/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/goblint-regression/09-regions_17-arrayloop_nr.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 12:24:07,454 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 12:24:07,499 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 12:24:07,509 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 12:24:07,509 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 12:24:07,542 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 12:24:07,543 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 12:24:07,543 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 12:24:07,544 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 12:24:07,547 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 12:24:07,547 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 12:24:07,547 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 12:24:07,547 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 12:24:07,548 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 12:24:07,548 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 12:24:07,548 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 12:24:07,548 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 12:24:07,548 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 12:24:07,548 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 12:24:07,549 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 12:24:07,549 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 12:24:07,549 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 12:24:07,550 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 12:24:07,550 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 12:24:07,550 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 12:24:07,550 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 12:24:07,550 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 12:24:07,551 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:24:07,551 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 12:24:07,551 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 12:24:07,552 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 12:24:07,552 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 12:24:07,552 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 12:24:07,552 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 12:24:07,552 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 12:24:07,552 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 12:24:07,806 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 12:24:07,825 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 12:24:07,827 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 12:24:07,828 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 12:24:07,828 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 12:24:07,829 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/09-regions_17-arrayloop_nr.i [2023-08-26 12:24:08,885 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 12:24:09,083 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 12:24:09,084 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/09-regions_17-arrayloop_nr.i [2023-08-26 12:24:09,100 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/800e4adf0/771cbcd9f69b46e6bb0fad2136f9f1de/FLAG20e056c95 [2023-08-26 12:24:09,113 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/800e4adf0/771cbcd9f69b46e6bb0fad2136f9f1de [2023-08-26 12:24:09,117 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 12:24:09,118 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 12:24:09,120 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 12:24:09,120 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 12:24:09,122 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 12:24:09,123 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:24:09" (1/1) ... [2023-08-26 12:24:09,123 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@306b95b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:24:09, skipping insertion in model container [2023-08-26 12:24:09,124 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:24:09" (1/1) ... [2023-08-26 12:24:09,169 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 12:24:09,540 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:24:09,562 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 12:24:09,584 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 12:24:09,586 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 12:24:09,594 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [1044] [2023-08-26 12:24:09,608 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:24:09,682 INFO L206 MainTranslator]: Completed translation [2023-08-26 12:24:09,683 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:24:09 WrapperNode [2023-08-26 12:24:09,683 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 12:24:09,684 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 12:24:09,684 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 12:24:09,684 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 12:24:09,688 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:24:09" (1/1) ... [2023-08-26 12:24:09,714 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:24:09" (1/1) ... [2023-08-26 12:24:09,732 INFO L138 Inliner]: procedures = 368, calls = 28, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 120 [2023-08-26 12:24:09,732 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 12:24:09,733 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 12:24:09,733 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 12:24:09,733 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 12:24:09,741 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:24:09" (1/1) ... [2023-08-26 12:24:09,741 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:24:09" (1/1) ... [2023-08-26 12:24:09,752 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:24:09" (1/1) ... [2023-08-26 12:24:09,752 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:24:09" (1/1) ... [2023-08-26 12:24:09,766 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:24:09" (1/1) ... [2023-08-26 12:24:09,768 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:24:09" (1/1) ... [2023-08-26 12:24:09,769 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:24:09" (1/1) ... [2023-08-26 12:24:09,770 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:24:09" (1/1) ... [2023-08-26 12:24:09,772 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 12:24:09,773 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 12:24:09,773 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 12:24:09,773 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 12:24:09,774 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:24:09" (1/1) ... [2023-08-26 12:24:09,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:24:09,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:24:09,808 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 12:24:09,825 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 12:24:09,832 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 12:24:09,833 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-08-26 12:24:09,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 12:24:09,833 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 12:24:09,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 12:24:09,833 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 12:24:09,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-26 12:24:09,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 12:24:09,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-26 12:24:09,833 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-26 12:24:09,833 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-26 12:24:09,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 12:24:09,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 12:24:09,834 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 12:24:09,932 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 12:24:09,933 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 12:24:10,193 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 12:24:10,199 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 12:24:10,199 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-26 12:24:10,200 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:24:10 BoogieIcfgContainer [2023-08-26 12:24:10,200 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 12:24:10,202 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 12:24:10,202 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 12:24:10,204 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 12:24:10,204 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 12:24:09" (1/3) ... [2023-08-26 12:24:10,205 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b6c77b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:24:10, skipping insertion in model container [2023-08-26 12:24:10,205 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:24:09" (2/3) ... [2023-08-26 12:24:10,205 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b6c77b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:24:10, skipping insertion in model container [2023-08-26 12:24:10,205 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:24:10" (3/3) ... [2023-08-26 12:24:10,206 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_17-arrayloop_nr.i [2023-08-26 12:24:10,216 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 12:24:10,216 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2023-08-26 12:24:10,216 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 12:24:10,268 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 12:24:10,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 163 transitions, 331 flow [2023-08-26 12:24:10,362 INFO L124 PetriNetUnfolderBase]: 6/162 cut-off events. [2023-08-26 12:24:10,362 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:24:10,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 162 events. 6/162 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 388 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 115. Up to 2 conditions per place. [2023-08-26 12:24:10,368 INFO L82 GeneralOperation]: Start removeDead. Operand has 161 places, 163 transitions, 331 flow [2023-08-26 12:24:10,376 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 160 places, 162 transitions, 327 flow [2023-08-26 12:24:10,379 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:24:10,388 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 160 places, 162 transitions, 327 flow [2023-08-26 12:24:10,393 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 160 places, 162 transitions, 327 flow [2023-08-26 12:24:10,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 160 places, 162 transitions, 327 flow [2023-08-26 12:24:10,435 INFO L124 PetriNetUnfolderBase]: 6/162 cut-off events. [2023-08-26 12:24:10,435 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:24:10,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 162 events. 