 6.0GB. Max. memory is 16.0GB. [2023-08-26 17:56:23,092 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 398.5MB. Free memory is still 374.4MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 17:56:23,092 INFO L158 Benchmark]: CACSL2BoogieTranslator took 428.89ms. Allocated memory is still 398.5MB. Free memory was 373.4MB in the beginning and 354.0MB in the end (delta: 19.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-26 17:56:23,092 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.64ms. Allocated memory is still 398.5MB. Free memory was 354.0MB in the beginning and 351.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 17:56:23,092 INFO L158 Benchmark]: Boogie Preprocessor took 38.44ms. Allocated memory is still 398.5MB. Free memory was 351.9MB in the beginning and 350.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 17:56:23,093 INFO L158 Benchmark]: RCFGBuilder took 364.40ms. Allocated memory is still 398.5MB. Free memory was 350.3MB in the beginning and 337.2MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-26 17:56:23,093 INFO L158 Benchmark]: TraceAbstraction took 798813.08ms. Allocated memory was 398.5MB in the beginning and 8.0GB in the end (delta: 7.6GB). Free memory was 336.3MB in the beginning and 2.8GB in the end (delta: -2.5GB). Peak memory consumption was 5.9GB. Max. memory is 16.0GB. [2023-08-26 17:56:23,094 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 398.5MB. Free memory is still 374.4MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 428.89ms. Allocated memory is still 398.5MB. Free memory was 373.4MB in the beginning and 354.0MB in the end (delta: 19.3MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 43.64ms. Allocated memory is still 398.5MB. Free memory was 354.0MB in the beginning and 351.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 38.44ms. Allocated memory is still 398.5MB. Free memory was 351.9MB in the beginning and 350.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 364.40ms. Allocated memory is still 398.5MB. Free memory was 350.3MB in the beginning and 337.2MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 798813.08ms. Allocated memory was 398.5MB in the beginning and 8.0GB in the end (delta: 7.6GB). Free memory was 336.3MB in the beginning and 2.8GB in the end (delta: -2.5GB). Peak memory consumption was 5.9GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 245]: Unsoundness Warning unspecified type, defaulting to int C: short [245] - GenericResultAtLocation [Line: 245]: Unsoundness Warning unspecified type, defaulting to int C: short [245] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.2s, 75 PlacesBefore, 22 PlacesAfterwards, 74 TransitionsBefore, 18 TransitionsAfterwards, 1440 CoEnabledTransitionPairs, 6 FixpointIterations, 24 TrivialSequentialCompositions, 40 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 14 ConcurrentYvCompositions, 3 ChoiceCompositions, 81 TotalNumberOfCompositions, 1354 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1185, independent: 1156, independent conditional: 0, independent unconditional: 1156, dependent: 29, dependent conditional: 0, dependent unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 799, independent: 787, independent conditional: 0, independent unconditional: 787, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1185, independent: 369, independent conditional: 0, independent unconditional: 369, dependent: 17, dependent conditional: 0, dependent unconditional: 17, unknown: 799, unknown conditional: 0, unknown unconditional: 799] , Statistics on independence cache: Total cache size (in pairs): 19, Positive cache size: 16, Positive conditional cache size: 0, Positive unconditional cache size: 16, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 693]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 713]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 714]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 95 locations, 7 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 798.6s, OverallIterations: 40, TraceHistogramMax: 20, PathProgramHistogramMax: 34, EmptinessCheckTime: 0.0s, AutomataDifference: 748.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 26612 SdHoareTripleChecker+Valid, 8.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 26612 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 6.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 2227 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12600 IncrementalHoareTripleChecker+Invalid, 14827 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2227 mSolverCounterUnsat, 0 mSDtfsCounter, 12600 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5055 GetRequests, 1373 SyntacticMatches, 791 SemanticMatches, 2891 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94985 ImplicationChecksByTransitivity, 55.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=55918occurred in iteration=39, InterpolantAutomatonStates: 1770, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 37.1s InterpolantComputationTime, 2469 NumberOfCodeBlocks, 2468 NumberOfCodeBlocksAsserted, 304 NumberOfCheckSat, 3572 ConstructedInterpolants, 0 QuantifiedInterpolants, 16906 SizeOfPredicates, 949 NumberOfNonLiveVariables, 8314 ConjunctsInSsa, 1146 ConjunctsInUnsatCore, 102 InterpolantComputations, 9 PerfectInterpolantSequences, 24/24951 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown