/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/pthread/triangular-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 11:41:08,152 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 11:41:08,224 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 11:41:08,232 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 11:41:08,233 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 11:41:08,263 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 11:41:08,264 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 11:41:08,264 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 11:41:08,265 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 11:41:08,268 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 11:41:08,268 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 11:41:08,269 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 11:41:08,269 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 11:41:08,270 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 11:41:08,270 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 11:41:08,270 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 11:41:08,271 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 11:41:08,271 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 11:41:08,271 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 11:41:08,271 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 11:41:08,272 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 11:41:08,272 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 11:41:08,272 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 11:41:08,273 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 11:41:08,273 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 11:41:08,273 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 11:41:08,273 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 11:41:08,274 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 11:41:08,274 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 11:41:08,274 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 11:41:08,275 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 11:41:08,275 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 11:41:08,275 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 11:41:08,275 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 11:41:08,276 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 11:41:08,276 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 11:41:08,600 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 11:41:08,622 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 11:41:08,624 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 11:41:08,625 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 11:41:08,625 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 11:41:08,627 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-2.i [2023-08-26 11:41:09,884 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 11:41:10,189 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 11:41:10,189 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-2.i [2023-08-26 11:41:10,208 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41ccf83ed/ae218a8af32f4046a5080782bcc2bd95/FLAGb5580d854 [2023-08-26 11:41:10,223 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41ccf83ed/ae218a8af32f4046a5080782bcc2bd95 [2023-08-26 11:41:10,227 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 11:41:10,228 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 11:41:10,230 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 11:41:10,231 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 11:41:10,233 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 11:41:10,234 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 11:41:10" (1/1) ... [2023-08-26 11:41:10,235 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35fcc5e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:10, skipping insertion in model container [2023-08-26 11:41:10,235 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 11:41:10" (1/1) ... [2023-08-26 11:41:10,281 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 11:41:10,585 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 11:41:10,596 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 11:41:10,625 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [245] [2023-08-26 11:41:10,626 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [245] [2023-08-26 11:41:10,643 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 11:41:10,677 WARN L669 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 11:41:10,678 WARN L669 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-26 11:41:10,684 INFO L206 MainTranslator]: Completed translation [2023-08-26 11:41:10,684 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:10 WrapperNode [2023-08-26 11:41:10,685 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 11:41:10,686 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 11:41:10,686 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 11:41:10,686 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 11:41:10,692 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:10" (1/1) ... [2023-08-26 11:41:10,706 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:10" (1/1) ... [2023-08-26 11:41:10,723 INFO L138 Inliner]: procedures = 169, calls = 25, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 50 [2023-08-26 11:41:10,724 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 11:41:10,724 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 11:41:10,724 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 11:41:10,724 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 11:41:10,732 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:10" (1/1) ... [2023-08-26 11:41:10,732 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:10" (1/1) ... [2023-08-26 11:41:10,734 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:10" (1/1) ... [2023-08-26 11:41:10,734 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:10" (1/1) ... [2023-08-26 11:41:10,740 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:10" (1/1) ... [2023-08-26 11:41:10,743 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:10" (1/1) ... [2023-08-26 11:41:10,744 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:10" (1/1) ... [2023-08-26 11:41:10,745 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:10" (1/1) ... [2023-08-26 11:41:10,747 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 11:41:10,748 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 11:41:10,748 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 11:41:10,748 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 11:41:10,749 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:10" (1/1) ... [2023-08-26 11:41:10,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 11:41:10,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:41:10,776 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 11:41:10,787 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 11:41:10,818 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-26 11:41:10,819 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-26 11:41:10,820 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-26 11:41:10,820 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-26 11:41:10,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 11:41:10,820 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-26 11:41:10,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 11:41:10,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 11:41:10,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 11:41:10,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 11:41:10,821 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-26 11:41:10,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 11:41:10,821 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 11:41:10,822 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 11:41:10,953 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 11:41:10,956 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 11:41:11,167 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 11:41:11,172 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 11:41:11,172 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-26 11:41:11,173 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 11:41:11 BoogieIcfgContainer [2023-08-26 11:41:11,174 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 11:41:11,175 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 11:41:11,175 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 11:41:11,178 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 11:41:11,178 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 11:41:10" (1/3) ... [2023-08-26 11:41:11,179 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26b75b93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 11:41:11, skipping insertion in model container [2023-08-26 11:41:11,179 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 11:41:10" (2/3) ... [2023-08-26 11:41:11,179 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26b75b93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 11:41:11, skipping insertion in model container [2023-08-26 11:41:11,179 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 11:41:11" (3/3) ... [2023-08-26 11:41:11,180 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-2.i [2023-08-26 11:41:11,196 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 11:41:11,197 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2023-08-26 11:41:11,197 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 11:41:11,277 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 11:41:11,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 77 places, 76 transitions, 162 flow [2023-08-26 11:41:11,345 INFO L124 PetriNetUnfolderBase]: 6/74 cut-off events. [2023-08-26 11:41:11,346 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:41:11,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 74 events. 6/74 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 99 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2023-08-26 11:41:11,352 INFO L82 GeneralOperation]: Start removeDead. Operand has 77 places, 76 transitions, 162 flow [2023-08-26 11:41:11,356 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 75 places, 74 transitions, 154 flow [2023-08-26 11:41:11,359 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 11:41:11,367 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 75 places, 74 transitions, 154 flow [2023-08-26 11:41:11,370 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 75 places, 74 transitions, 154 flow [2023-08-26 11:41:11,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 75 places, 74 transitions, 154 flow [2023-08-26 11:41:11,388 INFO L124 PetriNetUnfolderBase]: 6/74 cut-off events. [2023-08-26 11:41:11,388 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:41:11,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 74 events. 6/74 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 99 event pairs, 0 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2023-08-26 11:41:11,397 INFO L119 LiptonReduction]: Number of co-enabled transitions 1440 [2023-08-26 11:41:13,494 INFO L134 LiptonReduction]: Checked pairs total: 1354 [2023-08-26 11:41:13,494 INFO L136 LiptonReduction]: Total number of compositions: 81 [2023-08-26 11:41:13,506 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 11:41:13,511 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;@f2abe49, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 11:41:13,511 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-08-26 11:41:13,512 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 11:41:13,512 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 11:41:13,513 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:41:13,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:13,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 11:41:13,514 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:13,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:13,517 INFO L85 PathProgramCache]: Analyzing trace with hash 313, now seen corresponding path program 1 times [2023-08-26 11:41:13,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:13,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946669881] [2023-08-26 11:41:13,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:13,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:13,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:13,621 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 11:41:13,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:13,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946669881] [2023-08-26 11:41:13,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946669881] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:41:13,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:41:13,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 11:41:13,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490302632] [2023-08-26 11:41:13,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:41:13,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 11:41:13,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:13,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 11:41:13,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 11:41:13,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 157 [2023-08-26 11:41:13,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 18 transitions, 42 flow. Second operand has 2 states, 2 states have (on average 69.5) internal successors, (139), 2 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:13,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:13,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 157 [2023-08-26 11:41:13,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:13,705 INFO L124 PetriNetUnfolderBase]: 76/125 cut-off events. [2023-08-26 11:41:13,705 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 11:41:13,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 125 events. 76/125 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 298 event pairs, 48 based on Foata normal form. 0/82 useless extension candidates. Maximal degree in co-relation 252. Up to 126 conditions per place. [2023-08-26 11:41:13,707 INFO L140 encePairwiseOnDemand]: 154/157 looper letters, 14 selfloop transitions, 0 changer transitions 1/15 dead transitions. [2023-08-26 11:41:13,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 15 transitions, 66 flow [2023-08-26 11:41:13,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 11:41:13,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 11:41:13,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 156 transitions. [2023-08-26 11:41:13,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4968152866242038 [2023-08-26 11:41:13,718 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 156 transitions. [2023-08-26 11:41:13,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 156 transitions. [2023-08-26 11:41:13,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:13,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 156 transitions. [2023-08-26 11:41:13,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:13,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:13,728 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:13,729 INFO L175 Difference]: Start difference. First operand has 22 places, 18 transitions, 42 flow. Second operand 2 states and 156 transitions. [2023-08-26 11:41:13,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 15 transitions, 66 flow [2023-08-26 11:41:13,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 15 transitions, 64 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 11:41:13,732 INFO L231 Difference]: Finished difference. Result has 19 places, 14 transitions, 32 flow [2023-08-26 11:41:13,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=32, PETRI_PLACES=19, PETRI_TRANSITIONS=14} [2023-08-26 11:41:13,739 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -3 predicate places. [2023-08-26 11:41:13,739 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 14 transitions, 32 flow [2023-08-26 11:41:13,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 69.5) internal successors, (139), 2 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:13,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:13,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 11:41:13,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 11:41:13,741 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:13,742 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:13,742 INFO L85 PathProgramCache]: Analyzing trace with hash 306362, now seen corresponding path program 1 times [2023-08-26 11:41:13,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:13,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603511939] [2023-08-26 11:41:13,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:13,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:13,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:13,942 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 11:41:13,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:13,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603511939] [2023-08-26 11:41:13,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603511939] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:41:13,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:41:13,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:41:13,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882858362] [2023-08-26 11:41:13,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:41:13,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:41:13,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:13,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:41:13,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:41:13,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 157 [2023-08-26 11:41:13,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 14 transitions, 32 flow. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:13,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:13,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 157 [2023-08-26 11:41:13,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:13,972 INFO L124 PetriNetUnfolderBase]: 55/92 cut-off events. [2023-08-26 11:41:13,972 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:41:13,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 92 events. 55/92 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 194 event pairs, 34 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 192. Up to 92 conditions per place. [2023-08-26 11:41:13,974 INFO L140 encePairwiseOnDemand]: 155/157 looper letters, 12 selfloop transitions, 1 changer transitions 0/13 dead transitions. [2023-08-26 11:41:13,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 13 transitions, 56 flow [2023-08-26 11:41:13,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:41:13,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:41:13,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 185 transitions. [2023-08-26 11:41:13,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39278131634819535 [2023-08-26 11:41:13,976 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 185 transitions. [2023-08-26 11:41:13,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 185 transitions. [2023-08-26 11:41:13,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:13,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 185 transitions. [2023-08-26 11:41:13,978 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:13,979 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:13,980 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:13,980 INFO L175 Difference]: Start difference. First operand has 19 places, 14 transitions, 32 flow. Second operand 3 states and 185 transitions. [2023-08-26 11:41:13,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 13 transitions, 56 flow [2023-08-26 11:41:13,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 13 transitions, 56 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 11:41:13,981 INFO L231 Difference]: Finished difference. Result has 19 places, 13 transitions, 32 flow [2023-08-26 11:41:13,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=32, PETRI_PLACES=19, PETRI_TRANSITIONS=13} [2023-08-26 11:41:13,982 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -3 predicate places. [2023-08-26 11:41:13,982 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 13 transitions, 32 flow [2023-08-26 11:41:13,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:13,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:13,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 11:41:13,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 11:41:13,983 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:13,983 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:13,983 INFO L85 PathProgramCache]: Analyzing trace with hash 306361, now seen corresponding path program 1 times [2023-08-26 11:41:13,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:13,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748114713] [2023-08-26 11:41:13,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:13,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:14,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:14,088 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 11:41:14,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:14,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748114713] [2023-08-26 11:41:14,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748114713] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:41:14,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:41:14,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 11:41:14,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883288056] [2023-08-26 11:41:14,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:41:14,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 11:41:14,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:14,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 11:41:14,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 11:41:14,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 157 [2023-08-26 11:41:14,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 13 transitions, 32 flow. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:14,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:14,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 157 [2023-08-26 11:41:14,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:14,128 INFO L124 PetriNetUnfolderBase]: 52/86 cut-off events. [2023-08-26 11:41:14,128 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:41:14,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185 conditions, 86 events. 52/86 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 170 event pairs, 32 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 181. Up to 86 conditions per place. [2023-08-26 11:41:14,129 INFO L140 encePairwiseOnDemand]: 155/157 looper letters, 11 selfloop transitions, 1 changer transitions 0/12 dead transitions. [2023-08-26 11:41:14,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 12 transitions, 54 flow [2023-08-26 11:41:14,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 11:41:14,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 11:41:14,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 178 transitions. [2023-08-26 11:41:14,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37791932059447986 [2023-08-26 11:41:14,134 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 178 transitions. [2023-08-26 11:41:14,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 178 transitions. [2023-08-26 11:41:14,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:14,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 178 transitions. [2023-08-26 11:41:14,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:14,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:14,137 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:14,137 INFO L175 Difference]: Start difference. First operand has 19 places, 13 transitions, 32 flow. Second operand 3 states and 178 transitions. [2023-08-26 11:41:14,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 12 transitions, 54 flow [2023-08-26 11:41:14,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 12 transitions, 53 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:41:14,138 INFO L231 Difference]: Finished difference. Result has 19 places, 12 transitions, 31 flow [2023-08-26 11:41:14,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=29, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=31, PETRI_PLACES=19, PETRI_TRANSITIONS=12} [2023-08-26 11:41:14,139 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, -3 predicate places. [2023-08-26 11:41:14,139 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 12 transitions, 31 flow [2023-08-26 11:41:14,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:14,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:14,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 11:41:14,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 11:41:14,140 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:14,144 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:14,145 INFO L85 PathProgramCache]: Analyzing trace with hash 537039974, now seen corresponding path program 1 times [2023-08-26 11:41:14,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:14,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720604277] [2023-08-26 11:41:14,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:14,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:14,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:14,275 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 11:41:14,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:14,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720604277] [2023-08-26 11:41:14,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720604277] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:41:14,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:41:14,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 11:41:14,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932382766] [2023-08-26 11:41:14,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:41:14,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 11:41:14,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:14,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 11:41:14,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 11:41:14,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 11:41:14,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 12 transitions, 31 flow. Second operand has 4 states, 4 states have (on average 61.5) internal successors, (246), 4 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:14,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:14,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 11:41:14,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:14,339 INFO L124 PetriNetUnfolderBase]: 64/107 cut-off events. [2023-08-26 11:41:14,339 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 11:41:14,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 228 conditions, 107 events. 64/107 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 232 event pairs, 11 based on Foata normal form. 9/87 useless extension candidates. Maximal degree in co-relation 224. Up to 55 conditions per place. [2023-08-26 11:41:14,340 INFO L140 encePairwiseOnDemand]: 153/157 looper letters, 18 selfloop transitions, 4 changer transitions 2/24 dead transitions. [2023-08-26 11:41:14,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 24 transitions, 103 flow [2023-08-26 11:41:14,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 11:41:14,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 11:41:14,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 265 transitions. [2023-08-26 11:41:14,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42197452229299365 [2023-08-26 11:41:14,342 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 265 transitions. [2023-08-26 11:41:14,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 265 transitions. [2023-08-26 11:41:14,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:14,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 265 transitions. [2023-08-26 11:41:14,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 66.25) internal successors, (265), 4 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:14,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 157.0) internal successors, (785), 5 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:14,346 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 157.0) internal successors, (785), 5 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:14,346 INFO L175 Difference]: Start difference. First operand has 19 places, 12 transitions, 31 flow. Second operand 4 states and 265 transitions. [2023-08-26 11:41:14,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 24 transitions, 103 flow [2023-08-26 11:41:14,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 24 transitions, 102 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 11:41:14,347 INFO L231 Difference]: Finished difference. Result has 23 places, 15 transitions, 55 flow [2023-08-26 11:41:14,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=30, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=55, PETRI_PLACES=23, PETRI_TRANSITIONS=15} [2023-08-26 11:41:14,348 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 1 predicate places. [2023-08-26 11:41:14,348 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 15 transitions, 55 flow [2023-08-26 11:41:14,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.5) internal successors, (246), 4 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:14,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:14,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:41:14,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 11:41:14,349 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:14,349 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:14,349 INFO L85 PathProgramCache]: Analyzing trace with hash 698883682, now seen corresponding path program 1 times [2023-08-26 11:41:14,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:14,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629565330] [2023-08-26 11:41:14,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:14,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:14,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:14,434 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 11:41:14,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:14,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629565330] [2023-08-26 11:41:14,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629565330] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:41:14,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:41:14,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:41:14,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28087423] [2023-08-26 11:41:14,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:41:14,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 11:41:14,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:14,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 11:41:14,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 11:41:14,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 11:41:14,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 15 transitions, 55 flow. Second operand has 5 states, 5 states have (on average 61.6) internal successors, (308), 5 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:14,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:14,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 11:41:14,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:14,528 INFO L124 PetriNetUnfolderBase]: 126/217 cut-off events. [2023-08-26 11:41:14,528 INFO L125 PetriNetUnfolderBase]: For 73/73 co-relation queries the response was YES. [2023-08-26 11:41:14,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 550 conditions, 217 events. 126/217 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 667 event pairs, 19 based on Foata normal form. 10/191 useless extension candidates. Maximal degree in co-relation 544. Up to 89 conditions per place. [2023-08-26 11:41:14,530 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 33 selfloop transitions, 9 changer transitions 0/42 dead transitions. [2023-08-26 11:41:14,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 42 transitions, 217 flow [2023-08-26 11:41:14,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 11:41:14,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 11:41:14,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 398 transitions. [2023-08-26 11:41:14,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42250530785562634 [2023-08-26 11:41:14,532 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 398 transitions. [2023-08-26 11:41:14,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 398 transitions. [2023-08-26 11:41:14,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:14,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 398 transitions. [2023-08-26 11:41:14,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 66.33333333333333) internal successors, (398), 6 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:14,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 157.0) internal successors, (1099), 7 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:14,536 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 157.0) internal successors, (1099), 7 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:14,536 INFO L175 Difference]: Start difference. First operand has 23 places, 15 transitions, 55 flow. Second operand 6 states and 398 transitions. [2023-08-26 11:41:14,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 42 transitions, 217 flow [2023-08-26 11:41:14,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 42 transitions, 217 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 11:41:14,538 INFO L231 Difference]: Finished difference. Result has 32 places, 24 transitions, 136 flow [2023-08-26 11:41:14,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=136, PETRI_PLACES=32, PETRI_TRANSITIONS=24} [2023-08-26 11:41:14,538 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 10 predicate places. [2023-08-26 11:41:14,539 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 24 transitions, 136 flow [2023-08-26 11:41:14,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 61.6) internal successors, (308), 5 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:14,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:14,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:41:14,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 11:41:14,540 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:14,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:14,541 INFO L85 PathProgramCache]: Analyzing trace with hash 698901352, now seen corresponding path program 2 times [2023-08-26 11:41:14,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:14,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249201016] [2023-08-26 11:41:14,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:14,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:14,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:14,665 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 11:41:14,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:14,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249201016] [2023-08-26 11:41:14,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249201016] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:41:14,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:41:14,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 11:41:14,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665337805] [2023-08-26 11:41:14,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:41:14,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 11:41:14,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:14,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 11:41:14,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 11:41:14,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 11:41:14,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 24 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 61.6) internal successors, (308), 5 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:14,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:14,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 11:41:14,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:14,751 INFO L124 PetriNetUnfolderBase]: 114/199 cut-off events. [2023-08-26 11:41:14,751 INFO L125 PetriNetUnfolderBase]: For 280/280 co-relation queries the response was YES. [2023-08-26 11:41:14,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 657 conditions, 199 events. 114/199 cut-off events. For 280/280 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 625 event pairs, 19 based on Foata normal form. 10/209 useless extension candidates. Maximal degree in co-relation 646. Up to 84 conditions per place. [2023-08-26 11:41:14,753 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 29 selfloop transitions, 9 changer transitions 4/42 dead transitions. [2023-08-26 11:41:14,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 42 transitions, 286 flow [2023-08-26 11:41:14,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 11:41:14,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 11:41:14,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 333 transitions. [2023-08-26 11:41:14,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42420382165605097 [2023-08-26 11:41:14,755 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 333 transitions. [2023-08-26 11:41:14,755 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 333 transitions. [2023-08-26 11:41:14,756 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:14,756 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 333 transitions. [2023-08-26 11:41:14,757 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 66.6) internal successors, (333), 5 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:14,758 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:14,758 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 157.0) internal successors, (942), 6 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:14,758 INFO L175 Difference]: Start difference. First operand has 32 places, 24 transitions, 136 flow. Second operand 5 states and 333 transitions. [2023-08-26 11:41:14,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 42 transitions, 286 flow [2023-08-26 11:41:14,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 42 transitions, 284 flow, removed 1 selfloop flow, removed 0 redundant places. [2023-08-26 11:41:14,762 INFO L231 Difference]: Finished difference. Result has 38 places, 26 transitions, 184 flow [2023-08-26 11:41:14,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=184, PETRI_PLACES=38, PETRI_TRANSITIONS=26} [2023-08-26 11:41:14,762 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 16 predicate places. [2023-08-26 11:41:14,763 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 26 transitions, 184 flow [2023-08-26 11:41:14,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 61.6) internal successors, (308), 5 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:14,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:14,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:41:14,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 11:41:14,763 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:14,764 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:14,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1937873995, now seen corresponding path program 1 times [2023-08-26 11:41:14,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:14,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790702399] [2023-08-26 11:41:14,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:14,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:14,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:14,848 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 11:41:14,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:14,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790702399] [2023-08-26 11:41:14,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790702399] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:41:14,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:41:14,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 11:41:14,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185793339] [2023-08-26 11:41:14,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:41:14,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 11:41:14,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:14,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 11:41:14,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-26 11:41:14,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 11:41:14,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 26 transitions, 184 flow. Second operand has 6 states, 6 states have (on average 61.666666666666664) internal successors, (370), 6 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:14,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:14,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 11:41:14,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:15,009 INFO L124 PetriNetUnfolderBase]: 126/219 cut-off events. [2023-08-26 11:41:15,009 INFO L125 PetriNetUnfolderBase]: For 533/533 co-relation queries the response was YES. [2023-08-26 11:41:15,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 797 conditions, 219 events. 126/219 cut-off events. For 533/533 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 705 event pairs, 19 based on Foata normal form. 4/223 useless extension candidates. Maximal degree in co-relation 783. Up to 86 conditions per place. [2023-08-26 11:41:15,012 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 32 selfloop transitions, 16 changer transitions 11/59 dead transitions. [2023-08-26 11:41:15,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 59 transitions, 427 flow [2023-08-26 11:41:15,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 11:41:15,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 11:41:15,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 592 transitions. [2023-08-26 11:41:15,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.418966737438075 [2023-08-26 11:41:15,015 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 592 transitions. [2023-08-26 11:41:15,015 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 592 transitions. [2023-08-26 11:41:15,015 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:15,015 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 592 transitions. [2023-08-26 11:41:15,017 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 65.77777777777777) internal successors, (592), 9 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:15,019 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 157.0) internal successors, (1570), 10 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:15,021 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 157.0) internal successors, (1570), 10 states have internal predecessors, (1570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:15,021 INFO L175 Difference]: Start difference. First operand has 38 places, 26 transitions, 184 flow. Second operand 9 states and 592 transitions. [2023-08-26 11:41:15,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 59 transitions, 427 flow [2023-08-26 11:41:15,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 59 transitions, 390 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-08-26 11:41:15,029 INFO L231 Difference]: Finished difference. Result has 45 places, 32 transitions, 253 flow [2023-08-26 11:41:15,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=253, PETRI_PLACES=45, PETRI_TRANSITIONS=32} [2023-08-26 11:41:15,030 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 23 predicate places. [2023-08-26 11:41:15,030 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 32 transitions, 253 flow [2023-08-26 11:41:15,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 61.666666666666664) internal successors, (370), 6 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:15,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:15,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:41:15,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 11:41:15,032 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:15,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:15,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1938173455, now seen corresponding path program 2 times [2023-08-26 11:41:15,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:15,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180419851] [2023-08-26 11:41:15,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:15,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:15,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:15,146 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 11:41:15,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:15,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180419851] [2023-08-26 11:41:15,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180419851] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:41:15,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:41:15,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 11:41:15,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756464145] [2023-08-26 11:41:15,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:41:15,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 11:41:15,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:15,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 11:41:15,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-08-26 11:41:15,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 11:41:15,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 32 transitions, 253 flow. Second operand has 6 states, 6 states have (on average 61.666666666666664) internal successors, (370), 6 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:15,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:15,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 11:41:15,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:15,268 INFO L124 PetriNetUnfolderBase]: 162/283 cut-off events. [2023-08-26 11:41:15,268 INFO L125 PetriNetUnfolderBase]: For 793/793 co-relation queries the response was YES. [2023-08-26 11:41:15,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1093 conditions, 283 events. 162/283 cut-off events. For 793/793 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 948 event pairs, 22 based on Foata normal form. 8/291 useless extension candidates. Maximal degree in co-relation 1077. Up to 77 conditions per place. [2023-08-26 11:41:15,272 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 38 selfloop transitions, 20 changer transitions 3/61 dead transitions. [2023-08-26 11:41:15,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 61 transitions, 499 flow [2023-08-26 11:41:15,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 11:41:15,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 11:41:15,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 526 transitions. [2023-08-26 11:41:15,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41878980891719747 [2023-08-26 11:41:15,274 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 526 transitions. [2023-08-26 11:41:15,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 526 transitions. [2023-08-26 11:41:15,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:15,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 526 transitions. [2023-08-26 11:41:15,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 65.75) internal successors, (526), 8 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:15,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 157.0) internal successors, (1413), 9 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:15,278 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 157.0) internal successors, (1413), 9 states have internal predecessors, (1413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:15,278 INFO L175 Difference]: Start difference. First operand has 45 places, 32 transitions, 253 flow. Second operand 8 states and 526 transitions. [2023-08-26 11:41:15,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 61 transitions, 499 flow [2023-08-26 11:41:15,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 61 transitions, 469 flow, removed 9 selfloop flow, removed 2 redundant places. [2023-08-26 11:41:15,284 INFO L231 Difference]: Finished difference. Result has 54 places, 38 transitions, 346 flow [2023-08-26 11:41:15,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=346, PETRI_PLACES=54, PETRI_TRANSITIONS=38} [2023-08-26 11:41:15,286 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 32 predicate places. [2023-08-26 11:41:15,287 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 38 transitions, 346 flow [2023-08-26 11:41:15,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 61.666666666666664) internal successors, (370), 6 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:15,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:15,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:41:15,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 11:41:15,287 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:15,288 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:15,288 INFO L85 PathProgramCache]: Analyzing trace with hash 1978408975, now seen corresponding path program 3 times [2023-08-26 11:41:15,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:15,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794387281] [2023-08-26 11:41:15,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:15,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:15,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:15,393 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 11:41:15,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:15,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794387281] [2023-08-26 11:41:15,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794387281] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 11:41:15,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 11:41:15,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 11:41:15,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367388089] [2023-08-26 11:41:15,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 11:41:15,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 11:41:15,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:15,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 11:41:15,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-26 11:41:15,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 11:41:15,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 38 transitions, 346 flow. Second operand has 6 states, 6 states have (on average 61.666666666666664) internal successors, (370), 6 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:15,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:15,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 11:41:15,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:15,504 INFO L124 PetriNetUnfolderBase]: 150/263 cut-off events. [2023-08-26 11:41:15,504 INFO L125 PetriNetUnfolderBase]: For 1223/1223 co-relation queries the response was YES. [2023-08-26 11:41:15,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1194 conditions, 263 events. 150/263 cut-off events. For 1223/1223 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 893 event pairs, 22 based on Foata normal form. 8/271 useless extension candidates. Maximal degree in co-relation 1174. Up to 65 conditions per place. [2023-08-26 11:41:15,506 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 30 selfloop transitions, 20 changer transitions 8/58 dead transitions. [2023-08-26 11:41:15,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 58 transitions, 568 flow [2023-08-26 11:41:15,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 11:41:15,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 11:41:15,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 460 transitions. [2023-08-26 11:41:15,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41856232939035487 [2023-08-26 11:41:15,509 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 460 transitions. [2023-08-26 11:41:15,509 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 460 transitions. [2023-08-26 11:41:15,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:15,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 460 transitions. [2023-08-26 11:41:15,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 65.71428571428571) internal successors, (460), 7 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:15,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 157.0) internal successors, (1256), 8 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:15,512 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 157.0) internal successors, (1256), 8 states have internal predecessors, (1256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:15,512 INFO L175 Difference]: Start difference. First operand has 54 places, 38 transitions, 346 flow. Second operand 7 states and 460 transitions. [2023-08-26 11:41:15,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 58 transitions, 568 flow [2023-08-26 11:41:15,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 58 transitions, 533 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-08-26 11:41:15,521 INFO L231 Difference]: Finished difference. Result has 59 places, 39 transitions, 390 flow [2023-08-26 11:41:15,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=390, PETRI_PLACES=59, PETRI_TRANSITIONS=39} [2023-08-26 11:41:15,522 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 37 predicate places. [2023-08-26 11:41:15,523 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 39 transitions, 390 flow [2023-08-26 11:41:15,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 61.666666666666664) internal successors, (370), 6 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:15,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:15,526 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:41:15,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 11:41:15,526 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:15,527 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:15,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1201164613, now seen corresponding path program 4 times [2023-08-26 11:41:15,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:15,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265028518] [2023-08-26 11:41:15,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:15,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:15,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:15,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:15,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:15,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265028518] [2023-08-26 11:41:15,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265028518] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 11:41:15,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202328101] [2023-08-26 11:41:15,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 11:41:15,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:41:15,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:41:15,637 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 11:41:15,685 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 11:41:15,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 11:41:15,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 11:41:15,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 11:41:15,744 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 11:41:15,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:15,848 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 11:41:15,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:15,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202328101] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 11:41:15,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 11:41:15,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-08-26 11:41:15,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69661994] [2023-08-26 11:41:15,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 11:41:15,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-26 11:41:15,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:15,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-26 11:41:15,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-08-26 11:41:15,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 11:41:15,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 39 transitions, 390 flow. Second operand has 12 states, 12 states have (on average 61.916666666666664) internal successors, (743), 12 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:15,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:15,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 11:41:15,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:16,176 INFO L124 PetriNetUnfolderBase]: 198/343 cut-off events. [2023-08-26 11:41:16,176 INFO L125 PetriNetUnfolderBase]: For 2136/2136 co-relation queries the response was YES. [2023-08-26 11:41:16,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1661 conditions, 343 events. 