6/162 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 388 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 115. Up to 2 conditions per place. [2023-08-26 12:24:10,440 INFO L119 LiptonReduction]: Number of co-enabled transitions 6468 [2023-08-26 12:24:15,255 INFO L134 LiptonReduction]: Checked pairs total: 18325 [2023-08-26 12:24:15,255 INFO L136 LiptonReduction]: Total number of compositions: 128 [2023-08-26 12:24:15,293 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:24:15,298 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;@6e87a013, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:24:15,299 INFO L358 AbstractCegarLoop]: Starting to check reachability of 51 error locations. [2023-08-26 12:24:15,300 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:24:15,300 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-08-26 12:24:15,300 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:24:15,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:24:15,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:24:15,301 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 12:24:15,304 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:24:15,304 INFO L85 PathProgramCache]: Analyzing trace with hash 18086, now seen corresponding path program 1 times [2023-08-26 12:24:15,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:24:15,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627522569] [2023-08-26 12:24:15,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:24:15,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:24:15,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:24:15,424 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 12:24:15,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:24:15,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627522569] [2023-08-26 12:24:15,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627522569] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:24:15,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:24:15,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:24:15,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852663548] [2023-08-26 12:24:15,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:24:15,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:24:15,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:24:15,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:24:15,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:24:15,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 291 [2023-08-26 12:24:15,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 137 flow. Second operand has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:15,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:24:15,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 291 [2023-08-26 12:24:15,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:24:15,662 INFO L124 PetriNetUnfolderBase]: 614/1689 cut-off events. [2023-08-26 12:24:15,662 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:24:15,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2929 conditions, 1689 events. 614/1689 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 11019 event pairs, 288 based on Foata normal form. 0/999 useless extension candidates. Maximal degree in co-relation 2902. Up to 655 conditions per place. [2023-08-26 12:24:15,670 INFO L140 encePairwiseOnDemand]: 279/291 looper letters, 77 selfloop transitions, 4 changer transitions 0/100 dead transitions. [2023-08-26 12:24:15,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 100 transitions, 365 flow [2023-08-26 12:24:15,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:24:15,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:24:15,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 504 transitions. [2023-08-26 12:24:15,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5773195876288659 [2023-08-26 12:24:15,680 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 504 transitions. [2023-08-26 12:24:15,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 504 transitions. [2023-08-26 12:24:15,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:24:15,683 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 504 transitions. [2023-08-26 12:24:15,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.0) internal successors, (504), 3 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:15,688 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:15,689 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:15,690 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 137 flow. Second operand 3 states and 504 transitions. [2023-08-26 12:24:15,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 100 transitions, 365 flow [2023-08-26 12:24:15,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 100 transitions, 364 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:24:15,693 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 156 flow [2023-08-26 12:24:15,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2023-08-26 12:24:15,696 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -2 predicate places. [2023-08-26 12:24:15,697 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 156 flow [2023-08-26 12:24:15,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:15,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:24:15,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:24:15,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 12:24:15,697 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 12:24:15,698 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:24:15,698 INFO L85 PathProgramCache]: Analyzing trace with hash 18110, now seen corresponding path program 1 times [2023-08-26 12:24:15,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:24:15,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230941131] [2023-08-26 12:24:15,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:24:15,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:24:15,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:24:15,883 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 12:24:15,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:24:15,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230941131] [2023-08-26 12:24:15,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230941131] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:24:15,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:24:15,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:24:15,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067447731] [2023-08-26 12:24:15,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:24:15,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:24:15,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:24:15,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:24:15,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:24:15,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 291 [2023-08-26 12:24:15,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 156 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:15,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:24:15,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 291 [2023-08-26 12:24:15,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:24:16,089 INFO L124 PetriNetUnfolderBase]: 962/2125 cut-off events. [2023-08-26 12:24:16,089 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2023-08-26 12:24:16,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4168 conditions, 2125 events. 962/2125 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 12619 event pairs, 874 based on Foata normal form. 0/1201 useless extension candidates. Maximal degree in co-relation 4137. Up to 1889 conditions per place. [2023-08-26 12:24:16,096 INFO L140 encePairwiseOnDemand]: 285/291 looper letters, 72 selfloop transitions, 2 changer transitions 1/82 dead transitions. [2023-08-26 12:24:16,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 82 transitions, 340 flow [2023-08-26 12:24:16,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:24:16,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:24:16,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 398 transitions. [2023-08-26 12:24:16,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4558991981672394 [2023-08-26 12:24:16,101 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 398 transitions. [2023-08-26 12:24:16,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 398 transitions. [2023-08-26 12:24:16,101 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:24:16,101 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 398 transitions. [2023-08-26 12:24:16,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 132.66666666666666) internal successors, (398), 3 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 12:24:16,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:16,104 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:16,104 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 156 flow. Second operand 3 states and 398 transitions. [2023-08-26 12:24:16,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 82 transitions, 340 flow [2023-08-26 12:24:16,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 82 transitions, 336 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:24:16,108 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 154 flow [2023-08-26 12:24:16,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2023-08-26 12:24:16,109 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -3 predicate places. [2023-08-26 12:24:16,111 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 154 flow [2023-08-26 12:24:16,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:16,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:24:16,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:24:16,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 12:24:16,115 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 12:24:16,115 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:24:16,115 INFO L85 PathProgramCache]: Analyzing trace with hash 18111, now seen corresponding path program 1 times [2023-08-26 12:24:16,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:24:16,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731797665] [2023-08-26 12:24:16,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:24:16,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:24:16,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:24:16,249 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 12:24:16,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:24:16,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731797665] [2023-08-26 12:24:16,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731797665] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:24:16,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:24:16,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:24:16,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343376118] [2023-08-26 12:24:16,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:24:16,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:24:16,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:24:16,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:24:16,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:24:16,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 291 [2023-08-26 12:24:16,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:16,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:24:16,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 291 [2023-08-26 12:24:16,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:24:16,490 INFO L124 PetriNetUnfolderBase]: 962/2122 cut-off events. [2023-08-26 12:24:16,491 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 12:24:16,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4186 conditions, 2122 events. 