/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/stack_longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 17:41:58,716 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 17:41:58,802 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 17:41:58,807 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 17:41:58,808 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 17:41:58,838 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 17:41:58,838 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 17:41:58,839 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 17:41:58,839 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 17:41:58,843 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 17:41:58,843 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 17:41:58,844 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 17:41:58,844 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 17:41:58,845 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 17:41:58,845 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 17:41:58,845 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 17:41:58,846 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 17:41:58,846 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 17:41:58,846 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 17:41:58,846 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 17:41:58,847 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 17:41:58,847 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 17:41:58,848 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 17:41:58,848 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 17:41:58,848 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 17:41:58,849 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 17:41:58,849 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 17:41:58,849 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 17:41:58,849 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 17:41:58,850 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 17:41:58,851 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 17:41:58,851 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 17:41:58,851 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 17:41:58,851 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 17:41:58,851 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 17:41:58,852 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 17:41:59,177 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 17:41:59,201 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 17:41:59,203 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 17:41:59,204 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 17:41:59,205 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 17:41:59,206 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longest-2.i [2023-08-26 17:42:00,408 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 17:42:00,742 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 17:42:00,743 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-2.i [2023-08-26 17:42:00,759 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/573362c0a/bec103ee457647709187caf8afd950df/FLAG6f55d3c4a [2023-08-26 17:42:00,775 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/573362c0a/bec103ee457647709187caf8afd950df [2023-08-26 17:42:00,779 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 17:42:00,780 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 17:42:00,783 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 17:42:00,783 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 17:42:00,786 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 17:42:00,786 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 05:42:00" (1/1) ... [2023-08-26 17:42:00,787 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3423bd0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:42:00, skipping insertion in model container [2023-08-26 17:42:00,787 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 05:42:00" (1/1) ... [2023-08-26 17:42:00,843 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 17:42:01,244 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 17:42:01,255 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 17:42:01,272 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-26 17:42:01,274 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-26 17:42:01,294 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [753] [2023-08-26 17:42:01,311 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 17:42:01,362 INFO L206 MainTranslator]: Completed translation [2023-08-26 17:42:01,362 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:42:01 WrapperNode [2023-08-26 17:42:01,362 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 17:42:01,363 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 17:42:01,363 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 17:42:01,363 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 17:42:01,368 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:42:01" (1/1) ... [2023-08-26 17:42:01,383 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:42:01" (1/1) ... [2023-08-26 17:42:01,409 INFO L138 Inliner]: procedures = 277, calls = 39, calls flagged for inlining = 12, calls inlined = 13, statements flattened = 155 [2023-08-26 17:42:01,409 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 17:42:01,410 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 17:42:01,410 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 17:42:01,410 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 17:42:01,418 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:42:01" (1/1) ... [2023-08-26 17:42:01,418 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:42:01" (1/1) ... [2023-08-26 17:42:01,422 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:42:01" (1/1) ... [2023-08-26 17:42:01,422 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:42:01" (1/1) ... [2023-08-26 17:42:01,429 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:42:01" (1/1) ... [2023-08-26 17:42:01,432 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:42:01" (1/1) ... [2023-08-26 17:42:01,434 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:42:01" (1/1) ... [2023-08-26 17:42:01,435 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:42:01" (1/1) ... [2023-08-26 17:42:01,438 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 17:42:01,439 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 17:42:01,439 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 17:42:01,439 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 17:42:01,439 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:42:01" (1/1) ... [2023-08-26 17:42:01,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 17:42:01,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:42:01,478 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 17:42:01,522 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-26 17:42:01,523 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-26 17:42:01,523 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-26 17:42:01,524 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-26 17:42:01,524 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 17:42:01,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 17:42:01,524 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 17:42:01,524 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 17:42:01,525 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 17:42:01,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 17:42:01,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 17:42:01,525 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 17:42:01,525 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 17:42:01,526 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 17:42:01,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-26 17:42:01,655 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 17:42:01,656 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 17:42:01,964 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 17:42:01,972 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 17:42:01,972 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-26 17:42:01,974 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 05:42:01 BoogieIcfgContainer [2023-08-26 17:42:01,974 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 17:42:01,976 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 17:42:01,976 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 17:42:01,979 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 17:42:01,979 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 05:42:00" (1/3) ... [2023-08-26 17:42:01,979 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17b31624 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 05:42:01, skipping insertion in model container [2023-08-26 17:42:01,979 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 05:42:01" (2/3) ... [2023-08-26 17:42:01,980 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17b31624 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 05:42:01, skipping insertion in model container [2023-08-26 17:42:01,980 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 05:42:01" (3/3) ... [2023-08-26 17:42:01,981 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2023-08-26 17:42:01,996 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 17:42:01,996 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2023-08-26 17:42:01,996 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 17:42:02,070 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 17:42:02,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 171 transitions, 358 flow [2023-08-26 17:42:02,171 INFO L124 PetriNetUnfolderBase]: 12/169 cut-off events. [2023-08-26 17:42:02,171 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 17:42:02,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 169 events. 12/169 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 448 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 127. Up to 3 conditions per place. [2023-08-26 17:42:02,179 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 171 transitions, 358 flow [2023-08-26 17:42:02,189 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 160 transitions, 329 flow [2023-08-26 17:42:02,192 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 17:42:02,204 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 155 places, 160 transitions, 329 flow [2023-08-26 17:42:02,210 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 155 places, 160 transitions, 329 flow [2023-08-26 17:42:02,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 160 transitions, 329 flow [2023-08-26 17:42:02,255 INFO L124 PetriNetUnfolderBase]: 12/160 cut-off events. [2023-08-26 17:42:02,255 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 17:42:02,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 160 events. 12/160 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 403 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 127. Up to 3 conditions per place. [2023-08-26 17:42:02,261 INFO L119 LiptonReduction]: Number of co-enabled transitions 8840 [2023-08-26 17:42:06,451 INFO L134 LiptonReduction]: Checked pairs total: 13733 [2023-08-26 17:42:06,451 INFO L136 LiptonReduction]: Total number of compositions: 178 [2023-08-26 17:42:06,463 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 17:42:06,469 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;@643a4225, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 17:42:06,469 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-08-26 17:42:06,470 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 17:42:06,470 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 17:42:06,471 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 17:42:06,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:06,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 17:42:06,472 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:42:06,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:06,476 INFO L85 PathProgramCache]: Analyzing trace with hash 724, now seen corresponding path program 1 times [2023-08-26 17:42:06,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:06,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744415043] [2023-08-26 17:42:06,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:06,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:06,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:06,580 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 17:42:06,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:06,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744415043] [2023-08-26 17:42:06,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744415043] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:06,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:06,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 17:42:06,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142201617] [2023-08-26 17:42:06,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:06,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 17:42:06,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:06,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 17:42:06,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 17:42:06,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 349 [2023-08-26 17:42:06,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 44 transitions, 97 flow. Second operand has 2 states, 2 states have (on average 158.5) internal successors, (317), 2 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:06,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:06,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 349 [2023-08-26 17:42:06,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:06,911 INFO L124 PetriNetUnfolderBase]: 1250/1979 cut-off events. [2023-08-26 17:42:06,911 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2023-08-26 17:42:06,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3939 conditions, 1979 events. 1250/1979 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9271 event pairs, 994 based on Foata normal form. 0/1117 useless extension candidates. Maximal degree in co-relation 3692. Up to 1920 conditions per place. [2023-08-26 17:42:06,926 INFO L140 encePairwiseOnDemand]: 347/349 looper letters, 40 selfloop transitions, 0 changer transitions 0/42 dead transitions. [2023-08-26 17:42:06,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 42 transitions, 173 flow [2023-08-26 17:42:06,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 17:42:06,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 17:42:06,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 358 transitions. [2023-08-26 17:42:06,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5128939828080229 [2023-08-26 17:42:06,941 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 358 transitions. [2023-08-26 17:42:06,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 358 transitions. [2023-08-26 17:42:06,943 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:06,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 358 transitions. [2023-08-26 17:42:06,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 179.0) internal successors, (358), 2 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:06,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 349.0) internal successors, (1047), 3 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:06,954 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 349.0) internal successors, (1047), 3 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:06,956 INFO L175 Difference]: Start difference. First operand has 46 places, 44 transitions, 97 flow. Second operand 2 states and 358 transitions. [2023-08-26 17:42:06,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 42 transitions, 173 flow [2023-08-26 17:42:06,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 42 transitions, 168 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 17:42:06,960 INFO L231 Difference]: Finished difference. Result has 42 places, 42 transitions, 88 flow [2023-08-26 17:42:06,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=88, PETRI_PLACES=42, PETRI_TRANSITIONS=42} [2023-08-26 17:42:06,965 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -4 predicate places. [2023-08-26 17:42:06,965 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 42 transitions, 88 flow [2023-08-26 17:42:06,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 158.5) internal successors, (317), 2 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:06,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:06,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 17:42:06,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 17:42:06,967 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:42:06,967 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:06,967 INFO L85 PathProgramCache]: Analyzing trace with hash 711364, now seen corresponding path program 1 times [2023-08-26 17:42:06,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:06,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462327527] [2023-08-26 17:42:06,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:06,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:06,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:07,156 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 17:42:07,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:07,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462327527] [2023-08-26 17:42:07,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462327527] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:07,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:07,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 17:42:07,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721376039] [2023-08-26 17:42:07,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:07,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:42:07,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:07,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:42:07,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:42:07,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 349 [2023-08-26 17:42:07,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 42 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:07,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:07,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 349 [2023-08-26 17:42:07,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:07,316 INFO L124 PetriNetUnfolderBase]: 1223/1927 cut-off events. [2023-08-26 17:42:07,317 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-26 17:42:07,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3821 conditions, 1927 events. 1223/1927 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8934 event pairs, 972 based on Foata normal form. 0/1099 useless extension candidates. Maximal degree in co-relation 3818. Up to 1868 conditions per place. [2023-08-26 17:42:07,328 INFO L140 encePairwiseOnDemand]: 346/349 looper letters, 37 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-08-26 17:42:07,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 40 transitions, 160 flow [2023-08-26 17:42:07,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:42:07,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:42:07,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 439 transitions. [2023-08-26 17:42:07,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4192932187201528 [2023-08-26 17:42:07,332 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 439 transitions. [2023-08-26 17:42:07,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 439 transitions. [2023-08-26 17:42:07,332 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:07,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 439 transitions. [2023-08-26 17:42:07,334 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:07,337 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:07,338 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:07,338 INFO L175 Difference]: Start difference. First operand has 42 places, 42 transitions, 88 flow. Second operand 3 states and 439 transitions. [2023-08-26 17:42:07,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 40 transitions, 160 flow [2023-08-26 17:42:07,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 40 transitions, 160 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 17:42:07,339 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 86 flow [2023-08-26 17:42:07,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2023-08-26 17:42:07,340 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -4 predicate places. [2023-08-26 17:42:07,340 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 86 flow [2023-08-26 17:42:07,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:07,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:07,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 17:42:07,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 17:42:07,341 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:42:07,342 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:07,342 INFO L85 PathProgramCache]: Analyzing trace with hash 711365, now seen corresponding path program 1 times [2023-08-26 17:42:07,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:07,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643412710] [2023-08-26 17:42:07,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:07,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:07,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:07,430 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 17:42:07,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:07,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643412710] [2023-08-26 17:42:07,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643412710] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:07,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:07,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 17:42:07,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600924714] [2023-08-26 17:42:07,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:07,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:42:07,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:07,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:42:07,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:42:07,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 349 [2023-08-26 17:42:07,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:07,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:07,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 349 [2023-08-26 17:42:07,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:07,584 INFO L124 PetriNetUnfolderBase]: 1196/1875 cut-off events. [2023-08-26 17:42:07,585 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-26 17:42:07,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3720 conditions, 1875 events. 1196/1875 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8614 event pairs, 950 based on Foata normal form. 0/1081 useless extension candidates. Maximal degree in co-relation 3716. Up to 1817 conditions per place. [2023-08-26 17:42:07,597 INFO L140 encePairwiseOnDemand]: 346/349 looper letters, 35 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-08-26 17:42:07,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 38 transitions, 154 flow [2023-08-26 17:42:07,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:42:07,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:42:07,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 443 transitions. [2023-08-26 17:42:07,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42311365807067813 [2023-08-26 17:42:07,600 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 443 transitions. [2023-08-26 17:42:07,600 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 443 transitions. [2023-08-26 17:42:07,601 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:07,601 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 443 transitions. [2023-08-26 17:42:07,602 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:07,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:07,607 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:07,607 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 86 flow. Second operand 3 states and 443 transitions. [2023-08-26 17:42:07,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 38 transitions, 154 flow [2023-08-26 17:42:07,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 38 transitions, 153 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 17:42:07,609 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 83 flow [2023-08-26 17:42:07,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2023-08-26 17:42:07,610 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -5 predicate places. [2023-08-26 17:42:07,610 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 83 flow [2023-08-26 17:42:07,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:07,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:07,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 17:42:07,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 17:42:07,611 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:42:07,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:07,612 INFO L85 PathProgramCache]: Analyzing trace with hash 683639189, now seen corresponding path program 1 times [2023-08-26 17:42:07,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:07,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162720016] [2023-08-26 17:42:07,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:07,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:07,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:07,787 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 17:42:07,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:07,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162720016] [2023-08-26 17:42:07,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162720016] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:07,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:07,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 17:42:07,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312129981] [2023-08-26 17:42:07,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:07,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 17:42:07,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:07,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 17:42:07,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 17:42:07,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 349 [2023-08-26 17:42:07,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 83 flow. Second operand has 4 states, 4 states have (on average 132.25) internal successors, (529), 4 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:07,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:07,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 349 [2023-08-26 17:42:07,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:07,917 INFO L124 PetriNetUnfolderBase]: 875/1397 cut-off events. [2023-08-26 17:42:07,917 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-26 17:42:07,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2779 conditions, 1397 events. 875/1397 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6146 event pairs, 688 based on Foata normal form. 0/868 useless extension candidates. Maximal degree in co-relation 2775. Up to 1353 conditions per place. [2023-08-26 17:42:07,925 INFO L140 encePairwiseOnDemand]: 347/349 looper letters, 34 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-08-26 17:42:07,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 37 transitions, 151 flow [2023-08-26 17:42:07,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:42:07,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:42:07,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 429 transitions. [2023-08-26 17:42:07,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40974212034383956 [2023-08-26 17:42:07,927 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 429 transitions. [2023-08-26 17:42:07,927 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 429 transitions. [2023-08-26 17:42:07,928 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:07,928 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 429 transitions. [2023-08-26 17:42:07,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:07,931 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:07,932 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:07,932 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 83 flow. Second operand 3 states and 429 transitions. [2023-08-26 17:42:07,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 37 transitions, 151 flow [2023-08-26 17:42:07,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 37 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 17:42:07,933 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 82 flow [2023-08-26 17:42:07,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-08-26 17:42:07,934 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -5 predicate places. [2023-08-26 17:42:07,934 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 82 flow [2023-08-26 17:42:07,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 132.25) internal successors, (529), 4 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:07,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:07,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 17:42:07,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 17:42:07,935 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:42:07,935 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:07,936 INFO L85 PathProgramCache]: Analyzing trace with hash 683639188, now seen corresponding path program 1 times [2023-08-26 17:42:07,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:07,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054751247] [2023-08-26 17:42:07,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:07,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:07,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:07,985 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 17:42:07,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:07,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054751247] [2023-08-26 17:42:07,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054751247] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:07,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:07,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 17:42:07,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881186637] [2023-08-26 17:42:07,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:07,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 17:42:07,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:07,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 17:42:07,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 17:42:07,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 349 [2023-08-26 17:42:07,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 82 flow. Second operand has 4 states, 4 states have (on average 131.25) internal successors, (525), 4 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:07,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:07,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 349 [2023-08-26 17:42:07,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:08,079 INFO L124 PetriNetUnfolderBase]: 554/919 cut-off events. [2023-08-26 17:42:08,079 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-26 17:42:08,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1838 conditions, 919 events. 554/919 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3846 event pairs, 426 based on Foata normal form. 0/655 useless extension candidates. Maximal degree in co-relation 1834. Up to 889 conditions per place. [2023-08-26 17:42:08,084 INFO L140 encePairwiseOnDemand]: 347/349 looper letters, 33 selfloop transitions, 1 changer transitions 0/36 dead transitions. [2023-08-26 17:42:08,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 36 transitions, 148 flow [2023-08-26 17:42:08,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:42:08,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:42:08,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 425 transitions. [2023-08-26 17:42:08,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4059216809933142 [2023-08-26 17:42:08,087 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 425 transitions. [2023-08-26 17:42:08,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 425 transitions. [2023-08-26 17:42:08,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:08,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 425 transitions. [2023-08-26 17:42:08,088 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:08,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:08,091 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:08,091 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 82 flow. Second operand 3 states and 425 transitions. [2023-08-26 17:42:08,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 36 transitions, 148 flow [2023-08-26 17:42:08,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 36 transitions, 147 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 17:42:08,092 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 81 flow [2023-08-26 17:42:08,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2023-08-26 17:42:08,093 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -5 predicate places. [2023-08-26 17:42:08,093 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 81 flow [2023-08-26 17:42:08,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 131.25) internal successors, (525), 4 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:08,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:08,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 17:42:08,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 17:42:08,094 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:42:08,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:08,095 INFO L85 PathProgramCache]: Analyzing trace with hash -281769903, now seen corresponding path program 1 times [2023-08-26 17:42:08,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:08,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139949582] [2023-08-26 17:42:08,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:08,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:08,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:08,210 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 17:42:08,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:08,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139949582] [2023-08-26 17:42:08,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139949582] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:08,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:08,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 17:42:08,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963945777] [2023-08-26 17:42:08,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:08,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 17:42:08,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:08,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 17:42:08,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 17:42:08,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 349 [2023-08-26 17:42:08,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 81 flow. Second operand has 5 states, 5 states have (on average 131.2) internal successors, (656), 5 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:08,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:08,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 349 [2023-08-26 17:42:08,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:08,409 INFO L124 PetriNetUnfolderBase]: 629/1052 cut-off events. [2023-08-26 17:42:08,409 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-26 17:42:08,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2103 conditions, 1052 events. 629/1052 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4940 event pairs, 114 based on Foata normal form. 0/772 useless extension candidates. Maximal degree in co-relation 2099. Up to 668 conditions per place. [2023-08-26 17:42:08,415 INFO L140 encePairwiseOnDemand]: 344/349 looper letters, 68 selfloop transitions, 5 changer transitions 0/75 dead transitions. [2023-08-26 17:42:08,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 75 transitions, 310 flow [2023-08-26 17:42:08,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 17:42:08,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 17:42:08,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 724 transitions. [2023-08-26 17:42:08,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41489971346704874 [2023-08-26 17:42:08,418 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 724 transitions. [2023-08-26 17:42:08,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 724 transitions. [2023-08-26 17:42:08,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:08,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 724 transitions. [2023-08-26 17:42:08,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 144.8) internal successors, (724), 5 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:08,423 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 349.0) internal successors, (2094), 6 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:08,425 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 349.0) internal successors, (2094), 6 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:08,425 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 81 flow. Second operand 5 states and 724 transitions. [2023-08-26 17:42:08,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 75 transitions, 310 flow [2023-08-26 17:42:08,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 75 transitions, 309 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 17:42:08,428 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 90 flow [2023-08-26 17:42:08,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=90, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2023-08-26 17:42:08,430 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -3 predicate places. [2023-08-26 17:42:08,430 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 90 flow [2023-08-26 17:42:08,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 131.2) internal successors, (656), 5 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:08,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:08,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 17:42:08,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 17:42:08,431 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:42:08,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:08,432 INFO L85 PathProgramCache]: Analyzing trace with hash -281769902, now seen corresponding path program 1 times [2023-08-26 17:42:08,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:08,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140006278] [2023-08-26 17:42:08,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:08,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:08,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:08,710 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 17:42:08,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:08,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140006278] [2023-08-26 17:42:08,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140006278] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:08,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:08,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 17:42:08,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266677497] [2023-08-26 17:42:08,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:08,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 17:42:08,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:08,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 17:42:08,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 17:42:08,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 349 [2023-08-26 17:42:08,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 90 flow. Second operand has 5 states, 5 states have (on average 121.2) internal successors, (606), 5 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:08,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:08,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 349 [2023-08-26 17:42:08,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:08,983 INFO L124 PetriNetUnfolderBase]: 689/1124 cut-off events. [2023-08-26 17:42:08,983 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2023-08-26 17:42:08,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2408 conditions, 1124 events. 689/1124 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 4282 event pairs, 222 based on Foata normal form. 0/884 useless extension candidates. Maximal degree in co-relation 2404. Up to 883 conditions per place. [2023-08-26 17:42:08,990 INFO L140 encePairwiseOnDemand]: 342/349 looper letters, 61 selfloop transitions, 4 changer transitions 3/68 dead transitions. [2023-08-26 17:42:08,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 68 transitions, 299 flow [2023-08-26 17:42:08,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 17:42:08,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 17:42:08,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 673 transitions. [2023-08-26 17:42:08,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3856733524355301 [2023-08-26 17:42:08,993 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 673 transitions. [2023-08-26 17:42:08,993 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 673 transitions. [2023-08-26 17:42:08,994 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:08,994 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 673 transitions. [2023-08-26 17:42:08,996 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 134.6) internal successors, (673), 5 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:08,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 349.0) internal successors, (2094), 6 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:08,999 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 349.0) internal successors, (2094), 6 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:08,999 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 90 flow. Second operand 5 states and 673 transitions. [2023-08-26 17:42:08,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 68 transitions, 299 flow [2023-08-26 17:42:09,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 68 transitions, 293 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 17:42:09,006 INFO L231 Difference]: Finished difference. Result has 48 places, 38 transitions, 118 flow [2023-08-26 17:42:09,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=118, PETRI_PLACES=48, PETRI_TRANSITIONS=38} [2023-08-26 17:42:09,007 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2023-08-26 17:42:09,007 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 118 flow [2023-08-26 17:42:09,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 121.2) internal successors, (606), 5 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:09,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:09,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:42:09,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 17:42:09,010 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:42:09,010 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:09,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1293271885, now seen corresponding path program 1 times [2023-08-26 17:42:09,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:09,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109417113] [2023-08-26 17:42:09,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:09,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:09,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:09,068 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 17:42:09,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:09,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109417113] [2023-08-26 17:42:09,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109417113] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:09,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:09,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 17:42:09,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647082065] [2023-08-26 17:42:09,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:09,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:42:09,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:09,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:42:09,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:42:09,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 349 [2023-08-26 17:42:09,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:09,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:09,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 349 [2023-08-26 17:42:09,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:09,201 INFO L124 PetriNetUnfolderBase]: 615/1050 cut-off events. [2023-08-26 17:42:09,201 INFO L125 PetriNetUnfolderBase]: For 230/230 co-relation queries the response was YES. [2023-08-26 17:42:09,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2402 conditions, 1050 events. 