198/343 cut-off events. For 2136/2136 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1152 event pairs, 18 based on Foata normal form. 16/359 useless extension candidates. Maximal degree in co-relation 1639. Up to 87 conditions per place. [2023-08-26 11:41:16,179 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 34 selfloop transitions, 35 changer transitions 22/91 dead transitions. [2023-08-26 11:41:16,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 91 transitions, 948 flow [2023-08-26 11:41:16,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 11:41:16,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 11:41:16,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 914 transitions. [2023-08-26 11:41:16,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41583257506824384 [2023-08-26 11:41:16,182 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 914 transitions. [2023-08-26 11:41:16,183 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 914 transitions. [2023-08-26 11:41:16,183 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:16,183 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 914 transitions. [2023-08-26 11:41:16,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 65.28571428571429) internal successors, (914), 14 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:16,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 157.0) internal successors, (2355), 15 states have internal predecessors, (2355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:16,189 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 157.0) internal successors, (2355), 15 states have internal predecessors, (2355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:16,189 INFO L175 Difference]: Start difference. First operand has 59 places, 39 transitions, 390 flow. Second operand 14 states and 914 transitions. [2023-08-26 11:41:16,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 91 transitions, 948 flow [2023-08-26 11:41:16,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 91 transitions, 886 flow, removed 15 selfloop flow, removed 5 redundant places. [2023-08-26 11:41:16,196 INFO L231 Difference]: Finished difference. Result has 72 places, 55 transitions, 691 flow [2023-08-26 11:41:16,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=691, PETRI_PLACES=72, PETRI_TRANSITIONS=55} [2023-08-26 11:41:16,197 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 50 predicate places. [2023-08-26 11:41:16,198 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 55 transitions, 691 flow [2023-08-26 11:41:16,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 61.916666666666664) internal successors, (743), 12 states have internal predecessors, (743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:16,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:16,198 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:41:16,212 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 11:41:16,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-26 11:41:16,406 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:16,407 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:16,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1651254496, now seen corresponding path program 5 times [2023-08-26 11:41:16,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:16,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851025896] [2023-08-26 11:41:16,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:16,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:16,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:16,534 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 11:41:16,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:16,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851025896] [2023-08-26 11:41:16,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851025896] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 11:41:16,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801572966] [2023-08-26 11:41:16,534 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 11:41:16,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:41:16,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:41:16,536 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 11:41:16,539 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 11:41:16,604 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-08-26 11:41:16,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 11:41:16,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-26 11:41:16,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 11:41:16,650 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 11:41:16,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 11:41:16,801 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 11:41:16,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801572966] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 11:41:16,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 11:41:16,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2023-08-26 11:41:16,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520010551] [2023-08-26 11:41:16,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 11:41:16,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 11:41:16,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:16,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 11:41:16,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-08-26 11:41:16,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 11:41:16,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 55 transitions, 691 flow. Second operand has 16 states, 16 states have (on average 61.75) internal successors, (988), 16 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:16,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:16,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 11:41:16,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:17,098 INFO L124 PetriNetUnfolderBase]: 254/455 cut-off events. [2023-08-26 11:41:17,099 INFO L125 PetriNetUnfolderBase]: For 4621/4621 co-relation queries the response was YES. [2023-08-26 11:41:17,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2438 conditions, 455 events. 254/455 cut-off events. For 4621/4621 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1589 event pairs, 55 based on Foata normal form. 32/487 useless extension candidates. Maximal degree in co-relation 2411. Up to 249 conditions per place. [2023-08-26 11:41:17,102 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 65 selfloop transitions, 25 changer transitions 27/117 dead transitions. [2023-08-26 11:41:17,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 117 transitions, 1457 flow [2023-08-26 11:41:17,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-26 11:41:17,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-26 11:41:17,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1043 transitions. [2023-08-26 11:41:17,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41520700636942676 [2023-08-26 11:41:17,105 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1043 transitions. [2023-08-26 11:41:17,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1043 transitions. [2023-08-26 11:41:17,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:17,106 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1043 transitions. [2023-08-26 11:41:17,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 65.1875) internal successors, (1043), 16 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:17,112 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 157.0) internal successors, (2669), 17 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:17,112 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 157.0) internal successors, (2669), 17 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:17,113 INFO L175 Difference]: Start difference. First operand has 72 places, 55 transitions, 691 flow. Second operand 16 states and 1043 transitions. [2023-08-26 11:41:17,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 117 transitions, 1457 flow [2023-08-26 11:41:17,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 117 transitions, 1096 flow, removed 167 selfloop flow, removed 5 redundant places. [2023-08-26 11:41:17,145 INFO L231 Difference]: Finished difference. Result has 92 places, 69 transitions, 764 flow [2023-08-26 11:41:17,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=764, PETRI_PLACES=92, PETRI_TRANSITIONS=69} [2023-08-26 11:41:17,146 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 70 predicate places. [2023-08-26 11:41:17,146 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 69 transitions, 764 flow [2023-08-26 11:41:17,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 61.75) internal successors, (988), 16 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:17,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:17,147 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:41:17,155 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 11:41:17,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-26 11:41:17,355 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:17,355 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:17,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1714670042, now seen corresponding path program 6 times [2023-08-26 11:41:17,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:17,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277072941] [2023-08-26 11:41:17,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:17,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:17,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:17,496 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 11:41:17,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:17,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277072941] [2023-08-26 11:41:17,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277072941] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 11:41:17,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130637704] [2023-08-26 11:41:17,497 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-26 11:41:17,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:41:17,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:41:17,498 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 11:41:17,520 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 11:41:17,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-08-26 11:41:17,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 11:41:17,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-26 11:41:17,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 11:41:17,621 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 11:41:17,621 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 11:41:17,758 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 11:41:17,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130637704] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 11:41:17,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 11:41:17,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-26 11:41:17,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37232406] [2023-08-26 11:41:17,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 11:41:17,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-26 11:41:17,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:17,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-26 11:41:17,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2023-08-26 11:41:17,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 11:41:17,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 69 transitions, 764 flow. Second operand has 17 states, 17 states have (on average 61.76470588235294) internal successors, (1050), 17 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:17,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:17,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 11:41:17,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:18,283 INFO L124 PetriNetUnfolderBase]: 408/747 cut-off events. [2023-08-26 11:41:18,283 INFO L125 PetriNetUnfolderBase]: For 12685/12685 co-relation queries the response was YES. [2023-08-26 11:41:18,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4034 conditions, 747 events. 