962/2122 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 12665 event pairs, 893 based on Foata normal form. 1/1200 useless extension candidates. Maximal degree in co-relation 4156. Up to 1929 conditions per place. [2023-08-26 12:24:16,498 INFO L140 encePairwiseOnDemand]: 288/291 looper letters, 53 selfloop transitions, 2 changer transitions 0/62 dead transitions. [2023-08-26 12:24:16,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 62 transitions, 264 flow [2023-08-26 12:24:16,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:24:16,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:24:16,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 334 transitions. [2023-08-26 12:24:16,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38258877434135163 [2023-08-26 12:24:16,514 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 334 transitions. [2023-08-26 12:24:16,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 334 transitions. [2023-08-26 12:24:16,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:24:16,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 334 transitions. [2023-08-26 12:24:16,515 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:16,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:16,516 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:16,516 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 154 flow. Second operand 3 states and 334 transitions. [2023-08-26 12:24:16,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 62 transitions, 264 flow [2023-08-26 12:24:16,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 62 transitions, 260 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:24:16,518 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 158 flow [2023-08-26 12:24:16,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2023-08-26 12:24:16,519 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, -2 predicate places. [2023-08-26 12:24:16,519 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 158 flow [2023-08-26 12:24:16,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:16,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:24:16,520 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 12:24:16,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 12:24:16,520 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 12:24:16,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:24:16,520 INFO L85 PathProgramCache]: Analyzing trace with hash 562006, now seen corresponding path program 1 times [2023-08-26 12:24:16,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:24:16,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198439624] [2023-08-26 12:24:16,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:24:16,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:24:16,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:24:16,674 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 12:24:16,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:24:16,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198439624] [2023-08-26 12:24:16,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198439624] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:24:16,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161364669] [2023-08-26 12:24:16,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:24:16,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:24:16,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:24:16,677 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 12:24:16,717 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 12:24:16,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:24:16,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 26 conjunts are in the unsatisfiable core [2023-08-26 12:24:16,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:24:16,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:24:16,859 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 12:24:16,876 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-26 12:24:16,876 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-26 12:24:16,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:24:16,906 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 12:24:16,919 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 12:24:16,919 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:24:21,027 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 12:24:21,028 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 64 [2023-08-26 12:24:23,191 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 12:24:23,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161364669] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:24:23,192 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:24:23,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-26 12:24:23,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546246653] [2023-08-26 12:24:23,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:24:23,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 12:24:23,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:24:23,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 12:24:23,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-26 12:24:23,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 291 [2023-08-26 12:24:23,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 158 flow. Second operand has 8 states, 8 states have (on average 76.125) internal successors, (609), 8 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:23,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:24:23,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 291 [2023-08-26 12:24:23,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:24:23,925 INFO L124 PetriNetUnfolderBase]: 1324/2660 cut-off events. [2023-08-26 12:24:23,925 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2023-08-26 12:24:23,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5506 conditions, 2660 events. 1324/2660 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 15960 event pairs, 42 based on Foata normal form. 3/1230 useless extension candidates. Maximal degree in co-relation 5491. Up to 1523 conditions per place. [2023-08-26 12:24:23,935 INFO L140 encePairwiseOnDemand]: 281/291 looper letters, 108 selfloop transitions, 11 changer transitions 0/119 dead transitions. [2023-08-26 12:24:23,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 119 transitions, 536 flow [2023-08-26 12:24:23,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 12:24:23,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 12:24:23,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 574 transitions. [2023-08-26 12:24:23,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32875143184421535 [2023-08-26 12:24:23,937 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 574 transitions. [2023-08-26 12:24:23,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 574 transitions. [2023-08-26 12:24:23,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:24:23,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 574 transitions. [2023-08-26 12:24:23,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 95.66666666666667) internal successors, (574), 6 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:23,940 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 291.0) internal successors, (2037), 7 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:23,941 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 291.0) internal successors, (2037), 7 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:23,941 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 158 flow. Second operand 6 states and 574 transitions. [2023-08-26 12:24:23,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 119 transitions, 536 flow [2023-08-26 12:24:23,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 119 transitions, 532 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-26 12:24:23,943 INFO L231 Difference]: Finished difference. Result has 73 places, 67 transitions, 225 flow [2023-08-26 12:24:23,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=225, PETRI_PLACES=73, PETRI_TRANSITIONS=67} [2023-08-26 12:24:23,944 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 5 predicate places. [2023-08-26 12:24:23,944 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 67 transitions, 225 flow [2023-08-26 12:24:23,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 76.125) internal successors, (609), 8 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:23,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:24:23,944 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2023-08-26 12:24:23,961 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-26 12:24:24,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:24:24,149 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 12:24:24,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:24:24,150 INFO L85 PathProgramCache]: Analyzing trace with hash 17422726, now seen corresponding path program 1 times [2023-08-26 12:24:24,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:24:24,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272532168] [2023-08-26 12:24:24,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:24:24,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:24:24,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:24:24,194 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:24:24,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:24:24,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272532168] [2023-08-26 12:24:24,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272532168] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:24:24,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45413250] [2023-08-26 12:24:24,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:24:24,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:24:24,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:24:24,214 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 12:24:24,215 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 12:24:24,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:24:24,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 12:24:24,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:24:24,310 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:24:24,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:24:24,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:24:24,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45413250] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:24:24,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:24:24,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-26 12:24:24,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578325826] [2023-08-26 12:24:24,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:24:24,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 12:24:24,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:24:24,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 12:24:24,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-08-26 12:24:24,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 291 [2023-08-26 12:24:24,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 67 transitions, 225 flow. Second operand has 8 states, 8 states have (on average 138.0) internal successors, (1104), 8 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:24,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:24:24,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 291 [2023-08-26 12:24:24,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:24:24,959 INFO L124 PetriNetUnfolderBase]: 1788/4718 cut-off events. [2023-08-26 12:24:24,959 INFO L125 PetriNetUnfolderBase]: For 591/591 co-relation queries the response was YES. [2023-08-26 12:24:24,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9033 conditions, 4718 events. 