615/1050 cut-off events. For 230/230 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4603 event pairs, 276 based on Foata normal form. 0/866 useless extension candidates. Maximal degree in co-relation 2395. Up to 918 conditions per place. [2023-08-26 17:42:09,207 INFO L140 encePairwiseOnDemand]: 346/349 looper letters, 52 selfloop transitions, 3 changer transitions 0/57 dead transitions. [2023-08-26 17:42:09,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 57 transitions, 274 flow [2023-08-26 17:42:09,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:42:09,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:42:09,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 509 transitions. [2023-08-26 17:42:09,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48615090735434574 [2023-08-26 17:42:09,210 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 509 transitions. [2023-08-26 17:42:09,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 509 transitions. [2023-08-26 17:42:09,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:09,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 509 transitions. [2023-08-26 17:42:09,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:09,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:09,215 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:09,215 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 118 flow. Second operand 3 states and 509 transitions. [2023-08-26 17:42:09,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 57 transitions, 274 flow [2023-08-26 17:42:09,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 57 transitions, 270 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 17:42:09,218 INFO L231 Difference]: Finished difference. Result has 49 places, 39 transitions, 129 flow [2023-08-26 17:42:09,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=49, PETRI_TRANSITIONS=39} [2023-08-26 17:42:09,220 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 3 predicate places. [2023-08-26 17:42:09,220 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 39 transitions, 129 flow [2023-08-26 17:42:09,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:09,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:09,220 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:42:09,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 17:42:09,221 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:42:09,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:09,221 INFO L85 PathProgramCache]: Analyzing trace with hash -2004663441, now seen corresponding path program 1 times [2023-08-26 17:42:09,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:09,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130614565] [2023-08-26 17:42:09,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:09,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:09,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:09,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:42:09,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:09,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130614565] [2023-08-26 17:42:09,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130614565] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:42:09,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646542673] [2023-08-26 17:42:09,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:09,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:42:09,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:42:09,562 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 17:42:09,569 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 17:42:09,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:09,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-26 17:42:09,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:42:09,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 17:42:09,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 17:42:09,761 INFO L322 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-26 17:42:09,761 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 23 [2023-08-26 17:42:09,787 INFO L322 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-26 17:42:09,787 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-08-26 17:42:10,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:42:10,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:42:10,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:42:10,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646542673] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:42:10,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:42:10,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 19 [2023-08-26 17:42:10,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813341323] [2023-08-26 17:42:10,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:42:10,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-26 17:42:10,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:10,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-26 17:42:10,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-08-26 17:42:10,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 349 [2023-08-26 17:42:10,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 39 transitions, 129 flow. Second operand has 21 states, 21 states have (on average 119.85714285714286) internal successors, (2517), 21 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:10,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:10,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 349 [2023-08-26 17:42:10,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:11,368 INFO L124 PetriNetUnfolderBase]: 1693/2768 cut-off events. [2023-08-26 17:42:11,369 INFO L125 PetriNetUnfolderBase]: For 974/974 co-relation queries the response was YES. [2023-08-26 17:42:11,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6756 conditions, 2768 events. 1693/2768 cut-off events. For 974/974 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 12943 event pairs, 192 based on Foata normal form. 66/2402 useless extension candidates. Maximal degree in co-relation 6748. Up to 1025 conditions per place. [2023-08-26 17:42:11,388 INFO L140 encePairwiseOnDemand]: 339/349 looper letters, 195 selfloop transitions, 22 changer transitions 3/220 dead transitions. [2023-08-26 17:42:11,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 220 transitions, 1043 flow [2023-08-26 17:42:11,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 17:42:11,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 17:42:11,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1881 transitions. [2023-08-26 17:42:11,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3849774866966844 [2023-08-26 17:42:11,394 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1881 transitions. [2023-08-26 17:42:11,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1881 transitions. [2023-08-26 17:42:11,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:11,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1881 transitions. [2023-08-26 17:42:11,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 134.35714285714286) internal successors, (1881), 14 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:11,405 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 349.0) internal successors, (5235), 15 states have internal predecessors, (5235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:11,406 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 349.0) internal successors, (5235), 15 states have internal predecessors, (5235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:11,407 INFO L175 Difference]: Start difference. First operand has 49 places, 39 transitions, 129 flow. Second operand 14 states and 1881 transitions. [2023-08-26 17:42:11,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 220 transitions, 1043 flow [2023-08-26 17:42:11,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 220 transitions, 1034 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 17:42:11,413 INFO L231 Difference]: Finished difference. Result has 68 places, 58 transitions, 295 flow [2023-08-26 17:42:11,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=295, PETRI_PLACES=68, PETRI_TRANSITIONS=58} [2023-08-26 17:42:11,414 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 22 predicate places. [2023-08-26 17:42:11,414 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 58 transitions, 295 flow [2023-08-26 17:42:11,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 119.85714285714286) internal successors, (2517), 21 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:11,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:11,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:42:11,425 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 17:42:11,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:42:11,621 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:42:11,622 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:11,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1318318509, now seen corresponding path program 1 times [2023-08-26 17:42:11,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:11,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604477176] [2023-08-26 17:42:11,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:11,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:11,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:11,698 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 17:42:11,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:11,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604477176] [2023-08-26 17:42:11,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604477176] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:11,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:11,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 17:42:11,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675117771] [2023-08-26 17:42:11,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:11,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:42:11,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:11,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:42:11,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:42:11,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 349 [2023-08-26 17:42:11,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 58 transitions, 295 flow. Second operand has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:11,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:11,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 349 [2023-08-26 17:42:11,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:11,848 INFO L124 PetriNetUnfolderBase]: 509/978 cut-off events. [2023-08-26 17:42:11,849 INFO L125 PetriNetUnfolderBase]: For 868/868 co-relation queries the response was YES. [2023-08-26 17:42:11,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2708 conditions, 978 events. 509/978 cut-off events. For 868/868 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 4195 event pairs, 86 based on Foata normal form. 42/946 useless extension candidates. Maximal degree in co-relation 2693. Up to 691 conditions per place. [2023-08-26 17:42:11,859 INFO L140 encePairwiseOnDemand]: 344/349 looper letters, 46 selfloop transitions, 9 changer transitions 0/59 dead transitions. [2023-08-26 17:42:11,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 59 transitions, 384 flow [2023-08-26 17:42:11,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:42:11,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:42:11,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 485 transitions. [2023-08-26 17:42:11,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46322827125119387 [2023-08-26 17:42:11,861 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 485 transitions. [2023-08-26 17:42:11,861 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 485 transitions. [2023-08-26 17:42:11,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:11,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 485 transitions. [2023-08-26 17:42:11,863 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:11,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:11,865 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:11,865 INFO L175 Difference]: Start difference. First operand has 68 places, 58 transitions, 295 flow. Second operand 3 states and 485 transitions. [2023-08-26 17:42:11,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 59 transitions, 384 flow [2023-08-26 17:42:11,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 59 transitions, 352 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-08-26 17:42:11,873 INFO L231 Difference]: Finished difference. Result has 64 places, 50 transitions, 239 flow [2023-08-26 17:42:11,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=239, PETRI_PLACES=64, PETRI_TRANSITIONS=50} [2023-08-26 17:42:11,874 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 18 predicate places. [2023-08-26 17:42:11,874 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 50 transitions, 239 flow [2023-08-26 17:42:11,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:11,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:11,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:42:11,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 17:42:11,875 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:42:11,875 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:11,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1574545704, now seen corresponding path program 1 times [2023-08-26 17:42:11,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:11,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129843208] [2023-08-26 17:42:11,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:11,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:11,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:11,953 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 17:42:11,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:11,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129843208] [2023-08-26 17:42:11,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129843208] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:11,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:11,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 17:42:11,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573472839] [2023-08-26 17:42:11,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:11,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 17:42:11,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:11,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 17:42:11,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-26 17:42:11,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 349 [2023-08-26 17:42:11,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 50 transitions, 239 flow. Second operand has 7 states, 7 states have (on average 129.57142857142858) internal successors, (907), 7 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:11,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:11,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 349 [2023-08-26 17:42:11,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:12,223 INFO L124 PetriNetUnfolderBase]: 647/1228 cut-off events. [2023-08-26 17:42:12,224 INFO L125 PetriNetUnfolderBase]: For 553/553 co-relation queries the response was YES. [2023-08-26 17:42:12,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3349 conditions, 1228 events. 647/1228 cut-off events. For 553/553 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 5381 event pairs, 69 based on Foata normal form. 0/1210 useless extension candidates. Maximal degree in co-relation 3334. Up to 544 conditions per place. [2023-08-26 17:42:12,231 INFO L140 encePairwiseOnDemand]: 341/349 looper letters, 67 selfloop transitions, 20 changer transitions 3/94 dead transitions. [2023-08-26 17:42:12,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 94 transitions, 589 flow [2023-08-26 17:42:12,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 17:42:12,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 17:42:12,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1090 transitions. [2023-08-26 17:42:12,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39040114613180515 [2023-08-26 17:42:12,235 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1090 transitions. [2023-08-26 17:42:12,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1090 transitions. [2023-08-26 17:42:12,236 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:12,236 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1090 transitions. [2023-08-26 17:42:12,238 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 136.25) internal successors, (1090), 8 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:12,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 349.0) internal successors, (3141), 9 states have internal predecessors, (3141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:12,242 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 349.0) internal successors, (3141), 9 states have internal predecessors, (3141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:12,242 INFO L175 Difference]: Start difference. First operand has 64 places, 50 transitions, 239 flow. Second operand 8 states and 1090 transitions. [2023-08-26 17:42:12,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 94 transitions, 589 flow [2023-08-26 17:42:12,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 94 transitions, 568 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-26 17:42:12,247 INFO L231 Difference]: Finished difference. Result has 71 places, 58 transitions, 339 flow [2023-08-26 17:42:12,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=339, PETRI_PLACES=71, PETRI_TRANSITIONS=58} [2023-08-26 17:42:12,247 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 25 predicate places. [2023-08-26 17:42:12,247 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 58 transitions, 339 flow [2023-08-26 17:42:12,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 129.57142857142858) internal successors, (907), 7 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:12,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:12,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:42:12,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 17:42:12,248 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:42:12,249 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:12,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1686574283, now seen corresponding path program 1 times [2023-08-26 17:42:12,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:12,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631240136] [2023-08-26 17:42:12,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:12,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:12,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:12,573 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 17:42:12,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:12,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631240136] [2023-08-26 17:42:12,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631240136] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:12,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:12,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-26 17:42:12,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573292942] [2023-08-26 17:42:12,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:12,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 17:42:12,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:12,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 17:42:12,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-08-26 17:42:12,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 349 [2023-08-26 17:42:12,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 58 transitions, 339 flow. Second operand has 13 states, 13 states have (on average 112.46153846153847) internal successors, (1462), 13 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:12,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:12,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 349 [2023-08-26 17:42:12,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:13,346 INFO L124 PetriNetUnfolderBase]: 874/1589 cut-off events. [2023-08-26 17:42:13,346 INFO L125 PetriNetUnfolderBase]: For 785/785 co-relation queries the response was YES. [2023-08-26 17:42:13,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4537 conditions, 1589 events. 874/1589 cut-off events. For 785/785 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 7195 event pairs, 192 based on Foata normal form. 12/1537 useless extension candidates. Maximal degree in co-relation 4519. Up to 944 conditions per place. [2023-08-26 17:42:13,356 INFO L140 encePairwiseOnDemand]: 335/349 looper letters, 138 selfloop transitions, 16 changer transitions 3/157 dead transitions. [2023-08-26 17:42:13,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 157 transitions, 984 flow [2023-08-26 17:42:13,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-26 17:42:13,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-26 17:42:13,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1588 transitions. [2023-08-26 17:42:13,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3500110204981265 [2023-08-26 17:42:13,362 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1588 transitions. [2023-08-26 17:42:13,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1588 transitions. [2023-08-26 17:42:13,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:13,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1588 transitions. [2023-08-26 17:42:13,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 122.15384615384616) internal successors, (1588), 13 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:13,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 349.0) internal successors, (4886), 14 states have internal predecessors, (4886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:13,372 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 349.0) internal successors, (4886), 14 states have internal predecessors, (4886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:13,372 INFO L175 Difference]: Start difference. First operand has 71 places, 58 transitions, 339 flow. Second operand 13 states and 1588 transitions. [2023-08-26 17:42:13,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 157 transitions, 984 flow [2023-08-26 17:42:13,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 157 transitions, 916 flow, removed 11 selfloop flow, removed 4 redundant places. [2023-08-26 17:42:13,380 INFO L231 Difference]: Finished difference. Result has 85 places, 67 transitions, 414 flow [2023-08-26 17:42:13,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=414, PETRI_PLACES=85, PETRI_TRANSITIONS=67} [2023-08-26 17:42:13,381 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 39 predicate places. [2023-08-26 17:42:13,381 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 67 transitions, 414 flow [2023-08-26 17:42:13,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 112.46153846153847) internal successors, (1462), 13 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:13,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:13,382 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-08-26 17:42:13,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 17:42:13,382 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:42:13,382 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:13,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1145158303, now seen corresponding path program 1 times [2023-08-26 17:42:13,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:13,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99465091] [2023-08-26 17:42:13,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:13,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:13,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:13,492 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:42:13,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:13,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99465091] [2023-08-26 17:42:13,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99465091] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:42:13,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189588009] [2023-08-26 17:42:13,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:13,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:42:13,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:42:13,494 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 17:42:13,498 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 17:42:13,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:13,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 17:42:13,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:42:13,673 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:42:13,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:42:13,725 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:42:13,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189588009] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:42:13,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:42:13,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-26 17:42:13,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69367440] [2023-08-26 17:42:13,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:42:13,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 17:42:13,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:13,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 17:42:13,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-08-26 17:42:13,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 349 [2023-08-26 17:42:13,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 67 transitions, 414 flow. Second operand has 14 states, 14 states have (on average 146.42857142857142) internal successors, (2050), 14 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:13,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:13,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 349 [2023-08-26 17:42:13,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:14,292 INFO L124 PetriNetUnfolderBase]: 1748/3197 cut-off events. [2023-08-26 17:42:14,292 INFO L125 PetriNetUnfolderBase]: For 2452/2452 co-relation queries the response was YES. [2023-08-26 17:42:14,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9365 conditions, 3197 events. 