408/747 cut-off events. For 12685/12685 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3284 event pairs, 44 based on Foata normal form. 32/779 useless extension candidates. Maximal degree in co-relation 3998. Up to 227 conditions per place. [2023-08-26 11:41:18,288 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 73 selfloop transitions, 71 changer transitions 37/181 dead transitions. [2023-08-26 11:41:18,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 181 transitions, 2080 flow [2023-08-26 11:41:18,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-26 11:41:18,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-26 11:41:18,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1434 transitions. [2023-08-26 11:41:18,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4151708164447018 [2023-08-26 11:41:18,293 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1434 transitions. [2023-08-26 11:41:18,293 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1434 transitions. [2023-08-26 11:41:18,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:18,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1434 transitions. [2023-08-26 11:41:18,296 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 65.18181818181819) internal successors, (1434), 22 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:18,301 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 157.0) internal successors, (3611), 23 states have internal predecessors, (3611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:18,302 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 157.0) internal successors, (3611), 23 states have internal predecessors, (3611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:18,302 INFO L175 Difference]: Start difference. First operand has 92 places, 69 transitions, 764 flow. Second operand 22 states and 1434 transitions. [2023-08-26 11:41:18,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 181 transitions, 2080 flow [2023-08-26 11:41:18,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 181 transitions, 1988 flow, removed 38 selfloop flow, removed 4 redundant places. [2023-08-26 11:41:18,327 INFO L231 Difference]: Finished difference. Result has 123 places, 107 transitions, 1491 flow [2023-08-26 11:41:18,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1491, PETRI_PLACES=123, PETRI_TRANSITIONS=107} [2023-08-26 11:41:18,327 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 101 predicate places. [2023-08-26 11:41:18,328 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 107 transitions, 1491 flow [2023-08-26 11:41:18,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 61.76470588235294) internal successors, (1050), 17 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:18,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:18,328 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:41:18,334 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 11:41:18,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:41:18,534 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:18,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:18,534 INFO L85 PathProgramCache]: Analyzing trace with hash -2039594720, now seen corresponding path program 7 times [2023-08-26 11:41:18,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:18,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453564353] [2023-08-26 11:41:18,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:18,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:18,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:18,633 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 11:41:18,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:18,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453564353] [2023-08-26 11:41:18,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453564353] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 11:41:18,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850178652] [2023-08-26 11:41:18,634 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-26 11:41:18,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:41:18,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:41:18,635 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 11:41:18,637 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 11:41:18,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:18,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2023-08-26 11:41:18,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 11:41:18,739 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 11:41:18,739 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 11:41:18,835 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 11:41:18,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850178652] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 11:41:18,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 11:41:18,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-26 11:41:18,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424060806] [2023-08-26 11:41:18,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 11:41:18,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-26 11:41:18,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:18,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-26 11:41:18,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2023-08-26 11:41:18,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 11:41:18,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 107 transitions, 1491 flow. Second operand has 17 states, 17 states have (on average 61.76470588235294) internal successors, (1050), 17 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:18,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:18,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 11:41:18,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:19,518 INFO L124 PetriNetUnfolderBase]: 572/1027 cut-off events. [2023-08-26 11:41:19,519 INFO L125 PetriNetUnfolderBase]: For 34541/34541 co-relation queries the response was YES. [2023-08-26 11:41:19,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7293 conditions, 1027 events. 572/1027 cut-off events. For 34541/34541 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4757 event pairs, 20 based on Foata normal form. 32/1059 useless extension candidates. Maximal degree in co-relation 7242. Up to 327 conditions per place. [2023-08-26 11:41:19,581 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 61 selfloop transitions, 127 changer transitions 48/236 dead transitions. [2023-08-26 11:41:19,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 236 transitions, 3639 flow [2023-08-26 11:41:19,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-26 11:41:19,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-26 11:41:19,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1760 transitions. [2023-08-26 11:41:19,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4151922623260203 [2023-08-26 11:41:19,586 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1760 transitions. [2023-08-26 11:41:19,586 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1760 transitions. [2023-08-26 11:41:19,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:19,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1760 transitions. [2023-08-26 11:41:19,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 65.18518518518519) internal successors, (1760), 27 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:19,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 157.0) internal successors, (4396), 28 states have internal predecessors, (4396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:19,597 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 157.0) internal successors, (4396), 28 states have internal predecessors, (4396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:19,597 INFO L175 Difference]: Start difference. First operand has 123 places, 107 transitions, 1491 flow. Second operand 27 states and 1760 transitions. [2023-08-26 11:41:19,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 236 transitions, 3639 flow [2023-08-26 11:41:19,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 236 transitions, 3315 flow, removed 148 selfloop flow, removed 7 redundant places. [2023-08-26 11:41:19,667 INFO L231 Difference]: Finished difference. Result has 157 places, 149 transitions, 2482 flow [2023-08-26 11:41:19,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=1243, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2482, PETRI_PLACES=157, PETRI_TRANSITIONS=149} [2023-08-26 11:41:19,668 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 135 predicate places. [2023-08-26 11:41:19,669 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 149 transitions, 2482 flow [2023-08-26 11:41:19,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 61.76470588235294) internal successors, (1050), 17 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:19,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:19,669 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:41:19,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-26 11:41:19,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:41:19,877 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:19,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:19,878 INFO L85 PathProgramCache]: Analyzing trace with hash 531927744, now seen corresponding path program 8 times [2023-08-26 11:41:19,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:19,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792482399] [2023-08-26 11:41:19,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:19,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:19,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 11:41:20,067 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:20,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 11:41:20,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792482399] [2023-08-26 11:41:20,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792482399] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 11:41:20,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308626772] [2023-08-26 11:41:20,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 11:41:20,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 11:41:20,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 11:41:20,069 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 11:41:20,071 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 11:41:20,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 11:41:20,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 11:41:20,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 15 conjunts are in the unsatisfiable core [2023-08-26 11:41:20,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 11:41:20,202 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:20,202 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 11:41:20,305 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 11:41:20,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308626772] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 11:41:20,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 11:41:20,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 14 [2023-08-26 11:41:20,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078991631] [2023-08-26 11:41:20,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 11:41:20,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-26 11:41:20,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 11:41:20,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-26 11:41:20,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2023-08-26 11:41:20,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 157 [2023-08-26 11:41:20,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 149 transitions, 2482 flow. Second operand has 16 states, 16 states have (on average 61.375) internal successors, (982), 16 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:20,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 11:41:20,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 157 [2023-08-26 11:41:20,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 11:41:20,808 INFO L124 PetriNetUnfolderBase]: 624/1115 cut-off events. [2023-08-26 11:41:20,808 INFO L125 PetriNetUnfolderBase]: For 48980/48980 co-relation queries the response was YES. [2023-08-26 11:41:20,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9638 conditions, 1115 events. 