1788/4718 cut-off events. For 591/591 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 29768 event pairs, 32 based on Foata normal form. 89/3046 useless extension candidates. Maximal degree in co-relation 8997. Up to 598 conditions per place. [2023-08-26 12:24:24,979 INFO L140 encePairwiseOnDemand]: 281/291 looper letters, 223 selfloop transitions, 16 changer transitions 0/256 dead transitions. [2023-08-26 12:24:24,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 256 transitions, 1150 flow [2023-08-26 12:24:24,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 12:24:24,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 12:24:24,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1352 transitions. [2023-08-26 12:24:24,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5807560137457045 [2023-08-26 12:24:24,981 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1352 transitions. [2023-08-26 12:24:24,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1352 transitions. [2023-08-26 12:24:24,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:24:24,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1352 transitions. [2023-08-26 12:24:24,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 169.0) internal successors, (1352), 8 states have internal predecessors, (1352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:24,987 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 291.0) internal successors, (2619), 9 states have internal predecessors, (2619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:24,987 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 291.0) internal successors, (2619), 9 states have internal predecessors, (2619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:24,987 INFO L175 Difference]: Start difference. First operand has 73 places, 67 transitions, 225 flow. Second operand 8 states and 1352 transitions. [2023-08-26 12:24:24,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 256 transitions, 1150 flow [2023-08-26 12:24:24,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 256 transitions, 1142 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-26 12:24:24,995 INFO L231 Difference]: Finished difference. Result has 85 places, 73 transitions, 355 flow [2023-08-26 12:24:24,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=355, PETRI_PLACES=85, PETRI_TRANSITIONS=73} [2023-08-26 12:24:24,997 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 17 predicate places. [2023-08-26 12:24:24,997 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 73 transitions, 355 flow [2023-08-26 12:24:24,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 138.0) internal successors, (1104), 8 states have internal predecessors, (1104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:24,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:24:24,998 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2023-08-26 12:24:25,003 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 12:24:25,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:24:25,203 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 12:24:25,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:24:25,203 INFO L85 PathProgramCache]: Analyzing trace with hash -436587393, now seen corresponding path program 2 times [2023-08-26 12:24:25,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:24:25,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027623395] [2023-08-26 12:24:25,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:24:25,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:24:25,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:24:25,677 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:24:25,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:24:25,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027623395] [2023-08-26 12:24:25,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027623395] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:24:25,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396519886] [2023-08-26 12:24:25,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 12:24:25,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:24:25,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:24:25,678 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 12:24:25,685 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 12:24:25,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 12:24:25,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 12:24:25,801 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-26 12:24:25,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:24:25,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:24:25,812 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 12:24:25,824 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-08-26 12:24:25,824 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-08-26 12:24:25,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:24:25,843 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 12:24:25,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:24:25,868 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 12:24:25,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:24:25,909 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 12:24:25,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:24:25,936 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 12:24:25,954 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:24:25,954 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:24:28,007 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 12:24:28,007 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 64 [2023-08-26 12:24:30,089 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 12:24:30,090 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 70 [2023-08-26 12:24:34,246 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 12:24:34,246 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 76 [2023-08-26 12:24:34,440 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 12:24:34,440 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 82 [2023-08-26 12:24:38,545 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:24:38,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396519886] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:24:38,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:24:38,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-08-26 12:24:38,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845744595] [2023-08-26 12:24:38,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:24:38,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-26 12:24:38,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:24:38,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-26 12:24:38,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2023-08-26 12:24:38,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 291 [2023-08-26 12:24:38,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 73 transitions, 355 flow. Second operand has 17 states, 17 states have (on average 77.05882352941177) internal successors, (1310), 17 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:38,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:24:38,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 291 [2023-08-26 12:24:38,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:24:41,248 INFO L124 PetriNetUnfolderBase]: 3856/7734 cut-off events. [2023-08-26 12:24:41,248 INFO L125 PetriNetUnfolderBase]: For 1624/1624 co-relation queries the response was YES. [2023-08-26 12:24:41,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17327 conditions, 7734 events. 3856/7734 cut-off events. For 1624/1624 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 47282 event pairs, 0 based on Foata normal form. 6/3782 useless extension candidates. Maximal degree in co-relation 17293. Up to 4515 conditions per place. [2023-08-26 12:24:41,268 INFO L140 encePairwiseOnDemand]: 284/291 looper letters, 183 selfloop transitions, 23 changer transitions 0/206 dead transitions. [2023-08-26 12:24:41,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 206 transitions, 1219 flow [2023-08-26 12:24:41,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 12:24:41,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 12:24:41,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1118 transitions. [2023-08-26 12:24:41,271 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3201603665521191 [2023-08-26 12:24:41,271 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1118 transitions. [2023-08-26 12:24:41,271 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1118 transitions. [2023-08-26 12:24:41,272 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:24:41,272 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1118 transitions. [2023-08-26 12:24:41,273 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 93.16666666666667) internal successors, (1118), 12 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:41,276 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 291.0) internal successors, (3783), 13 states have internal predecessors, (3783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:41,277 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 291.0) internal successors, (3783), 13 states have internal predecessors, (3783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:41,277 INFO L175 Difference]: Start difference. First operand has 85 places, 73 transitions, 355 flow. Second operand 12 states and 1118 transitions. [2023-08-26 12:24:41,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 206 transitions, 1219 flow [2023-08-26 12:24:41,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 206 transitions, 1162 flow, removed 17 selfloop flow, removed 4 redundant places. [2023-08-26 12:24:41,288 INFO L231 Difference]: Finished difference. Result