1748/3197 cut-off events. For 2452/2452 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 15295 event pairs, 452 based on Foata normal form. 92/3249 useless extension candidates. Maximal degree in co-relation 9341. Up to 756 conditions per place. [2023-08-26 17:42:14,318 INFO L140 encePairwiseOnDemand]: 341/349 looper letters, 196 selfloop transitions, 41 changer transitions 3/240 dead transitions. [2023-08-26 17:42:14,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 240 transitions, 1690 flow [2023-08-26 17:42:14,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-26 17:42:14,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-26 17:42:14,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2049 transitions. [2023-08-26 17:42:14,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45162001322459777 [2023-08-26 17:42:14,324 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2049 transitions. [2023-08-26 17:42:14,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2049 transitions. [2023-08-26 17:42:14,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:14,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2049 transitions. [2023-08-26 17:42:14,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 157.6153846153846) internal successors, (2049), 13 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:14,334 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 349.0) internal successors, (4886), 14 states have internal predecessors, (4886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:14,335 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 349.0) internal successors, (4886), 14 states have internal predecessors, (4886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:14,335 INFO L175 Difference]: Start difference. First operand has 85 places, 67 transitions, 414 flow. Second operand 13 states and 2049 transitions. [2023-08-26 17:42:14,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 240 transitions, 1690 flow [2023-08-26 17:42:14,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 240 transitions, 1674 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-26 17:42:14,354 INFO L231 Difference]: Finished difference. Result has 100 places, 98 transitions, 801 flow [2023-08-26 17:42:14,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=801, PETRI_PLACES=100, PETRI_TRANSITIONS=98} [2023-08-26 17:42:14,355 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 54 predicate places. [2023-08-26 17:42:14,355 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 98 transitions, 801 flow [2023-08-26 17:42:14,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 146.42857142857142) internal successors, (2050), 14 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:14,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:14,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:42:14,368 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 17:42:14,561 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,SelfDestructingSolverStorable12 [2023-08-26 17:42:14,562 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:42:14,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:14,562 INFO L85 PathProgramCache]: Analyzing trace with hash -309886205, now seen corresponding path program 1 times [2023-08-26 17:42:14,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:14,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453832511] [2023-08-26 17:42:14,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:14,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:14,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:15,234 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 17:42:15,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:15,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453832511] [2023-08-26 17:42:15,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453832511] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:15,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:15,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-26 17:42:15,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992409483] [2023-08-26 17:42:15,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:15,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-26 17:42:15,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:15,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-26 17:42:15,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-08-26 17:42:15,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 349 [2023-08-26 17:42:15,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 98 transitions, 801 flow. Second operand has 15 states, 15 states have (on average 106.4) internal successors, (1596), 15 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:15,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:15,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 349 [2023-08-26 17:42:15,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:16,534 INFO L124 PetriNetUnfolderBase]: 2012/3687 cut-off events. [2023-08-26 17:42:16,535 INFO L125 PetriNetUnfolderBase]: For 4642/4642 co-relation queries the response was YES. [2023-08-26 17:42:16,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11685 conditions, 3687 events. 2012/3687 cut-off events. For 4642/4642 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 18482 event pairs, 626 based on Foata normal form. 0/3643 useless extension candidates. Maximal degree in co-relation 11653. Up to 3035 conditions per place. [2023-08-26 17:42:16,562 INFO L140 encePairwiseOnDemand]: 333/349 looper letters, 173 selfloop transitions, 27 changer transitions 4/204 dead transitions. [2023-08-26 17:42:16,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 204 transitions, 1609 flow [2023-08-26 17:42:16,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-26 17:42:16,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-26 17:42:16,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2033 transitions. [2023-08-26 17:42:16,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3236230499840815 [2023-08-26 17:42:16,568 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2033 transitions. [2023-08-26 17:42:16,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2033 transitions. [2023-08-26 17:42:16,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:16,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2033 transitions. [2023-08-26 17:42:16,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 112.94444444444444) internal successors, (2033), 18 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:16,579 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 349.0) internal successors, (6631), 19 states have internal predecessors, (6631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:16,580 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 349.0) internal successors, (6631), 19 states have internal predecessors, (6631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:16,580 INFO L175 Difference]: Start difference. First operand has 100 places, 98 transitions, 801 flow. Second operand 18 states and 2033 transitions. [2023-08-26 17:42:16,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 204 transitions, 1609 flow [2023-08-26 17:42:16,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 204 transitions, 1524 flow, removed 39 selfloop flow, removed 2 redundant places. [2023-08-26 17:42:16,609 INFO L231 Difference]: Finished difference. Result has 123 places, 121 transitions, 943 flow [2023-08-26 17:42:16,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=731, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=943, PETRI_PLACES=123, PETRI_TRANSITIONS=121} [2023-08-26 17:42:16,610 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 77 predicate places. [2023-08-26 17:42:16,610 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 121 transitions, 943 flow [2023-08-26 17:42:16,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 106.4) internal successors, (1596), 15 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:16,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:16,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:42:16,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 17:42:16,611 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:42:16,615 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:16,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1697843001, now seen corresponding path program 2 times [2023-08-26 17:42:16,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:16,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091711317] [2023-08-26 17:42:16,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:16,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:16,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:17,271 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 17:42:17,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:17,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091711317] [2023-08-26 17:42:17,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091711317] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:17,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:17,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-26 17:42:17,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307048465] [2023-08-26 17:42:17,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:17,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-26 17:42:17,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:17,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-26 17:42:17,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-08-26 17:42:17,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 349 [2023-08-26 17:42:17,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 121 transitions, 943 flow. Second operand has 11 states, 11 states have (on average 116.81818181818181) internal successors, (1285), 11 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:17,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:17,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 349 [2023-08-26 17:42:17,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:18,313 INFO L124 PetriNetUnfolderBase]: 2006/3833 cut-off events. [2023-08-26 17:42:18,313 INFO L125 PetriNetUnfolderBase]: For 4290/4290 co-relation queries the response was YES. [2023-08-26 17:42:18,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11932 conditions, 3833 events. 2006/3833 cut-off events. For 4290/4290 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 20709 event pairs, 611 based on Foata normal form. 0/3776 useless extension candidates. Maximal degree in co-relation 11893. Up to 2244 conditions per place. [2023-08-26 17:42:18,349 INFO L140 encePairwiseOnDemand]: 340/349 looper letters, 145 selfloop transitions, 19 changer transitions 3/184 dead transitions. [2023-08-26 17:42:18,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 184 transitions, 1509 flow [2023-08-26 17:42:18,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 17:42:18,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 17:42:18,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1143 transitions. [2023-08-26 17:42:18,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3638968481375358 [2023-08-26 17:42:18,353 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1143 transitions. [2023-08-26 17:42:18,353 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1143 transitions. [2023-08-26 17:42:18,353 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:18,353 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1143 transitions. [2023-08-26 17:42:18,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 127.0) internal successors, (1143), 9 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:18,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 349.0) internal successors, (3490), 10 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:18,359 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 349.0) internal successors, (3490), 10 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:18,359 INFO L175 Difference]: Start difference. First operand has 123 places, 121 transitions, 943 flow. Second operand 9 states and 1143 transitions. [2023-08-26 17:42:18,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 184 transitions, 1509 flow [2023-08-26 17:42:18,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 184 transitions, 1498 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 17:42:18,387 INFO L231 Difference]: Finished difference. Result has 130 places, 125 transitions, 1007 flow [2023-08-26 17:42:18,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=932, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1007, PETRI_PLACES=130, PETRI_TRANSITIONS=125} [2023-08-26 17:42:18,387 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 84 predicate places. [2023-08-26 17:42:18,388 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 125 transitions, 1007 flow [2023-08-26 17:42:18,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 116.81818181818181) internal successors, (1285), 11 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:18,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:18,388 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:42:18,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 17:42:18,388 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:42:18,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:18,389 INFO L85 PathProgramCache]: Analyzing trace with hash -623392431, now seen corresponding path program 1 times [2023-08-26 17:42:18,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:18,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158600599] [2023-08-26 17:42:18,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:18,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:18,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:18,425 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-26 17:42:18,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:18,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158600599] [2023-08-26 17:42:18,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158600599] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:18,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:18,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 17:42:18,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349332192] [2023-08-26 17:42:18,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:18,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 17:42:18,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:18,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 17:42:18,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 17:42:18,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 349 [2023-08-26 17:42:18,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 125 transitions, 1007 flow. Second operand has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:18,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:18,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 349 [2023-08-26 17:42:18,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:18,958 INFO L124 PetriNetUnfolderBase]: 2146/3975 cut-off events. [2023-08-26 17:42:18,958 INFO L125 PetriNetUnfolderBase]: For 4845/4845 co-relation queries the response was YES. [2023-08-26 17:42:18,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12794 conditions, 3975 events. 2146/3975 cut-off events. For 4845/4845 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 20560 event pairs, 1342 based on Foata normal form. 90/4035 useless extension candidates. Maximal degree in co-relation 12752. Up to 2912 conditions per place. [2023-08-26 17:42:18,990 INFO L140 encePairwiseOnDemand]: 343/349 looper letters, 116 selfloop transitions, 18 changer transitions 0/134 dead transitions. [2023-08-26 17:42:18,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 134 transitions, 1289 flow [2023-08-26 17:42:18,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 17:42:18,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 17:42:18,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 489 transitions. [2023-08-26 17:42:18,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4670487106017192 [2023-08-26 17:42:18,991 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 489 transitions. [2023-08-26 17:42:18,992 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 489 transitions. [2023-08-26 17:42:18,992 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:18,992 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 489 transitions. [2023-08-26 17:42:18,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:18,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:18,994 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:18,994 INFO L175 Difference]: Start difference. First operand has 130 places, 125 transitions, 1007 flow. Second operand 3 states and 489 transitions. [2023-08-26 17:42:18,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 134 transitions, 1289 flow [2023-08-26 17:42:19,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 134 transitions, 1252 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-08-26 17:42:19,018 INFO L231 Difference]: Finished difference. Result has 129 places, 115 transitions, 981 flow [2023-08-26 17:42:19,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=981, PETRI_PLACES=129, PETRI_TRANSITIONS=115} [2023-08-26 17:42:19,019 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 83 predicate places. [2023-08-26 17:42:19,019 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 115 transitions, 981 flow [2023-08-26 17:42:19,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:19,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:19,019 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:42:19,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 17:42:19,020 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:42:19,020 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:19,020 INFO L85 PathProgramCache]: Analyzing trace with hash 449939420, now seen corresponding path program 1 times [2023-08-26 17:42:19,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:19,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846893465] [2023-08-26 17:42:19,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:19,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:19,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:19,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:42:19,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:19,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846893465] [2023-08-26 17:42:19,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846893465] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:42:19,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034375080] [2023-08-26 17:42:19,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:19,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:42:19,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:42:19,418 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 17:42:19,420 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 17:42:19,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:19,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-26 17:42:19,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:42:19,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:42:19,963 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:42:20,249 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 17:42:20,249 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 39 [2023-08-26 17:42:20,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:42:20,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034375080] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:42:20,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:42:20,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 38 [2023-08-26 17:42:20,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739659636] [2023-08-26 17:42:20,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:42:20,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-26 17:42:20,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:20,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-26 17:42:20,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1391, Unknown=0, NotChecked=0, Total=1560 [2023-08-26 17:42:20,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 349 [2023-08-26 17:42:20,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 115 transitions, 981 flow. Second operand has 40 states, 40 states have (on average 112.8) internal successors, (4512), 40 states have internal predecessors, (4512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:20,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:20,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 349 [2023-08-26 17:42:20,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:25,155 INFO L124 PetriNetUnfolderBase]: 2784/5167 cut-off events. [2023-08-26 17:42:25,155 INFO L125 PetriNetUnfolderBase]: For 8480/8480 co-relation queries the response was YES. [2023-08-26 17:42:25,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16716 conditions, 5167 events. 2784/5167 cut-off events. For 8480/8480 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 28413 event pairs, 258 based on Foata normal form. 66/5183 useless extension candidates. Maximal degree in co-relation 16673. Up to 1008 conditions per place. [2023-08-26 17:42:25,200 INFO L140 encePairwiseOnDemand]: 335/349 looper letters, 315 selfloop transitions, 133 changer transitions 9/457 dead transitions. [2023-08-26 17:42:25,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 457 transitions, 3224 flow [2023-08-26 17:42:25,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-08-26 17:42:25,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2023-08-26 17:42:25,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 7163 transitions. [2023-08-26 17:42:25,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33646484099769836 [2023-08-26 17:42:25,210 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 7163 transitions. [2023-08-26 17:42:25,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 7163 transitions. [2023-08-26 17:42:25,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:25,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 7163 transitions. [2023-08-26 17:42:25,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 117.42622950819673) internal successors, (7163), 61 states have internal predecessors, (7163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:25,241 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 349.0) internal successors, (21638), 62 states have internal predecessors, (21638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:25,244 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 349.0) internal successors, (21638), 62 states have internal predecessors, (21638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:25,245 INFO L175 Difference]: Start difference. First operand has 129 places, 115 transitions, 981 flow. Second operand 61 states and 7163 transitions. [2023-08-26 17:42:25,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 457 transitions, 3224 flow [2023-08-26 17:42:25,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 457 transitions, 3120 flow, removed 21 selfloop flow, removed 2 redundant places. [2023-08-26 17:42:25,285 INFO L231 Difference]: Finished difference. Result has 194 places, 182 transitions, 1733 flow [2023-08-26 17:42:25,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=923, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=1733, PETRI_PLACES=194, PETRI_TRANSITIONS=182} [2023-08-26 17:42:25,285 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 148 predicate places. [2023-08-26 17:42:25,285 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 182 transitions, 1733 flow [2023-08-26 17:42:25,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 112.8) internal successors, (4512), 40 states have internal predecessors, (4512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:25,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:25,287 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:42:25,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-26 17:42:25,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:42:25,500 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t1Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:42:25,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:25,500 INFO L85 PathProgramCache]: Analyzing trace with hash -726554869, now seen corresponding path program 1 times [2023-08-26 17:42:25,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:25,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044800253] [2023-08-26 17:42:25,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:25,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:25,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:25,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:42:25,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:25,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044800253] [2023-08-26 17:42:25,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044800253] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:42:25,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786059728] [2023-08-26 17:42:25,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:25,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:42:25,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:42:25,586 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 17:42:25,607 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 17:42:25,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:25,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 17:42:25,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:42:25,745 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 17:42:25,746 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 17:42:25,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786059728] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:25,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 17:42:25,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2023-08-26 17:42:25,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854393185] [2023-08-26 17:42:25,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:25,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 17:42:25,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:25,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 17:42:25,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-26 17:42:25,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 349 [2023-08-26 17:42:25,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 182 transitions, 1733 flow. Second operand has 6 states, 6 states have (on average 144.83333333333334) internal successors, (869), 6 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:25,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:25,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 349 [2023-08-26 17:42:25,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:26,387 INFO L124 PetriNetUnfolderBase]: 2330/4353 cut-off events. [2023-08-26 17:42:26,387 INFO L125 PetriNetUnfolderBase]: For 8204/8204 co-relation queries the response was YES. [2023-08-26 17:42:26,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15304 conditions, 4353 events. 