624/1115 cut-off events. For 48980/48980 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5178 event pairs, 40 based on Foata normal form. 4/1119 useless extension candidates. Maximal degree in co-relation 9572. Up to 350 conditions per place. [2023-08-26 11:41:20,820 INFO L140 encePairwiseOnDemand]: 152/157 looper letters, 65 selfloop transitions, 123 changer transitions 34/222 dead transitions. [2023-08-26 11:41:20,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 222 transitions, 4244 flow [2023-08-26 11:41:20,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-08-26 11:41:20,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2023-08-26 11:41:20,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1298 transitions. [2023-08-26 11:41:20,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41337579617834397 [2023-08-26 11:41:20,823 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1298 transitions. [2023-08-26 11:41:20,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1298 transitions. [2023-08-26 11:41:20,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 11:41:20,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1298 transitions. [2023-08-26 11:41:20,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 64.9) internal successors, (1298), 20 states have internal predecessors, (1298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:20,828 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 157.0) internal successors, (3297), 21 states have internal predecessors, (3297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:20,829 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 157.0) internal successors, (3297), 21 states have internal predecessors, (3297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:20,829 INFO L175 Difference]: Start difference. First operand has 157 places, 149 transitions, 2482 flow. Second operand 20 states and 1298 transitions. [2023-08-26 11:41:20,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 222 transitions, 4244 flow [2023-08-26 11:41:20,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 222 transitions, 3260 flow, removed 469 selfloop flow, removed 10 redundant places. [2023-08-26 11:41:20,995 INFO L231 Difference]: Finished difference. Result has 174 places, 165 transitions, 2518 flow [2023-08-26 11:41:20,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=157, PETRI_DIFFERENCE_MINUEND_FLOW=1914, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=2518, PETRI_PLACES=174, PETRI_TRANSITIONS=165} [2023-08-26 11:41:20,996 INFO L281 CegarLoopForPetriNet]: 22 programPoint places, 152 predicate places. [2023-08-26 11:41:20,996 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 165 transitions, 2518 flow [2023-08-26 11:41:20,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 61.375) internal successors, (982), 16 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 11:41:20,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 11:41:20,997 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 11:41:21,005 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 11:41:21,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-26 11:41:21,205 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-08-26 11:41:21,206 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 11:41:21,206 INFO L85 PathProgramCache]: Analyzing trace with hash -108773323, now seen corresponding path program 9 times [2023-08-26 11:41:21,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 11:41:21,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794366041] [2023-08-26 11:41:21,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 11:41:21,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 11:41:21,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:41:21,225 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 11:41:21,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 11:41:21,255 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 11:41:21,255 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 11:41:21,256 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONASSERT (6 of 7 remaining) [2023-08-26 11:41:21,258 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-08-26 11:41:21,258 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-08-26 11:41:21,259 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-08-26 11:41:21,259 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-08-26 11:41:21,259 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 7 remaining) [2023-08-26 11:41:21,259 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 7 remaining) [2023-08-26 11:41:21,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 11:41:21,259 INFO L445 BasicCegarLoop]: Path program histogram: [9, 2, 1, 1, 1, 1] [2023-08-26 11:41:21,265 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 11:41:21,265 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 11:41:21,320 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 11:41:21 BasicIcfg [2023-08-26 11:41:21,320 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 11:41:21,320 INFO L158 Benchmark]: Toolchain (without parser) took 11092.16ms. Allocated memory was 364.9MB in the beginning and 637.5MB in the end (delta: 272.6MB). Free memory was 340.0MB in the beginning and 358.4MB in the end (delta: -18.4MB). Peak memory consumption was 255.9MB. Max. memory is 16.0GB. [2023-08-26 11:41:21,320 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 364.9MB. Free memory was 342.0MB in the beginning and 341.9MB in the end (delta: 115.8kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 11:41:21,321 INFO L158 Benchmark]: CACSL2BoogieTranslator took 454.48ms. Allocated memory is still 364.9MB. Free memory was 339.4MB in the beginning and 320.5MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-26 11:41:21,321 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.02ms. Allocated memory is still 364.9MB. Free memory was 320.5MB in the beginning and 318.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 11:41:21,321 INFO L158 Benchmark]: Boogie Preprocessor took 22.97ms. Allocated memory is still 364.9MB. Free memory was 318.4MB in the beginning and 316.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 11:41:21,321 INFO L158 Benchmark]: RCFGBuilder took 425.84ms. Allocated memory is still 364.9MB. Free memory was 316.9MB in the beginning and 303.1MB in the end (delta: 13.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-26 11:41:21,322 INFO L158 Benchmark]: TraceAbstraction took 10144.63ms. Allocated memory was 364.9MB in the beginning and 637.5MB in the end (delta: 272.6MB). Free memory was 302.2MB in the beginning and 358.4MB in the end (delta: -56.2MB). Peak memory consumption was 218.1MB. Max. memory is 16.0GB. [2023-08-26 11:41:21,323 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 364.9MB. Free memory was 342.0MB in the beginning and 341.9MB in the end (delta: 115.8kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 454.48ms. Allocated memory is still 364.9MB. Free memory was 339.4MB in the beginning and 320.5MB in the end (delta: 18.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 38.02ms. Allocated memory is still 364.9MB. Free memory was 320.5MB in the beginning and 318.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 22.97ms. Allocated memory is still 364.9MB. Free memory was 318.4MB in the beginning and 316.9MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 425.84ms. Allocated memory is still 364.9MB. Free memory was 316.9MB in the beginning and 303.1MB in the end (delta: 13.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 10144.63ms. Allocated memory was 364.9MB in the beginning and 637.5MB in the end (delta: 272.6MB). Free memory was 302.2MB in the beginning and 358.4MB in the end (delta: -56.2MB). Peak memory consumption was 218.1MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 245]: Unsoundness Warning unspecified type, defaulting to int C: short [245] - GenericResultAtLocation [Line: 245]: Unsoundness Warning unspecified type, defaulting to int C: short [245] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.1s, 75 PlacesBefore, 22 PlacesAfterwards, 74 TransitionsBefore, 18 TransitionsAfterwards, 1440 CoEnabledTransitionPairs, 6 FixpointIterations, 24 TrivialSequentialCompositions, 40 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 14 ConcurrentYvCompositions, 3 ChoiceCompositions, 81 TotalNumberOfCompositions, 1354 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1185, independent: 1156, independent conditional: 0, independent unconditional: 1156, dependent: 29, dependent conditional: 0, dependent unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 799, independent: 787, independent conditional: 0, independent unconditional: 787, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1185, independent: 369, independent conditional: 0, independent unconditional: 369, dependent: 17, dependent conditional: 0, dependent unconditional: 17, unknown: 799, unknown conditional: 0, unknown unconditional: 799] , Statistics on independence cache: Total cache size (in pairs): 19, Positive cache size: 16, Positive conditional cache size: 0, Positive unconditional cache size: 16, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 693]: assertion can be violated assertion can be violated We found a FailurePath: [L694] 0 int i = 3, j = 6; [L712] 0 pthread_t id1, id2; [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [\old(argc)=51, arg={0:0}, argc=51, argv={49:50}, argv={49:50}, i=3, id1={5:0}, id2={3:0}, j=6, pthread_create(&id1, ((void *)0), t1, ((void *)0))=-2] [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [\old(argc)=51, arg={0:0}, arg={0:0}, arg={0:0}, argc=51, argv={49:50}, argv={49:50}, i=3, id1={5:0}, id2={3:0}, j=6, k=0, pthread_create(&id2, ((void *)0), t2, ((void *)0))=-1] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L716] 0 int condI = i >= (2*5 +6); VAL [\old(argc)=51, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=51, argv={49:50}, argv={49:50}, condI=0, i=7, id1={5:0}, id2={3:0}, j=6, k=0, k=1] [L704] COND TRUE 2 k < 5 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L704] COND TRUE 2 k < 5 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L704] COND TRUE 2 k < 5 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=4] [L704] COND TRUE 2 k < 5 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L696] COND TRUE 1 k < 5 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=5] [L704] COND TRUE 2 k < 5 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L719] 0 int condJ = j >= (2*5 +6); [L721] COND TRUE 0 condI || condJ [L722] CALL 0 reach_error() [L693] COND FALSE 0 !(0) [L693] 0 __assert_fail ("0", "triangular-2.c", 8, __extension__ __PRETTY_FUNCTION__) VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 713]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 714]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 95 locations, 7 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 10.0s, OverallIterations: 15, TraceHistogramMax: 5, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 3.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 910 SdHoareTripleChecker+Valid, 1.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 910 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 102 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1389 IncrementalHoareTripleChecker+Invalid, 1491 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 102 mSolverCounterUnsat, 0 mSDtfsCounter, 1389 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 285 GetRequests, 90 SyntacticMatches, 9 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2518occurred in iteration=14, InterpolantAutomatonStates: 146, 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: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 217 NumberOfCodeBlocks, 217 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 245 ConstructedInterpolants, 0 QuantifiedInterpolants, 1059 SizeOfPredicates, 27 NumberOfNonLiveVariables, 720 ConjunctsInSsa, 57 ConjunctsInUnsatCore, 24 InterpolantComputations, 9 PerfectInterpolantSequences, 9/114 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 proved your program to be incorrect! [2023-08-26 11:41:21,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...