has 96 places, 80 transitions, 424 flow [2023-08-26 12:24:41,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=424, PETRI_PLACES=96, PETRI_TRANSITIONS=80} [2023-08-26 12:24:41,289 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 28 predicate places. [2023-08-26 12:24:41,289 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 80 transitions, 424 flow [2023-08-26 12:24:41,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 77.05882352941177) internal successors, (1310), 17 states have internal predecessors, (1310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:41,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:24:41,289 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 1, 1] [2023-08-26 12:24:41,296 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 12:24:41,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:24:41,494 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 12:24:41,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:24:41,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1346328390, now seen corresponding path program 2 times [2023-08-26 12:24:41,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:24:41,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946700006] [2023-08-26 12:24:41,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:24:41,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:24:41,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:24:41,621 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:24:41,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:24:41,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946700006] [2023-08-26 12:24:41,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946700006] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:24:41,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106014421] [2023-08-26 12:24:41,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 12:24:41,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:24:41,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:24:41,622 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 12:24:41,624 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 12:24:41,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 12:24:41,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 12:24:41,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-26 12:24:41,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:24:41,775 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:24:41,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:24:41,816 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:24:41,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106014421] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:24:41,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:24:41,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2023-08-26 12:24:41,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222065458] [2023-08-26 12:24:41,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:24:41,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-26 12:24:41,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:24:41,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-26 12:24:41,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-08-26 12:24:41,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 291 [2023-08-26 12:24:41,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 80 transitions, 424 flow. Second operand has 12 states, 12 states have (on average 138.08333333333334) internal successors, (1657), 12 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:41,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:24:41,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 291 [2023-08-26 12:24:41,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:24:42,795 INFO L124 PetriNetUnfolderBase]: 2943/7780 cut-off events. [2023-08-26 12:24:42,795 INFO L125 PetriNetUnfolderBase]: For 3617/3617 co-relation queries the response was YES. [2023-08-26 12:24:42,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15912 conditions, 7780 events. 2943/7780 cut-off events. For 3617/3617 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 49250 event pairs, 32 based on Foata normal form. 72/4935 useless extension candidates. Maximal degree in co-relation 15839. Up to 597 conditions per place. [2023-08-26 12:24:42,823 INFO L140 encePairwiseOnDemand]: 281/291 looper letters, 353 selfloop transitions, 24 changer transitions 0/394 dead transitions. [2023-08-26 12:24:42,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 394 transitions, 1930 flow [2023-08-26 12:24:42,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 12:24:42,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 12:24:42,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2037 transitions. [2023-08-26 12:24:42,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2023-08-26 12:24:42,832 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2037 transitions. [2023-08-26 12:24:42,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2037 transitions. [2023-08-26 12:24:42,835 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:24:42,835 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2037 transitions. [2023-08-26 12:24:42,840 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 169.75) internal successors, (2037), 12 states have internal predecessors, (2037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:42,847 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 291.0) internal successors, (3783), 13 states have internal predecessors, (3783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:42,848 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 291.0) internal successors, (3783), 13 states have internal predecessors, (3783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:42,848 INFO L175 Difference]: Start difference. First operand has 96 places, 80 transitions, 424 flow. Second operand 12 states and 2037 transitions. [2023-08-26 12:24:42,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 394 transitions, 1930 flow [2023-08-26 12:24:42,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 394 transitions, 1854 flow, removed 14 selfloop flow, removed 4 redundant places. [2023-08-26 12:24:42,859 INFO L231 Difference]: Finished difference. Result has 108 places, 81 transitions, 495 flow [2023-08-26 12:24:42,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=343, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=495, PETRI_PLACES=108, PETRI_TRANSITIONS=81} [2023-08-26 12:24:42,860 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 40 predicate places. [2023-08-26 12:24:42,860 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 81 transitions, 495 flow [2023-08-26 12:24:42,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 138.08333333333334) internal successors, (1657), 12 states have internal predecessors, (1657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:42,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:24:42,861 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-26 12:24:42,874 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 12:24:43,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:24:43,074 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 12:24:43,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:24:43,074 INFO L85 PathProgramCache]: Analyzing trace with hash -385878753, now seen corresponding path program 3 times [2023-08-26 12:24:43,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:24:43,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160689684] [2023-08-26 12:24:43,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:24:43,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:24:43,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:24:43,350 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 45 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:24:43,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:24:43,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160689684] [2023-08-26 12:24:43,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160689684] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:24:43,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381583824] [2023-08-26 12:24:43,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 12:24:43,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:24:43,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:24:43,366 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 12:24:43,367 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 12:24:52,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-26 12:24:52,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 12:24:52,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 12 conjunts are in the unsatisfiable core [2023-08-26 12:24:52,053 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:24:52,070 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:24:52,070 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 12:24:52,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381583824] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:24:52,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 12:24:52,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 12 [2023-08-26 12:24:52,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739064449] [2023-08-26 12:24:52,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:24:52,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 12:24:52,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:24:52,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 12:24:52,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2023-08-26 12:24:52,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 137 out of 291 [2023-08-26 12:24:52,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 81 transitions, 495 flow. Second operand has 13 states, 13 states have (on average 137.92307692307693) internal successors, (1793), 13 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:52,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:24:52,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 137 of 291 [2023-08-26 12:24:52,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:24:53,158 INFO L124 PetriNetUnfolderBase]: 2925/7761 cut-off events. [2023-08-26 12:24:53,158 INFO L125 PetriNetUnfolderBase]: For 3823/3823 co-relation queries the response was YES. [2023-08-26 12:24:53,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15897 conditions, 7761 events. 