2330/4353 cut-off events. For 8204/8204 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 23251 event pairs, 834 based on Foata normal form. 44/4363 useless extension candidates. Maximal degree in co-relation 15254. Up to 2082 conditions per place. [2023-08-26 17:42:26,430 INFO L140 encePairwiseOnDemand]: 341/349 looper letters, 186 selfloop transitions, 37 changer transitions 0/223 dead transitions. [2023-08-26 17:42:26,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 223 transitions, 2330 flow [2023-08-26 17:42:26,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 17:42:26,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 17:42:26,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 935 transitions. [2023-08-26 17:42:26,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651384909264563 [2023-08-26 17:42:26,433 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 935 transitions. [2023-08-26 17:42:26,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 935 transitions. [2023-08-26 17:42:26,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:26,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 935 transitions. [2023-08-26 17:42:26,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 155.83333333333334) internal successors, (935), 6 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:26,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 349.0) internal successors, (2443), 7 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:26,436 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 349.0) internal successors, (2443), 7 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:26,436 INFO L175 Difference]: Start difference. First operand has 194 places, 182 transitions, 1733 flow. Second operand 6 states and 935 transitions. [2023-08-26 17:42:26,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 223 transitions, 2330 flow [2023-08-26 17:42:26,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 223 transitions, 1894 flow, removed 152 selfloop flow, removed 24 redundant places. [2023-08-26 17:42:26,498 INFO L231 Difference]: Finished difference. Result has 170 places, 167 transitions, 1332 flow [2023-08-26 17:42:26,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=1124, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1332, PETRI_PLACES=170, PETRI_TRANSITIONS=167} [2023-08-26 17:42:26,498 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 124 predicate places. [2023-08-26 17:42:26,498 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 167 transitions, 1332 flow [2023-08-26 17:42:26,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 144.83333333333334) internal successors, (869), 6 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:26,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:26,499 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:42:26,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-26 17:42:26,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-26 17:42:26,705 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:42:26,705 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:26,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1045689208, now seen corresponding path program 2 times [2023-08-26 17:42:26,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:26,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518681195] [2023-08-26 17:42:26,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:26,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:26,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:27,073 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:42:27,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:27,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518681195] [2023-08-26 17:42:27,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518681195] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:42:27,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344282976] [2023-08-26 17:42:27,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 17:42:27,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:42:27,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:42:27,075 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 17:42:27,077 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 17:42:27,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-26 17:42:27,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:42:27,184 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-26 17:42:27,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:42:27,529 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 17:42:27,529 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 17:42:27,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344282976] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:27,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 17:42:27,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13] total 24 [2023-08-26 17:42:27,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053246203] [2023-08-26 17:42:27,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:27,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 17:42:27,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:27,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 17:42:27,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2023-08-26 17:42:27,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 349 [2023-08-26 17:42:27,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 167 transitions, 1332 flow. Second operand has 13 states, 13 states have (on average 113.0) internal successors, (1469), 13 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:27,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:27,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 349 [2023-08-26 17:42:27,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:28,983 INFO L124 PetriNetUnfolderBase]: 2508/4683 cut-off events. [2023-08-26 17:42:28,983 INFO L125 PetriNetUnfolderBase]: For 5640/5640 co-relation queries the response was YES. [2023-08-26 17:42:28,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14960 conditions, 4683 events. 2508/4683 cut-off events. For 5640/5640 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 25665 event pairs, 242 based on Foata normal form. 18/4633 useless extension candidates. Maximal degree in co-relation 14916. Up to 1475 conditions per place. [2023-08-26 17:42:29,005 INFO L140 encePairwiseOnDemand]: 335/349 looper letters, 151 selfloop transitions, 137 changer transitions 3/291 dead transitions. [2023-08-26 17:42:29,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 291 transitions, 2355 flow [2023-08-26 17:42:29,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-26 17:42:29,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-26 17:42:29,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3053 transitions. [2023-08-26 17:42:29,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33645580780251266 [2023-08-26 17:42:29,010 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3053 transitions. [2023-08-26 17:42:29,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3053 transitions. [2023-08-26 17:42:29,010 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:29,011 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3053 transitions. [2023-08-26 17:42:29,014 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 117.42307692307692) internal successors, (3053), 26 states have internal predecessors, (3053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:29,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 349.0) internal successors, (9423), 27 states have internal predecessors, (9423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:29,021 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 349.0) internal successors, (9423), 27 states have internal predecessors, (9423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:29,022 INFO L175 Difference]: Start difference. First operand has 170 places, 167 transitions, 1332 flow. Second operand 26 states and 3053 transitions. [2023-08-26 17:42:29,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 291 transitions, 2355 flow [2023-08-26 17:42:29,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 291 transitions, 2345 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-08-26 17:42:29,059 INFO L231 Difference]: Finished difference. Result has 197 places, 187 transitions, 1829 flow [2023-08-26 17:42:29,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=1326, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1829, PETRI_PLACES=197, PETRI_TRANSITIONS=187} [2023-08-26 17:42:29,060 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 151 predicate places. [2023-08-26 17:42:29,060 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 187 transitions, 1829 flow [2023-08-26 17:42:29,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 113.0) internal successors, (1469), 13 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:29,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:29,061 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2023-08-26 17:42:29,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-26 17:42:29,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:42:29,267 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:42:29,267 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:29,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1761919503, now seen corresponding path program 2 times [2023-08-26 17:42:29,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:29,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639614743] [2023-08-26 17:42:29,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:29,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:29,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:30,075 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:42:30,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:30,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639614743] [2023-08-26 17:42:30,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639614743] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:42:30,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310509187] [2023-08-26 17:42:30,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 17:42:30,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:42:30,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:42:30,077 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 17:42:30,101 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 17:42:30,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 17:42:30,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:42:30,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-26 17:42:30,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:42:30,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 17:42:30,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 17:42:30,239 INFO L322 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-26 17:42:30,240 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 23 [2023-08-26 17:42:30,267 INFO L322 Elim1Store]: treesize reduction 21, result has 48.8 percent of original size [2023-08-26 17:42:30,268 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 45 [2023-08-26 17:42:30,701 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:42:30,701 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:42:31,080 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:42:31,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310509187] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:42:31,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:42:31,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 9] total 38 [2023-08-26 17:42:31,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284415791] [2023-08-26 17:42:31,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:42:31,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-26 17:42:31,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:31,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-26 17:42:31,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1420, Unknown=0, NotChecked=0, Total=1560 [2023-08-26 17:42:31,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 349 [2023-08-26 17:42:31,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 187 transitions, 1829 flow. Second operand has 40 states, 40 states have (on average 118.025) internal successors, (4721), 40 states have internal predecessors, (4721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:31,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:31,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 349 [2023-08-26 17:42:31,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:34,010 INFO L124 PetriNetUnfolderBase]: 3418/6365 cut-off events. [2023-08-26 17:42:34,010 INFO L125 PetriNetUnfolderBase]: For 10291/10291 co-relation queries the response was YES. [2023-08-26 17:42:34,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23218 conditions, 6365 events. 3418/6365 cut-off events. For 10291/10291 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 34661 event pairs, 1032 based on Foata normal form. 84/6349 useless extension candidates. Maximal degree in co-relation 23171. Up to 3742 conditions per place. [2023-08-26 17:42:34,054 INFO L140 encePairwiseOnDemand]: 340/349 looper letters, 388 selfloop transitions, 64 changer transitions 6/458 dead transitions. [2023-08-26 17:42:34,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 458 transitions, 4253 flow [2023-08-26 17:42:34,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-26 17:42:34,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-26 17:42:34,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3549 transitions. [2023-08-26 17:42:34,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3631805157593123 [2023-08-26 17:42:34,059 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3549 transitions. [2023-08-26 17:42:34,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3549 transitions. [2023-08-26 17:42:34,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:34,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3549 transitions. [2023-08-26 17:42:34,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 126.75) internal successors, (3549), 28 states have internal predecessors, (3549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:34,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 349.0) internal successors, (10121), 29 states have internal predecessors, (10121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:34,072 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 349.0) internal successors, (10121), 29 states have internal predecessors, (10121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:34,072 INFO L175 Difference]: Start difference. First operand has 197 places, 187 transitions, 1829 flow. Second operand 28 states and 3549 transitions. [2023-08-26 17:42:34,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 458 transitions, 4253 flow [2023-08-26 17:42:34,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 458 transitions, 4079 flow, removed 22 selfloop flow, removed 11 redundant places. [2023-08-26 17:42:34,159 INFO L231 Difference]: Finished difference. Result has 223 places, 231 transitions, 2483 flow [2023-08-26 17:42:34,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=1709, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2483, PETRI_PLACES=223, PETRI_TRANSITIONS=231} [2023-08-26 17:42:34,159 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 177 predicate places. [2023-08-26 17:42:34,159 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 231 transitions, 2483 flow [2023-08-26 17:42:34,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 118.025) internal successors, (4721), 40 states have internal predecessors, (4721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:34,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:34,160 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:42:34,169 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 17:42:34,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:42:34,367 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t2Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:42:34,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:34,367 INFO L85 PathProgramCache]: Analyzing trace with hash 467836902, now seen corresponding path program 3 times [2023-08-26 17:42:34,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:34,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784963393] [2023-08-26 17:42:34,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:34,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:34,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:34,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 17:42:34,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:34,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784963393] [2023-08-26 17:42:34,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784963393] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 17:42:34,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 17:42:34,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-26 17:42:34,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032720229] [2023-08-26 17:42:34,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 17:42:34,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-26 17:42:34,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:34,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-26 17:42:34,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2023-08-26 17:42:34,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 349 [2023-08-26 17:42:34,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 231 transitions, 2483 flow. Second operand has 15 states, 15 states have (on average 106.86666666666666) internal successors, (1603), 15 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:34,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:34,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 349 [2023-08-26 17:42:34,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:37,691 INFO L124 PetriNetUnfolderBase]: 5490/10186 cut-off events. [2023-08-26 17:42:37,692 INFO L125 PetriNetUnfolderBase]: For 23138/23138 co-relation queries the response was YES. [2023-08-26 17:42:37,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38052 conditions, 10186 events. 