2925/7761 cut-off events. For 3823/3823 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 49385 event pairs, 32 based on Foata normal form. 19/4863 useless extension candidates. Maximal degree in co-relation 15829. Up to 579 conditions per place. [2023-08-26 12:24:53,181 INFO L140 encePairwiseOnDemand]: 285/291 looper letters, 352 selfloop transitions, 22 changer transitions 0/391 dead transitions. [2023-08-26 12:24:53,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 391 transitions, 1922 flow [2023-08-26 12:24:53,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-26 12:24:53,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-26 12:24:53,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2158 transitions. [2023-08-26 12:24:53,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.570446735395189 [2023-08-26 12:24:53,185 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2158 transitions. [2023-08-26 12:24:53,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2158 transitions. [2023-08-26 12:24:53,186 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:24:53,186 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2158 transitions. [2023-08-26 12:24:53,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 166.0) internal successors, (2158), 13 states have internal predecessors, (2158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:53,259 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 291.0) internal successors, (4074), 14 states have internal predecessors, (4074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:53,259 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 291.0) internal successors, (4074), 14 states have internal predecessors, (4074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:53,260 INFO L175 Difference]: Start difference. First operand has 108 places, 81 transitions, 495 flow. Second operand 13 states and 2158 transitions. [2023-08-26 12:24:53,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 391 transitions, 1922 flow [2023-08-26 12:24:53,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 391 transitions, 1836 flow, removed 1 selfloop flow, removed 11 redundant places. [2023-08-26 12:24:53,269 INFO L231 Difference]: Finished difference. Result has 108 places, 78 transitions, 442 flow [2023-08-26 12:24:53,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=442, PETRI_PLACES=108, PETRI_TRANSITIONS=78} [2023-08-26 12:24:53,271 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 40 predicate places. [2023-08-26 12:24:53,271 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 78 transitions, 442 flow [2023-08-26 12:24:53,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 137.92307692307693) internal successors, (1793), 13 states have internal predecessors, (1793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:24:53,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:24:53,272 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-26 12:24:53,288 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 12:24:53,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:24:53,484 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 12:24:53,484 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:24:53,484 INFO L85 PathProgramCache]: Analyzing trace with hash -385878778, now seen corresponding path program 3 times [2023-08-26 12:24:53,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:24:53,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439859868] [2023-08-26 12:24:53,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:24:53,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:24:53,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:24:54,036 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-08-26 12:24:54,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:24:54,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439859868] [2023-08-26 12:24:54,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439859868] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:24:54,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833711559] [2023-08-26 12:24:54,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 12:24:54,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:24:54,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:24:54,037 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 12:24:54,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-26 12:25:37,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-08-26 12:25:37,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 12:25:37,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 28 conjunts are in the unsatisfiable core [2023-08-26 12:25:37,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:25:37,717 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-26 12:25:37,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:25:37,726 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 12:25:37,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:25:37,734 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 12:25:37,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:25:37,745 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 12:25:37,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:25:37,769 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 12:25:37,780 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-26 12:25:37,780 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 12:25:37,795 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-26 12:25:37,795 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 12:25:37,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:25:37,804 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 12:25:37,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:25:37,810 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 12:25:37,819 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-08-26 12:25:37,819 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 12:25:37,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:25:37,832 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 12:25:37,834 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-26 12:25:37,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:25:38,070 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-26 12:25:38,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833711559] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:25:38,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:25:38,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 3 [2023-08-26 12:25:38,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556217511] [2023-08-26 12:25:38,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:25:38,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 12:25:38,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:25:38,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 12:25:38,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-26 12:25:38,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 291 [2023-08-26 12:25:38,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 78 transitions, 442 flow. Second operand has 5 states, 5 states have (on average 110.6) internal successors, (553), 5 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:25:38,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:25:38,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 291 [2023-08-26 12:25:38,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:25:39,091 INFO L124 PetriNetUnfolderBase]: 4029/9413 cut-off events. [2023-08-26 12:25:39,091 INFO L125 PetriNetUnfolderBase]: For 2710/2710 co-relation queries the response was YES. [2023-08-26 12:25:39,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19522 conditions, 9413 events. 4029/9413 cut-off events. For 2710/2710 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 59972 event pairs, 3798 based on Foata normal form. 0/5785 useless extension candidates. Maximal degree in co-relation 19418. Up to 8051 conditions per place. [2023-08-26 12:25:39,120 INFO L140 encePairwiseOnDemand]: 288/291 looper letters, 83 selfloop transitions, 2 changer transitions 1/96 dead transitions. [2023-08-26 12:25:39,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 96 transitions, 630 flow [2023-08-26 12:25:39,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:25:39,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:25:39,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 395 transitions. [2023-08-26 12:25:39,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4524627720504009 [2023-08-26 12:25:39,121 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 395 transitions. [2023-08-26 12:25:39,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 395 transitions. [2023-08-26 12:25:39,121 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:25:39,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 395 transitions. [2023-08-26 12:25:39,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:25:39,123 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:25:39,123 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:25:39,123 INFO L175 Difference]: Start difference. First operand has 108 places, 78 transitions, 442 flow. Second operand 3 states and 395 transitions. [2023-08-26 12:25:39,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 96 transitions, 630 flow [2023-08-26 12:25:39,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 96 transitions, 586 flow, removed 0 selfloop flow, removed 12 redundant places. [2023-08-26 12:25:39,131 INFO L231 Difference]: Finished difference. Result has 97 places, 77 transitions, 380 flow [2023-08-26 12:25:39,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=376, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=380, PETRI_PLACES=97, PETRI_TRANSITIONS=77} [2023-08-26 12:25:39,132 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 29 predicate places. [2023-08-26 12:25:39,133 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 77 transitions, 380 flow [2023-08-26 12:25:39,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 110.6) internal successors, (553), 5 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:25:39,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:25:39,133 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1] [2023-08-26 12:25:39,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-26 12:25:39,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:25:39,360 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 12:25:39,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:25:39,360 INFO L85 PathProgramCache]: Analyzing trace with hash -385878779, now seen corresponding path program 1 times [2023-08-26 12:25:39,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:25:39,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973412996] [2023-08-26 12:25:39,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:25:39,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:25:39,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:25:40,057 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-08-26 12:25:40,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:25:40,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973412996] [2023-08-26 12:25:40,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973412996] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:25:40,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811602636] [2023-08-26 12:25:40,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:25:40,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:25:40,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:25:40,059 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 12:25:40,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-26 12:25:40,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:25:40,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 