5490/10186 cut-off events. For 23138/23138 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 62669 event pairs, 948 based on Foata normal form. 0/10036 useless extension candidates. Maximal degree in co-relation 37999. Up to 2305 conditions per place. [2023-08-26 17:42:37,758 INFO L140 encePairwiseOnDemand]: 330/349 looper letters, 190 selfloop transitions, 330 changer transitions 4/524 dead transitions. [2023-08-26 17:42:37,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 524 transitions, 5851 flow [2023-08-26 17:42:37,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-26 17:42:37,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-26 17:42:37,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3663 transitions. [2023-08-26 17:42:37,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31805157593123207 [2023-08-26 17:42:37,770 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3663 transitions. [2023-08-26 17:42:37,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3663 transitions. [2023-08-26 17:42:37,772 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:37,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3663 transitions. [2023-08-26 17:42:37,783 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 111.0) internal successors, (3663), 33 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:37,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 349.0) internal successors, (11866), 34 states have internal predecessors, (11866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:37,795 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 349.0) internal successors, (11866), 34 states have internal predecessors, (11866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:37,795 INFO L175 Difference]: Start difference. First operand has 223 places, 231 transitions, 2483 flow. Second operand 33 states and 3663 transitions. [2023-08-26 17:42:37,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 524 transitions, 5851 flow [2023-08-26 17:42:37,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 524 transitions, 5673 flow, removed 61 selfloop flow, removed 10 redundant places. [2023-08-26 17:42:37,964 INFO L231 Difference]: Finished difference. Result has 252 places, 395 transitions, 5090 flow [2023-08-26 17:42:37,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=2386, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=5090, PETRI_PLACES=252, PETRI_TRANSITIONS=395} [2023-08-26 17:42:37,964 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 206 predicate places. [2023-08-26 17:42:37,965 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 395 transitions, 5090 flow [2023-08-26 17:42:37,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 106.86666666666666) internal successors, (1603), 15 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:37,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:37,965 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:42:37,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-26 17:42:37,965 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t2Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:42:37,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:37,967 INFO L85 PathProgramCache]: Analyzing trace with hash -2038868506, now seen corresponding path program 4 times [2023-08-26 17:42:37,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:37,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556197631] [2023-08-26 17:42:37,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:37,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:37,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:38,889 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:42:38,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:38,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556197631] [2023-08-26 17:42:38,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556197631] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:42:38,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830303720] [2023-08-26 17:42:38,890 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 17:42:38,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:42:38,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:42:38,893 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 17:42:38,916 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 17:42:39,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 17:42:39,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:42:39,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 64 conjunts are in the unsatisfiable core [2023-08-26 17:42:39,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:42:39,044 INFO L322 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-26 17:42:39,044 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-08-26 17:42:39,356 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-26 17:42:39,497 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-08-26 17:42:39,729 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 32 [2023-08-26 17:42:39,798 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:42:39,798 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:42:40,158 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_642 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_642) |c_~#arr~0.base|) (+ (* |c_t1Thread1of1ForFork1_inc_top_#t~post31#1| 4) |c_~#arr~0.offset|)) 4294967296)))) is different from false [2023-08-26 17:42:40,172 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_642 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_642) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4))) 4294967296)))) is different from false [2023-08-26 17:42:40,180 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 17:42:40,180 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-26 17:42:40,194 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 17:42:40,195 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2023-08-26 17:42:40,201 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2023-08-26 17:42:40,416 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-08-26 17:42:40,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830303720] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:42:40,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:42:40,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 14] total 46 [2023-08-26 17:42:40,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452864073] [2023-08-26 17:42:40,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:42:40,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-08-26 17:42:40,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:40,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-08-26 17:42:40,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1892, Unknown=3, NotChecked=178, Total=2256 [2023-08-26 17:42:40,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 349 [2023-08-26 17:42:40,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 395 transitions, 5090 flow. Second operand has 48 states, 48 states have (on average 91.75) internal successors, (4404), 48 states have internal predecessors, (4404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:40,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:40,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 349 [2023-08-26 17:42:40,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:52,947 INFO L124 PetriNetUnfolderBase]: 7034/13062 cut-off events. [2023-08-26 17:42:52,948 INFO L125 PetriNetUnfolderBase]: For 34824/34824 co-relation queries the response was YES. [2023-08-26 17:42:53,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53782 conditions, 13062 events. 7034/13062 cut-off events. For 34824/34824 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 83769 event pairs, 1166 based on Foata normal form. 40/12934 useless extension candidates. Maximal degree in co-relation 53721. Up to 2978 conditions per place. [2023-08-26 17:42:53,036 INFO L140 encePairwiseOnDemand]: 328/349 looper letters, 327 selfloop transitions, 485 changer transitions 15/827 dead transitions. [2023-08-26 17:42:53,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 827 transitions, 9401 flow [2023-08-26 17:42:53,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-08-26 17:42:53,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2023-08-26 17:42:53,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 6808 transitions. [2023-08-26 17:42:53,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2747487792082005 [2023-08-26 17:42:53,046 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 6808 transitions. [2023-08-26 17:42:53,047 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 6808 transitions. [2023-08-26 17:42:53,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:53,048 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 6808 transitions. [2023-08-26 17:42:53,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 95.88732394366197) internal successors, (6808), 71 states have internal predecessors, (6808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:53,073 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 349.0) internal successors, (25128), 72 states have internal predecessors, (25128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:53,076 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 349.0) internal successors, (25128), 72 states have internal predecessors, (25128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:53,077 INFO L175 Difference]: Start difference. First operand has 252 places, 395 transitions, 5090 flow. Second operand 71 states and 6808 transitions. [2023-08-26 17:42:53,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 827 transitions, 9401 flow [2023-08-26 17:42:53,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 827 transitions, 9184 flow, removed 84 selfloop flow, removed 7 redundant places. [2023-08-26 17:42:53,349 INFO L231 Difference]: Finished difference. Result has 322 places, 541 transitions, 7745 flow [2023-08-26 17:42:53,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=4986, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=345, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=7745, PETRI_PLACES=322, PETRI_TRANSITIONS=541} [2023-08-26 17:42:53,349 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 276 predicate places. [2023-08-26 17:42:53,349 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 541 transitions, 7745 flow [2023-08-26 17:42:53,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 91.75) internal successors, (4404), 48 states have internal predecessors, (4404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:53,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:42:53,350 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:42:53,355 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 17:42:53,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:42:53,551 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:42:53,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:42:53,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1933740609, now seen corresponding path program 2 times [2023-08-26 17:42:53,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:42:53,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550257024] [2023-08-26 17:42:53,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:42:53,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:42:53,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:42:54,084 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:42:54,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:42:54,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550257024] [2023-08-26 17:42:54,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [550257024] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:42:54,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472673533] [2023-08-26 17:42:54,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 17:42:54,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:42:54,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:42:54,086 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 17:42:54,088 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 17:42:54,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 17:42:54,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:42:54,228 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-26 17:42:54,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:42:54,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 17:42:54,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 17:42:54,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 17:42:54,242 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2023-08-26 17:42:54,617 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:42:54,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:42:55,040 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:42:55,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472673533] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:42:55,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:42:55,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 9] total 35 [2023-08-26 17:42:55,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460476646] [2023-08-26 17:42:55,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:42:55,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-26 17:42:55,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:42:55,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-26 17:42:55,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2023-08-26 17:42:55,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 349 [2023-08-26 17:42:55,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 541 transitions, 7745 flow. Second operand has 37 states, 37 states have (on average 110.51351351351352) internal successors, (4089), 37 states have internal predecessors, (4089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:55,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:42:55,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 349 [2023-08-26 17:42:55,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:42:59,539 INFO L124 PetriNetUnfolderBase]: 8198/15244 cut-off events. [2023-08-26 17:42:59,539 INFO L125 PetriNetUnfolderBase]: For 50971/50971 co-relation queries the response was YES. [2023-08-26 17:42:59,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71256 conditions, 15244 events. 8198/15244 cut-off events. For 50971/50971 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 101644 event pairs, 2553 based on Foata normal form. 42/15048 useless extension candidates. Maximal degree in co-relation 71188. Up to 8849 conditions per place. [2023-08-26 17:42:59,640 INFO L140 encePairwiseOnDemand]: 337/349 looper letters, 672 selfloop transitions, 171 changer transitions 27/870 dead transitions. [2023-08-26 17:42:59,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 870 transitions, 12423 flow [2023-08-26 17:42:59,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-26 17:42:59,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-26 17:42:59,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3613 transitions. [2023-08-26 17:42:59,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33394953322857934 [2023-08-26 17:42:59,648 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3613 transitions. [2023-08-26 17:42:59,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3613 transitions. [2023-08-26 17:42:59,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:42:59,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3613 transitions. [2023-08-26 17:42:59,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 116.54838709677419) internal successors, (3613), 31 states have internal predecessors, (3613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:59,659 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 349.0) internal successors, (11168), 32 states have internal predecessors, (11168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:59,660 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 349.0) internal successors, (11168), 32 states have internal predecessors, (11168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:42:59,660 INFO L175 Difference]: Start difference. First operand has 322 places, 541 transitions, 7745 flow. Second operand 31 states and 3613 transitions. [2023-08-26 17:42:59,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 870 transitions, 12423 flow [2023-08-26 17:43:00,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 870 transitions, 11235 flow, removed 197 selfloop flow, removed 29 redundant places. [2023-08-26 17:43:00,018 INFO L231 Difference]: Finished difference. Result has 334 places, 606 transitions, 8356 flow [2023-08-26 17:43:00,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=6751, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=8356, PETRI_PLACES=334, PETRI_TRANSITIONS=606} [2023-08-26 17:43:00,019 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 288 predicate places. [2023-08-26 17:43:00,019 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 606 transitions, 8356 flow [2023-08-26 17:43:00,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 110.51351351351352) internal successors, (4089), 37 states have internal predecessors, (4089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:00,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:43:00,020 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:43:00,026 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 17:43:00,220 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,SelfDestructingSolverStorable22 [2023-08-26 17:43:00,221 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:43:00,221 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:43:00,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1772673812, now seen corresponding path program 1 times [2023-08-26 17:43:00,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:43:00,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772526423] [2023-08-26 17:43:00,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:43:00,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:43:00,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:43:00,575 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 17:43:00,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:43:00,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772526423] [2023-08-26 17:43:00,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772526423] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:43:00,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939944079] [2023-08-26 17:43:00,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:43:00,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:43:00,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:43:00,577 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 17:43:00,600 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 17:43:00,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:43:00,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-26 17:43:00,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:43:01,138 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:43:01,139 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:43:01,622 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 17:43:01,622 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 39 [2023-08-26 17:43:01,766 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:43:01,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939944079] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:43:01,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:43:01,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 15] total 41 [2023-08-26 17:43:01,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072440393] [2023-08-26 17:43:01,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:43:01,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-26 17:43:01,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:43:01,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-26 17:43:01,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1635, Unknown=0, NotChecked=0, Total=1806 [2023-08-26 17:43:01,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 349 [2023-08-26 17:43:01,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 606 transitions, 8356 flow. Second operand has 43 states, 43 states have (on average 113.37209302325581) internal successors, (4875), 43 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:01,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:43:01,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 349 [2023-08-26 17:43:01,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:43:07,339 INFO L124 PetriNetUnfolderBase]: 8216/15280 cut-off events. [2023-08-26 17:43:07,340 INFO L125 PetriNetUnfolderBase]: For 46919/46919 co-relation queries the response was YES. [2023-08-26 17:43:07,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69629 conditions, 15280 events. 8216/15280 cut-off events. For 46919/46919 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 101879 event pairs, 1020 based on Foata normal form. 6/15052 useless extension candidates. Maximal degree in co-relation 69556. Up to 6129 conditions per place. [2023-08-26 17:43:07,508 INFO L140 encePairwiseOnDemand]: 335/349 looper letters, 201 selfloop transitions, 530 changer transitions 3/734 dead transitions. [2023-08-26 17:43:07,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 734 transitions, 10287 flow [2023-08-26 17:43:07,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-26 17:43:07,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-26 17:43:07,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3981 transitions. [2023-08-26 17:43:07,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33549637620091016 [2023-08-26 17:43:07,513 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3981 transitions. [2023-08-26 17:43:07,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3981 transitions. [2023-08-26 17:43:07,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:43:07,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3981 transitions. [2023-08-26 17:43:07,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 117.08823529411765) internal successors, (3981), 34 states have internal predecessors, (3981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:07,526 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 349.0) internal successors, (12215), 35 states have internal predecessors, (12215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:07,527 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 349.0) internal successors, (12215), 35 states have internal predecessors, (12215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:07,527 INFO L175 Difference]: Start difference. First operand has 334 places, 606 transitions, 8356 flow. Second operand 34 states and 3981 transitions. [2023-08-26 17:43:07,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 734 transitions, 10287 flow [2023-08-26 17:43:07,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 734 transitions, 10175 flow, removed 31 selfloop flow, removed 10 redundant places. [2023-08-26 17:43:07,896 INFO L231 Difference]: Finished difference. Result has 356 places, 610 transitions, 9336 flow [2023-08-26 17:43:07,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=8248, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=525, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=9336, PETRI_PLACES=356, PETRI_TRANSITIONS=610} [2023-08-26 17:43:07,897 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 310 predicate places. [2023-08-26 17:43:07,897 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 610 transitions, 9336 flow [2023-08-26 17:43:07,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 113.37209302325581) internal successors, (4875), 43 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:07,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:43:07,898 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:43:07,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-26 17:43:08,098 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,SelfDestructingSolverStorable23 [2023-08-26 17:43:08,099 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting t2Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:43:08,099 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:43:08,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1562433482, now seen corresponding path program 1 times [2023-08-26 17:43:08,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:43:08,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782256859] [2023-08-26 17:43:08,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:43:08,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:43:08,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:43:09,203 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:43:09,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:43:09,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782256859] [2023-08-26 17:43:09,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782256859] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:43:09,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748103649] [2023-08-26 17:43:09,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:43:09,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:43:09,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:43:09,205 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 17:43:09,207 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 17:43:09,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:43:09,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 76 conjunts are in the unsatisfiable core [2023-08-26 17:43:09,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:43:09,545 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-26 17:43:09,765 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-08-26 17:43:10,205 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-26 17:43:10,206 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 32 [2023-08-26 17:43:10,267 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:43:10,267 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:43:15,320 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 48 [2023-08-26 17:43:15,643 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:43:15,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748103649] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:43:15,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:43:15,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 20] total 60 [2023-08-26 17:43:15,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297454173] [2023-08-26 17:43:15,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:43:15,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-08-26 17:43:15,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:43:15,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-08-26 17:43:15,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=3429, Unknown=2, NotChecked=0, Total=3782 [2023-08-26 17:43:15,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 349 [2023-08-26 17:43:15,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 610 transitions, 9336 flow. Second operand has 62 states, 62 states have (on average 106.74193548387096) internal successors, (6618), 62 states have internal predecessors, (6618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:43:15,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:43:15,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 349 [2023-08-26 17:43:15,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:43:41,806 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 17:43:51,710 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 17:44:02,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 17:44:04,828 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 17:44:39,706 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 17:44:41,223 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 17:44:41,860 INFO L124 PetriNetUnfolderBase]: 12980/24255 cut-off events. [2023-08-26 17:44:41,861 INFO L125 PetriNetUnfolderBase]: For 80049/80049 co-relation queries the response was YES. [2023-08-26 17:44:42,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115636 conditions, 24255 events. 12980/24255 cut-off events. For 80049/80049 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 174168 event pairs, 2862 based on Foata normal form. 102/24035 useless extension candidates. Maximal degree in co-relation 115563. Up to 8905 conditions per place. [2023-08-26 17:44:42,148 INFO L140 encePairwiseOnDemand]: 329/349 looper letters, 932 selfloop transitions, 664 changer transitions 223/1819 dead transitions. [2023-08-26 17:44:42,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 1819 transitions, 24017 flow [2023-08-26 17:44:42,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2023-08-26 17:44:42,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2023-08-26 17:44:42,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 17577 transitions. [2023-08-26 17:44:42,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3167540682272801 [2023-08-26 17:44:42,164 INFO L72 ComplementDD]: Start complementDD. Operand 159 states and 17577 transitions. [2023-08-26 17:44:42,164 INFO L73 IsDeterministic]: Start isDeterministic. Operand 159 states and 17577 transitions. [2023-08-26 17:44:42,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:44:42,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 159 states and 17577 transitions. [2023-08-26 17:44:42,187 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 160 states, 159 states have (on average 110.54716981132076) internal successors, (17577), 159 states have internal predecessors, (17577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:44:42,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 160 states, 160 states have (on average 349.0) internal successors, (55840), 160 states have internal predecessors, (55840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:44:42,234 INFO L81 ComplementDD]: Finished complementDD. Result has 160 states, 160 states have (on average 349.0) internal successors, (55840), 160 states have internal predecessors, (55840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:44:42,234 INFO L175 Difference]: Start difference. First operand has 356 places, 610 transitions, 9336 flow. Second operand 159 states and 17577 transitions. [2023-08-26 17:44:42,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 1819 transitions, 24017 flow [2023-08-26 17:44:42,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 1819 transitions, 21325 flow, removed 31 selfloop flow, removed 26 redundant places. [2023-08-26 17:44:42,808 INFO L231 Difference]: Finished difference. Result has 536 places, 1143 transitions, 17092 flow [2023-08-26 17:44:42,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=7967, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=159, PETRI_FLOW=17092, PETRI_PLACES=536, PETRI_TRANSITIONS=1143} [2023-08-26 17:44:42,809 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 490 predicate places. [2023-08-26 17:44:42,809 INFO L495 AbstractCegarLoop]: Abstraction has has 536 places, 1143 transitions, 17092 flow [2023-08-26 17:44:42,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 106.74193548387096) internal successors, (6618), 62 states have internal predecessors, (6618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:44:42,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:44:42,810 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:44:42,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-26 17:44:43,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-26 17:44:43,011 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting t2Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:44:43,011 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:44:43,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1429512368, now seen corresponding path program 2 times [2023-08-26 17:44:43,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:44:43,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548176386] [2023-08-26 17:44:43,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:44:43,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:44:43,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:44:44,162 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:44:44,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:44:44,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548176386] [2023-08-26 17:44:44,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548176386] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:44:44,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842535630] [2023-08-26 17:44:44,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 17:44:44,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:44:44,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:44:44,163 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 17:44:44,165 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 17:44:44,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 17:44:44,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:44:44,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 82 conjunts are in the unsatisfiable core [2023-08-26 17:44:44,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:44:44,316 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-26 17:44:44,317 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-08-26 17:44:44,508 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-26 17:44:44,554 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2023-08-26 17:44:44,971 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2023-08-26 17:44:54,071 INFO L322 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-08-26 17:44:54,071 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 35 [2023-08-26 17:44:54,151 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:44:54,152 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:44:55,743 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 17:44:55,743 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2023-08-26 17:44:55,754 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 17:44:55,754 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 54 [2023-08-26 17:44:55,759 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 22 [2023-08-26 17:44:56,182 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:44:56,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842535630] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:44:56,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:44:56,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 21] total 64 [2023-08-26 17:44:56,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225523044] [2023-08-26 17:44:56,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:44:56,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-08-26 17:44:56,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:44:56,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-08-26 17:44:56,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=3946, Unknown=11, NotChecked=0, Total=4290 [2023-08-26 17:44:56,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 349 [2023-08-26 17:44:56,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 536 places, 1143 transitions, 17092 flow. Second operand has 66 states, 66 states have (on average 91.63636363636364) internal successors, (6048), 66 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:44:56,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:44:56,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 349 [2023-08-26 17:44:56,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:45:24,502 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 17:45:31,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 17:45:40,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 17:45:43,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 17:45:46,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 17:45:49,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 17:45:53,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 17:46:00,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 17:46:07,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 17:46:09,565 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 17:46:12,016 INFO L124 PetriNetUnfolderBase]: 15330/28650 cut-off events. [2023-08-26 17:46:12,016 INFO L125 PetriNetUnfolderBase]: For 107288/107288 co-relation queries the response was YES. [2023-08-26 17:46:12,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136865 conditions, 28650 events. 15330/28650 cut-off events. For 107288/107288 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 211474 event pairs, 4260 based on Foata normal form. 28/28276 useless extension candidates. Maximal degree in co-relation 136746. Up to 14356 conditions per place. [2023-08-26 17:46:12,607 INFO L140 encePairwiseOnDemand]: 328/349 looper letters, 1069 selfloop transitions, 635 changer transitions 151/1855 dead transitions. [2023-08-26 17:46:12,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 618 places, 1855 transitions, 26886 flow [2023-08-26 17:46:12,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-08-26 17:46:12,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2023-08-26 17:46:12,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 8000 transitions. [2023-08-26 17:46:12,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2761763385921911 [2023-08-26 17:46:12,615 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 8000 transitions. [2023-08-26 17:46:12,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 8000 transitions. [2023-08-26 17:46:12,617 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:46:12,617 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 8000 transitions. [2023-08-26 17:46:12,624 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 96.3855421686747) internal successors, (8000), 83 states have internal predecessors, (8000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:46:12,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 349.0) internal successors, (29316), 84 states have internal predecessors, (29316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:46:12,647 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 349.0) internal successors, (29316), 84 states have internal predecessors, (29316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:46:12,648 INFO L175 Difference]: Start difference. First operand has 536 places, 1143 transitions, 17092 flow. Second operand 83 states and 8000 transitions. [2023-08-26 17:46:12,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 618 places, 1855 transitions, 26886 flow [2023-08-26 17:46:14,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 598 places, 1855 transitions, 26209 flow, removed 288 selfloop flow, removed 20 redundant places. [2023-08-26 17:46:14,086 INFO L231 Difference]: Finished difference. Result has 651 places, 1431 transitions, 22834 flow [2023-08-26 17:46:14,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=16599, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=385, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=22834, PETRI_PLACES=651, PETRI_TRANSITIONS=1431} [2023-08-26 17:46:14,088 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 605 predicate places. [2023-08-26 17:46:14,088 INFO L495 AbstractCegarLoop]: Abstraction has has 651 places, 1431 transitions, 22834 flow [2023-08-26 17:46:14,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 91.63636363636364) internal successors, (6048), 66 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:46:14,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:46:14,089 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:46:14,094 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 17:46:14,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-26 17:46:14,289 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting t2Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:46:14,290 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:46:14,290 INFO L85 PathProgramCache]: Analyzing trace with hash -19589870, now seen corresponding path program 3 times [2023-08-26 17:46:14,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:46:14,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877552538] [2023-08-26 17:46:14,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:46:14,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:46:14,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:46:16,104 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:46:16,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:46:16,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877552538] [2023-08-26 17:46:16,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877552538] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:46:16,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613262468] [2023-08-26 17:46:16,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 17:46:16,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:46:16,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:46:16,106 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 17:46:16,107 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 17:46:16,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 17:46:16,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:46:16,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 92 conjunts are in the unsatisfiable core [2023-08-26 17:46:16,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:46:16,268 INFO L322 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-26 17:46:16,269 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-08-26 17:46:16,497 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-26 17:46:16,778 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-08-26 17:46:16,924 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-08-26 17:46:17,557 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-26 17:46:17,558 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 32 [2023-08-26 17:46:17,621 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:46:17,621 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:46:18,529 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_983 Int) (v_ArrVal_981 (Array Int Int)) (v_~top~0_96 Int)) (or (not (= 4294967294 (mod (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_981))) (store .cse0 |c_t1Thread1of1ForFork1_push_~stack#1.base| (store (select .cse0 |c_t1Thread1of1ForFork1_push_~stack#1.base|) (+ |c_t1Thread1of1ForFork1_push_~stack#1.offset| (* c_~top~0 4)) v_ArrVal_983))) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (- 4) (* v_~top~0_96 4))) 4294967296))) (< c_~top~0 v_~top~0_96) (<= v_~top~0_96 0))) is different from false [2023-08-26 17:46:18,710 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_983 Int) (v_ArrVal_981 (Array Int Int)) (v_~top~0_96 Int)) (or (not (= 4294967294 (mod (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_981) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4)) v_ArrVal_983) (+ |c_~#arr~0.offset| (- 4) (* v_~top~0_96 4))) 4294967296))) (< c_~top~0 v_~top~0_96) (<= v_~top~0_96 0))) is different from false [2023-08-26 17:46:18,779 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_983 Int) (v_ArrVal_981 (Array Int Int)) (v_~top~0_96 Int)) (or (not (= 4294967294 (mod (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_981) |c_~#arr~0.base|) (+ (* |c_t1Thread1of1ForFork1_inc_top_#t~post31#1| 4) |c_~#arr~0.offset| 4) v_ArrVal_983) (+ |c_~#arr~0.offset| (- 4) (* v_~top~0_96 4))) 4294967296))) (<= v_~top~0_96 0) (< (+ |c_t1Thread1of1ForFork1_inc_top_#t~post31#1| 1) v_~top~0_96))) is different from false [2023-08-26 17:46:18,795 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_983 Int) (v_ArrVal_981 (Array Int Int)) (v_~top~0_96 Int)) (or (< (+ c_~top~0 1) v_~top~0_96) (not (= (mod (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_981) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4) 4) v_ArrVal_983) (+ |c_~#arr~0.offset| (- 4) (* v_~top~0_96 4))) 4294967296) 4294967294)) (<= v_~top~0_96 0))) is different from false [2023-08-26 17:46:18,808 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 17:46:18,809 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 39 [2023-08-26 17:46:18,820 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 17:46:18,822 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 71 [2023-08-26 17:46:18,828 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 57 [2023-08-26 17:46:18,840 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2023-08-26 17:46:18,858 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 17:46:18,859 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 68 [2023-08-26 17:46:19,451 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2023-08-26 17:46:19,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613262468] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:46:19,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:46:19,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 22] total 69 [2023-08-26 17:46:19,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840906510] [2023-08-26 17:46:19,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:46:19,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-08-26 17:46:19,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:46:19,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-08-26 17:46:19,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=4043, Unknown=10, NotChecked=532, Total=4970 [2023-08-26 17:46:19,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 349 [2023-08-26 17:46:19,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 651 places, 1431 transitions, 22834 flow. Second operand has 71 states, 71 states have (on average 91.52112676056338) internal successors, (6498), 71 states have internal predecessors, (6498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:46:19,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:46:19,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 349 [2023-08-26 17:46:19,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:46:29,895 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_~top~0 4)) (.cse0 (select |c_#memory_int| |c_t1Thread1of1ForFork1_push_~stack#1.base|))) (and (forall ((v_ArrVal_983 Int) (v_~top~0_96 Int)) (or (< c_~top~0 v_~top~0_96) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_t1Thread1of1ForFork1_push_~stack#1.base| (store .cse0 (+ |c_t1Thread1of1ForFork1_push_~stack#1.offset| .cse1) v_ArrVal_983)) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (- 4) (* v_~top~0_96 4))) 4294967296))) (<= v_~top~0_96 0))) (forall ((v_ArrVal_983 Int) (v_ArrVal_981 (Array Int Int)) (v_~top~0_96 Int)) (or (not (= 4294967294 (mod (select (select (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_981))) (store .cse2 |c_t1Thread1of1ForFork1_push_#in~stack#1.base| (store (select .cse2 |c_t1Thread1of1ForFork1_push_#in~stack#1.base|) (+ |c_t1Thread1of1ForFork1_push_#in~stack#1.offset| .cse1) v_ArrVal_983))) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (- 4) (* v_~top~0_96 4))) 4294967296))) (< c_~top~0 v_~top~0_96) (<= v_~top~0_96 0))) (forall ((v_ArrVal_983 Int) (v_~top~0_96 Int)) (or (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_t1Thread1of1ForFork1_push_~stack#1.base| (store .cse0 (+ |c_t1Thread1of1ForFork1_push_~stack#1.offset| (* |c_t1Thread1of1ForFork1_get_top_#res#1| 4)) v_ArrVal_983)) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (- 4) (* v_~top~0_96 4))) 4294967296))) (< c_~top~0 v_~top~0_96) (<= v_~top~0_96 0))))) is different from false [2023-08-26 17:46:48,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 17:46:50,591 INFO L124 PetriNetUnfolderBase]: 18739/35102 cut-off events. [2023-08-26 17:46:50,591 INFO L125 PetriNetUnfolderBase]: For 154267/154267 co-relation queries the response was YES. [2023-08-26 17:46:51,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173153 conditions, 35102 events. 18739/35102 cut-off events. For 154267/154267 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 267713 event pairs, 7219 based on Foata normal form. 54/34618 useless extension candidates. Maximal degree in co-relation 172985. Up to 22773 conditions per place. [2023-08-26 17:46:51,798 INFO L140 encePairwiseOnDemand]: 322/349 looper letters, 1523 selfloop transitions, 556 changer transitions 143/2222 dead transitions. [2023-08-26 17:46:51,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 727 places, 2222 transitions, 35504 flow [2023-08-26 17:46:51,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-08-26 17:46:51,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2023-08-26 17:46:51,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 7456 transitions. [2023-08-26 17:46:51,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.277453205819968 [2023-08-26 17:46:51,805 INFO L72 ComplementDD]: Start complementDD. Operand 77 states and 7456 transitions. [2023-08-26 17:46:51,806 INFO L73 IsDeterministic]: Start isDeterministic. Operand 77 states and 7456 transitions. [2023-08-26 17:46:51,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:46:51,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 77 states and 7456 transitions. [2023-08-26 17:46:51,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 78 states, 77 states have (on average 96.83116883116882) internal successors, (7456), 77 states have internal predecessors, (7456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:46:51,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 78 states, 78 states have (on average 349.0) internal successors, (27222), 78 states have internal predecessors, (27222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:46:51,840 INFO L81 ComplementDD]: Finished complementDD. Result has 78 states, 78 states have (on average 349.0) internal successors, (27222), 78 states have internal predecessors, (27222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:46:51,840 INFO L175 Difference]: Start difference. First operand has 651 places, 1431 transitions, 22834 flow. Second operand 77 states and 7456 transitions. [2023-08-26 17:46:51,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 727 places, 2222 transitions, 35504 flow [2023-08-26 17:46:54,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 725 places, 2222 transitions, 35304 flow, removed 89 selfloop flow, removed 2 redundant places. [2023-08-26 17:46:54,414 INFO L231 Difference]: Finished difference. Result has 768 places, 1689 transitions, 28509 flow [2023-08-26 17:46:54,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=22608, PETRI_DIFFERENCE_MINUEND_PLACES=649, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=334, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=953, PETRI_DIFFERENCE_SUBTRAHEND_STATES=77, PETRI_FLOW=28509, PETRI_PLACES=768, PETRI_TRANSITIONS=1689} [2023-08-26 17:46:54,416 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 722 predicate places. [2023-08-26 17:46:54,416 INFO L495 AbstractCegarLoop]: Abstraction has has 768 places, 1689 transitions, 28509 flow [2023-08-26 17:46:54,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 91.52112676056338) internal successors, (6498), 71 states have internal predecessors, (6498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:46:54,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:46:54,417 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:46:54,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-26 17:46:54,624 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,SelfDestructingSolverStorable26 [2023-08-26 17:46:54,625 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting t2Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:46:54,625 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:46:54,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1233541596, now seen corresponding path program 4 times [2023-08-26 17:46:54,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:46:54,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579922307] [2023-08-26 17:46:54,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:46:54,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:46:54,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:46:55,796 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:46:55,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:46:55,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579922307] [2023-08-26 17:46:55,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579922307] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:46:55,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618324243] [2023-08-26 17:46:55,797 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 17:46:55,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:46:55,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:46:55,798 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 17:46:55,800 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 17:46:55,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 17:46:55,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:46:55,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 80 conjunts are in the unsatisfiable core [2023-08-26 17:46:55,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:46:55,946 INFO L322 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-26 17:46:55,947 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-08-26 17:46:56,144 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-26 17:46:56,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 17:46:56,458 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2023-08-26 17:46:56,619 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-08-26 17:46:57,071 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 32 [2023-08-26 17:46:57,137 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:46:57,137 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:47:01,023 INFO L322 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2023-08-26 17:47:01,024 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 60 [2023-08-26 17:47:01,036 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 17:47:01,037 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 70 [2023-08-26 17:47:01,042 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2023-08-26 17:47:03,368 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 17:47:03,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618324243] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:47:03,369 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:47:03,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22, 22] total 69 [2023-08-26 17:47:03,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250986470] [2023-08-26 17:47:03,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:47:03,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-08-26 17:47:03,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:47:03,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-08-26 17:47:03,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=4591, Unknown=37, NotChecked=0, Total=4970 [2023-08-26 17:47:03,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 349 [2023-08-26 17:47:03,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 768 places, 1689 transitions, 28509 flow. Second operand has 71 states, 71 states have (on average 91.52112676056338) internal successors, (6498), 71 states have internal predecessors, (6498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:47:03,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:47:03,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 349 [2023-08-26 17:47:03,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 17:47:34,285 WARN L234 SmtUtils]: Spent 6.24s on a formula simplification. DAG size of input: 84 DAG size of output: 79 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 17:48:04,334 WARN L234 SmtUtils]: Spent 5.23s on a formula simplification. DAG size of input: 115 DAG size of output: 107 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 17:48:27,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 17:48:33,871 WARN L234 SmtUtils]: Spent 6.18s on a formula simplification. DAG size of input: 83 DAG size of output: 77 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 17:48:36,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 17:48:37,702 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 17:48:42,886 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 17:48:49,569 WARN L234 SmtUtils]: Spent 6.24s on a formula simplification. DAG size of input: 91 DAG size of output: 85 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 17:48:56,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 17:49:03,276 WARN L234 SmtUtils]: Spent 6.26s on a formula simplification. DAG size of input: 105 DAG size of output: 100 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 17:49:10,903 WARN L234 SmtUtils]: Spent 6.16s on a formula simplification. DAG size of input: 51 DAG size of output: 46 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 17:49:57,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 17:50:00,080 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 17:50:22,542 WARN L234 SmtUtils]: Spent 6.34s on a formula simplification. DAG size of input: 99 DAG size of output: 93 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 17:50:43,999 WARN L234 SmtUtils]: Spent 6.56s on a formula simplification. DAG size of input: 108 DAG size of output: 102 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 17:50:49,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 17:51:06,609 WARN L234 SmtUtils]: Spent 7.09s on a formula simplification. DAG size of input: 106 DAG size of output: 100 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 17:51:35,974 WARN L234 SmtUtils]: Spent 6.61s on a formula simplification. DAG size of input: 120 DAG size of output: 115 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 17:51:38,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 17:51:41,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 17:52:57,486 WARN L234 SmtUtils]: Spent 8.73s on a formula simplification. DAG size of input: 89 DAG size of output: 88 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 17:53:16,164 WARN L234 SmtUtils]: Spent 6.42s on a formula simplification. DAG size of input: 66 DAG size of output: 62 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 17:53:39,545 WARN L234 SmtUtils]: Spent 6.53s on a formula simplification. DAG size of input: 74 DAG size of output: 70 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 17:54:01,825 WARN L234 SmtUtils]: Spent 5.26s on a formula simplification. DAG size of input: 81 DAG size of output: 77 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 17:55:01,489 INFO L124 PetriNetUnfolderBase]: 25921/49021 cut-off events. [2023-08-26 17:55:01,490 INFO L125 PetriNetUnfolderBase]: For 357697/357697 co-relation queries the response was YES. [2023-08-26 17:55:03,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 294952 conditions, 49021 events. 25921/49021 cut-off events. For 357697/357697 co-relation queries the response was YES. Maximal size of possible extension queue 827. Compared 407817 event pairs, 3029 based on Foata normal form. 570/48930 useless extension candidates. Maximal degree in co-relation 294742. Up to 22382 conditions per place. [2023-08-26 17:55:03,852 INFO L140 encePairwiseOnDemand]: 323/349 looper letters, 1437 selfloop transitions, 2088 changer transitions 147/3672 dead transitions. [2023-08-26 17:55:03,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 933 places, 3672 transitions, 57971 flow [2023-08-26 17:55:03,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2023-08-26 17:55:03,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2023-08-26 17:55:03,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 21392 transitions. [2023-08-26 17:55:03,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27486604905752504 [2023-08-26 17:55:03,866 INFO L72 ComplementDD]: Start complementDD. Operand 223 states and 21392 transitions. [2023-08-26 17:55:03,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 223 states and 21392 transitions. [2023-08-26 17:55:04,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 17:55:04,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 223 states and 21392 transitions. [2023-08-26 17:55:04,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 224 states, 223 states have (on average 95.92825112107623) internal successors, (21392), 223 states have internal predecessors, (21392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:55:04,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 224 states, 224 states have (on average 349.0) internal successors, (78176), 224 states have internal predecessors, (78176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:55:04,130 INFO L81 ComplementDD]: Finished complementDD. Result has 224 states, 224 states have (on average 349.0) internal successors, (78176), 224 states have internal predecessors, (78176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:55:04,130 INFO L175 Difference]: Start difference. First operand has 768 places, 1689 transitions, 28509 flow. Second operand 223 states and 21392 transitions. [2023-08-26 17:55:04,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 933 places, 3672 transitions, 57971 flow [2023-08-26 17:55:09,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 878 places, 3672 transitions, 56322 flow, removed 571 selfloop flow, removed 55 redundant places. [2023-08-26 17:55:09,894 INFO L231 Difference]: Finished difference. Result has 957 places, 2642 transitions, 48627 flow [2023-08-26 17:55:09,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=20795, PETRI_DIFFERENCE_MINUEND_PLACES=656, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1053, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=223, PETRI_FLOW=48627, PETRI_PLACES=957, PETRI_TRANSITIONS=2642} [2023-08-26 17:55:09,896 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 911 predicate places. [2023-08-26 17:55:09,896 INFO L495 AbstractCegarLoop]: Abstraction has has 957 places, 2642 transitions, 48627 flow [2023-08-26 17:55:09,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 91.52112676056338) internal successors, (6498), 71 states have internal predecessors, (6498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:55:09,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 17:55:09,897 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:55:09,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-26 17:55:10,102 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,SelfDestructingSolverStorable27 [2023-08-26 17:55:10,102 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting t1Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 17:55:10,103 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 17:55:10,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1238470251, now seen corresponding path program 2 times [2023-08-26 17:55:10,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 17:55:10,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428079950] [2023-08-26 17:55:10,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 17:55:10,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 17:55:10,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 17:55:10,251 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 17:55:10,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 17:55:10,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428079950] [2023-08-26 17:55:10,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428079950] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 17:55:10,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748421509] [2023-08-26 17:55:10,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 17:55:10,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 17:55:10,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 17:55:10,253 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 17:55:10,266 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 17:55:10,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 17:55:10,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 17:55:10,419 INFO L262 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-26 17:55:10,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 17:55:10,483 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 17:55:10,484 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 17:55:10,604 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 17:55:10,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748421509] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 17:55:10,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 17:55:10,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2023-08-26 17:55:10,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772550816] [2023-08-26 17:55:10,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 17:55:10,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-26 17:55:10,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 17:55:10,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-26 17:55:10,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2023-08-26 17:55:10,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 349 [2023-08-26 17:55:10,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 957 places, 2642 transitions, 48627 flow. Second operand has 20 states, 20 states have (on average 145.25) internal successors, (2905), 20 states have internal predecessors, (2905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 17:55:10,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 17:55:10,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 349 [2023-08-26 17:55:10,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-08-26 17:55:30,699 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-26 17:55:30,700 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 17:55:31,733 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 17:55:31,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2023-08-26 17:55:31,960 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t1Err2ASSERT_VIOLATIONASSERT (21 of 22 remaining) [2023-08-26 17:55:31,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2023-08-26 17:55:31,960 WARN L619 AbstractCegarLoop]: Verification canceled: while executing Executor. [2023-08-26 17:55:31,961 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 22 remaining) [2023-08-26 17:55:31,961 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 22 remaining) [2023-08-26 17:55:31,962 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 22 remaining) [2023-08-26 17:55:31,962 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 22 remaining) [2023-08-26 17:55:31,962 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 22 remaining) [2023-08-26 17:55:31,962 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 22 remaining) [2023-08-26 17:55:31,962 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 22 remaining) [2023-08-26 17:55:31,962 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 22 remaining) [2023-08-26 17:55:31,962 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 22 remaining) [2023-08-26 17:55:31,962 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 22 remaining) [2023-08-26 17:55:31,962 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 22 remaining) [2023-08-26 17:55:31,963 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 22 remaining) [2023-08-26 17:55:31,963 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t1Err2ASSERT_VIOLATIONASSERT (8 of 22 remaining) [2023-08-26 17:55:31,963 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t2Err2ASSERT_VIOLATIONASSERT (7 of 22 remaining) [2023-08-26 17:55:31,963 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 22 remaining) [2023-08-26 17:55:31,963 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 22 remaining) [2023-08-26 17:55:31,963 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 22 remaining) [2023-08-26 17:55:31,963 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 22 remaining) [2023-08-26 17:55:31,963 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t2Err2ASSERT_VIOLATIONASSERT (2 of 22 remaining) [2023-08-26 17:55:31,963 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 22 remaining) [2023-08-26 17:55:31,963 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 22 remaining) [2023-08-26 17:55:31,964 INFO L445 BasicCegarLoop]: Path program histogram: [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 17:55:31,967 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 17:55:31,968 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 17:55:31,970 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 05:55:31 BasicIcfg [2023-08-26 17:55:31,970 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 17:55:31,970 INFO L158 Benchmark]: Toolchain (without parser) took 811189.80ms. Allocated memory was 369.1MB in the beginning and 9.7GB in the end (delta: 9.3GB). Free memory was 343.7MB in the beginning and 6.2GB in the end (delta: -5.9GB). Peak memory consumption was 3.6GB. Max. memory is 16.0GB. [2023-08-26 17:55:31,970 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 369.1MB. Free memory is still 344.9MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 17:55:31,970 INFO L158 Benchmark]: CACSL2BoogieTranslator took 579.94ms. Allocated memory is still 369.1MB. Free memory was 343.7MB in the beginning and 314.3MB in the end (delta: 29.3MB). Peak memory consumption was 29.4MB. Max. memory is 16.0GB. [2023-08-26 17:55:31,971 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.13ms. Allocated memory is still 369.1MB. Free memory was 314.3MB in the beginning and 311.8MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 17:55:31,971 INFO L158 Benchmark]: Boogie Preprocessor took 27.98ms. Allocated memory is still 369.1MB. Free memory was 311.8MB in the beginning and 309.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 17:55:31,971 INFO L158 Benchmark]: RCFGBuilder took 535.39ms. Allocated memory is still 369.1MB. Free memory was 309.8MB in the beginning and 342.9MB in the end (delta: -33.1MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-26 17:55:31,971 INFO L158 Benchmark]: TraceAbstraction took 809993.86ms. Allocated memory was 369.1MB in the beginning and 9.7GB in the end (delta: 9.3GB). Free memory was 342.0MB in the beginning and 6.2GB in the end (delta: -5.9GB). Peak memory consumption was 3.6GB. Max. memory is 16.0GB. [2023-08-26 17:55:31,972 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 369.1MB. Free memory is still 344.9MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 579.94ms. Allocated memory is still 369.1MB. Free memory was 343.7MB in the beginning and 314.3MB in the end (delta: 29.3MB). Peak memory consumption was 29.4MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 46.13ms. Allocated memory is still 369.1MB. Free memory was 314.3MB in the beginning and 311.8MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 27.98ms. Allocated memory is still 369.1MB. Free memory was 311.8MB in the beginning and 309.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 535.39ms. Allocated memory is still 369.1MB. Free memory was 309.8MB in the beginning and 342.9MB in the end (delta: -33.1MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * TraceAbstraction took 809993.86ms. Allocated memory was 369.1MB in the beginning and 9.7GB in the end (delta: 9.3GB). Free memory was 342.0MB in the beginning and 6.2GB in the end (delta: -5.9GB). Peak memory consumption was 3.6GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 261]: Unsoundness Warning unspecified type, defaulting to int C: short [261] - GenericResultAtLocation [Line: 261]: Unsoundness Warning unspecified type, defaulting to int C: short [261] - GenericResultAtLocation [Line: 753]: Unsoundness Warning unspecified type, defaulting to int C: unsigned short [753] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.2s, 155 PlacesBefore, 46 PlacesAfterwards, 160 TransitionsBefore, 44 TransitionsAfterwards, 8840 CoEnabledTransitionPairs, 6 FixpointIterations, 36 TrivialSequentialCompositions, 104 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 31 ConcurrentYvCompositions, 7 ChoiceCompositions, 178 TotalNumberOfCompositions, 13733 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 9590, independent: 9375, independent conditional: 0, independent unconditional: 9375, dependent: 215, dependent conditional: 0, dependent unconditional: 215, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 5015, independent: 4962, independent conditional: 0, independent unconditional: 4962, dependent: 53, dependent conditional: 0, dependent unconditional: 53, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 9590, independent: 4413, independent conditional: 0, independent unconditional: 4413, dependent: 162, dependent conditional: 0, dependent unconditional: 162, unknown: 5015, unknown conditional: 0, unknown unconditional: 5015] , Statistics on independence cache: Total cache size (in pairs): 236, Positive cache size: 217, Positive conditional cache size: 0, Positive unconditional cache size: 217, Negative cache size: 19, Negative conditional cache size: 0, Negative unconditional cache size: 19, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 20]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: 1021]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - TimeoutResultAtElement [Line: 1022]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: 20]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 264 locations, 22 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: 809.9s, OverallIterations: 29, TraceHistogramMax: 4, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 753.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.4s, HoareTripleCheckerStatistics: 368 mSolverCounterUnknown, 14307 SdHoareTripleChecker+Valid, 113.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 14307 mSDsluCounter, 13 SdHoareTripleChecker+Invalid, 108.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 3190 IncrementalHoareTripleChecker+Unchecked, 10 mSDsCounter, 1080 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 53171 IncrementalHoareTripleChecker+Invalid, 57809 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1080 mSolverCounterUnsat, 3 mSDtfsCounter, 53171 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1906 GetRequests, 423 SyntacticMatches, 37 SemanticMatches, 1446 ConstructedPredicates, 7 IntricatePredicates, 1 DeprecatedPredicates, 67160 ImplicationChecksByTransitivity, 565.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48627occurred in iteration=28, InterpolantAutomatonStates: 940, 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: 0.3s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 47.1s InterpolantComputationTime, 1007 NumberOfCodeBlocks, 999 NumberOfCodeBlocksAsserted, 50 NumberOfCheckSat, 1311 ConstructedInterpolants, 83 QuantifiedInterpolants, 21889 SizeOfPredicates, 253 NumberOfNonLiveVariables, 4089 ConjunctsInSsa, 650 ConjunctsInUnsatCore, 55 InterpolantComputations, 17 PerfectInterpolantSequences, 78/550 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