30 conjunts are in the unsatisfiable core [2023-08-26 12:25:40,339 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:25:40,343 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-26 12:25:40,346 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-26 12:25:40,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:25:40,361 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 12:25:40,368 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-26 12:25:40,369 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-26 12:25:40,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:25:40,379 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 12:25:40,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:25:40,387 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 12:25:40,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:25:40,395 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 12:25:40,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:25:40,402 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 12:25:40,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:25:40,411 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 12:25:40,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:25:40,418 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 12:25:40,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:25:40,427 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 12:25:40,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:25:40,433 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 12:25:40,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:25:40,440 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 12:25:40,443 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-08-26 12:25:40,443 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:25:40,833 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-08-26 12:25:40,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811602636] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:25:40,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:25:40,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 3, 3] total 6 [2023-08-26 12:25:40,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035489091] [2023-08-26 12:25:40,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:25:40,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 12:25:40,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:25:40,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 12:25:40,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-26 12:25:40,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 291 [2023-08-26 12:25:40,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 77 transitions, 380 flow. Second operand has 8 states, 8 states have (on average 92.375) internal successors, (739), 8 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:25:40,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:25:40,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 291 [2023-08-26 12:25:40,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:25:41,910 INFO L124 PetriNetUnfolderBase]: 6205/12444 cut-off events. [2023-08-26 12:25:41,910 INFO L125 PetriNetUnfolderBase]: For 2370/2370 co-relation queries the response was YES. [2023-08-26 12:25:41,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26973 conditions, 12444 events. 6205/12444 cut-off events. For 2370/2370 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 75763 event pairs, 5901 based on Foata normal form. 0/5968 useless extension candidates. Maximal degree in co-relation 26891. Up to 12399 conditions per place. [2023-08-26 12:25:41,938 INFO L140 encePairwiseOnDemand]: 288/291 looper letters, 95 selfloop transitions, 2 changer transitions 1/98 dead transitions. [2023-08-26 12:25:41,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 98 transitions, 598 flow [2023-08-26 12:25:41,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:25:41,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:25:41,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 353 transitions. [2023-08-26 12:25:41,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4043528064146621 [2023-08-26 12:25:41,939 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 353 transitions. [2023-08-26 12:25:41,939 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 353 transitions. [2023-08-26 12:25:41,940 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:25:41,940 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 353 transitions. [2023-08-26 12:25:41,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:25:41,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:25:41,941 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:25:41,941 INFO L175 Difference]: Start difference. First operand has 97 places, 77 transitions, 380 flow. Second operand 3 states and 353 transitions. [2023-08-26 12:25:41,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 98 transitions, 598 flow [2023-08-26 12:25:41,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 98 transitions, 594 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:25:41,949 INFO L231 Difference]: Finished difference. Result has 96 places, 76 transitions, 358 flow [2023-08-26 12:25:41,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=358, PETRI_PLACES=96, PETRI_TRANSITIONS=76} [2023-08-26 12:25:41,950 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 28 predicate places. [2023-08-26 12:25:41,950 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 76 transitions, 358 flow [2023-08-26 12:25:41,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 92.375) internal successors, (739), 8 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:25:41,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:25:41,950 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:25:41,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-26 12:25:42,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:25:42,159 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 12:25:42,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:25:42,159 INFO L85 PathProgramCache]: Analyzing trace with hash 266734461, now seen corresponding path program 1 times [2023-08-26 12:25:42,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:25:42,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145671120] [2023-08-26 12:25:42,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:25:42,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:25:42,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:25:42,326 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 12:25:42,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:25:42,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145671120] [2023-08-26 12:25:42,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145671120] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:25:42,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:25:42,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:25:42,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268161131] [2023-08-26 12:25:42,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:25:42,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:25:42,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:25:42,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:25:42,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:25:42,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 291 [2023-08-26 12:25:42,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 76 transitions, 358 flow. Second operand has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:25:42,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:25:42,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 291 [2023-08-26 12:25:42,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:25:43,226 INFO L124 PetriNetUnfolderBase]: 4441/9720 cut-off events. [2023-08-26 12:25:43,227 INFO L125 PetriNetUnfolderBase]: For 2157/2157 co-relation queries the response was YES. [2023-08-26 12:25:43,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20534 conditions, 9720 events. 4441/9720 cut-off events. For 2157/2157 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 60283 event pairs, 4218 based on Foata normal form. 0/5890 useless extension candidates. Maximal degree in co-relation 20452. Up to 8912 conditions per place. [2023-08-26 12:25:43,257 INFO L140 encePairwiseOnDemand]: 288/291 looper letters, 66 selfloop transitions, 1 changer transitions 0/74 dead transitions. [2023-08-26 12:25:43,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 74 transitions, 488 flow [2023-08-26 12:25:43,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:25:43,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:25:43,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 366 transitions. [2023-08-26 12:25:43,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41924398625429554 [2023-08-26 12:25:43,258 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 366 transitions. [2023-08-26 12:25:43,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 366 transitions. [2023-08-26 12:25:43,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:25:43,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 366 transitions. [2023-08-26 12:25:43,259 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:25:43,260 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:25:43,260 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:25:43,260 INFO L175 Difference]: Start difference. First operand has 96 places, 76 transitions, 358 flow. Second operand 3 states and 366 transitions. [2023-08-26 12:25:43,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 74 transitions, 488 flow [2023-08-26 12:25:43,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 74 transitions, 484 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:25:43,268 INFO L231 Difference]: Finished difference. Result has 94 places, 74 transitions, 352 flow [2023-08-26 12:25:43,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=352, PETRI_PLACES=94, PETRI_TRANSITIONS=74} [2023-08-26 12:25:43,269 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 26 predicate places. [2023-08-26 12:25:43,269 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 74 transitions, 352 flow [2023-08-26 12:25:43,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.66666666666667) internal successors, (323), 3 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:25:43,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:25:43,269 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:25:43,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 12:25:43,269 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 12:25:43,270 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:25:43,270 INFO L85 PathProgramCache]: Analyzing trace with hash 266734460, now seen corresponding path program 1 times [2023-08-26 12:25:43,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:25:43,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825317448] [2023-08-26 12:25:43,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:25:43,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:25:43,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:25:43,556 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 12:25:43,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:25:43,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825317448] [2023-08-26 12:25:43,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825317448] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:25:43,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:25:43,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:25:43,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526307827] [2023-08-26 12:25:43,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:25:43,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:25:43,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:25:43,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:25:43,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:25:43,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 291 [2023-08-26 12:25:43,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 74 transitions, 352 flow. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:25:43,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:25:43,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 291 [2023-08-26 12:25:43,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:25:44,302 INFO L124 PetriNetUnfolderBase]: 3459/8085 cut-off events. [2023-08-26 12:25:44,303 INFO L125 PetriNetUnfolderBase]: For 1899/1899 co-relation queries the response was YES. [2023-08-26 12:25:44,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16822 conditions, 8085 events. 3459/8085 cut-off events. For 1899/1899 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 49921 event pairs, 3258 based on Foata normal form. 0/5298 useless extension candidates. Maximal degree in co-relation 16794. Up to 6909 conditions per place. [2023-08-26 12:25:44,324 INFO L140 encePairwiseOnDemand]: 287/291 looper letters, 79 selfloop transitions, 2 changer transitions 1/91 dead transitions. [2023-08-26 12:25:44,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 91 transitions, 550 flow [2023-08-26 12:25:44,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:25:44,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:25:44,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 375 transitions. [2023-08-26 12:25:44,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42955326460481097 [2023-08-26 12:25:44,326 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 375 transitions. [2023-08-26 12:25:44,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 375 transitions. [2023-08-26 12:25:44,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:25:44,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 375 transitions. [2023-08-26 12:25:44,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 125.0) internal successors, (375), 3 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:25:44,328 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:25:44,328 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:25:44,328 INFO L175 Difference]: Start difference. First operand has 94 places, 74 transitions, 352 flow. Second operand 3 states and 375 transitions. [2023-08-26 12:25:44,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 91 transitions, 550 flow [2023-08-26 12:25:44,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 91 transitions, 549 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:25:44,334 INFO L231 Difference]: Finished difference. Result has 93 places, 72 transitions, 351 flow [2023-08-26 12:25:44,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=351, PETRI_PLACES=93, PETRI_TRANSITIONS=72} [2023-08-26 12:25:44,335 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 25 predicate places. [2023-08-26 12:25:44,335 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 72 transitions, 351 flow [2023-08-26 12:25:44,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:25:44,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:25:44,335 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:25:44,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 12:25:44,335 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 12:25:44,335 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:25:44,336 INFO L85 PathProgramCache]: Analyzing trace with hash 266732231, now seen corresponding path program 1 times [2023-08-26 12:25:44,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:25:44,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102113367] [2023-08-26 12:25:44,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:25:44,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:25:44,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:25:44,430 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 12:25:44,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:25:44,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102113367] [2023-08-26 12:25:44,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102113367] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:25:44,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:25:44,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:25:44,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725888004] [2023-08-26 12:25:44,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:25:44,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:25:44,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:25:44,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:25:44,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:25:44,431 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 291 [2023-08-26 12:25:44,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 72 transitions, 351 flow. Second operand has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:25:44,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:25:44,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 291 [2023-08-26 12:25:44,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:25:45,050 INFO L124 PetriNetUnfolderBase]: 3823/8302 cut-off events. [2023-08-26 12:25:45,051 INFO L125 PetriNetUnfolderBase]: For 4103/4103 co-relation queries the response was YES. [2023-08-26 12:25:45,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17823 conditions, 8302 events. 3823/8302 cut-off events. For 4103/4103 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 50134 event pairs, 546 based on Foata normal form. 0/5386 useless extension candidates. Maximal degree in co-relation 17794. Up to 6374 conditions per place. [2023-08-26 12:25:45,079 INFO L140 encePairwiseOnDemand]: 285/291 looper letters, 108 selfloop transitions, 4 changer transitions 0/120 dead transitions. [2023-08-26 12:25:45,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 120 transitions, 790 flow [2023-08-26 12:25:45,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:25:45,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:25:45,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 409 transitions. [2023-08-26 12:25:45,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46849942726231386 [2023-08-26 12:25:45,080 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 409 transitions. [2023-08-26 12:25:45,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 409 transitions. [2023-08-26 12:25:45,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:25:45,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 409 transitions. [2023-08-26 12:25:45,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:25:45,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:25:45,082 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:25:45,082 INFO L175 Difference]: Start difference. First operand has 93 places, 72 transitions, 351 flow. Second operand 3 states and 409 transitions. [2023-08-26 12:25:45,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 120 transitions, 790 flow [2023-08-26 12:25:45,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 120 transitions, 784 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:25:45,087 INFO L231 Difference]: Finished difference. Result has 95 places, 76 transitions, 404 flow [2023-08-26 12:25:45,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=404, PETRI_PLACES=95, PETRI_TRANSITIONS=76} [2023-08-26 12:25:45,088 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 27 predicate places. [2023-08-26 12:25:45,088 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 76 transitions, 404 flow [2023-08-26 12:25:45,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:25:45,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:25:45,088 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:25:45,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 12:25:45,088 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 12:25:45,089 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:25:45,089 INFO L85 PathProgramCache]: Analyzing trace with hash 266732232, now seen corresponding path program 1 times [2023-08-26 12:25:45,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:25:45,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816502733] [2023-08-26 12:25:45,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:25:45,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:25:45,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:25:45,233 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 12:25:45,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:25:45,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816502733] [2023-08-26 12:25:45,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816502733] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:25:45,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:25:45,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:25:45,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196780535] [2023-08-26 12:25:45,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:25:45,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:25:45,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:25:45,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:25:45,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:25:45,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 291 [2023-08-26 12:25:45,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 76 transitions, 404 flow. Second operand has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:25:45,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:25:45,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 291 [2023-08-26 12:25:45,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:25:45,912 INFO L124 PetriNetUnfolderBase]: 4041/8496 cut-off events. [2023-08-26 12:25:45,912 INFO L125 PetriNetUnfolderBase]: For 4793/4793 co-relation queries the response was YES. [2023-08-26 12:25:45,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19569 conditions, 8496 events. 4041/8496 cut-off events. For 4793/4793 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 49939 event pairs, 619 based on Foata normal form. 408/6073 useless extension candidates. Maximal degree in co-relation 19540. Up to 6701 conditions per place. [2023-08-26 12:25:45,932 INFO L140 encePairwiseOnDemand]: 288/291 looper letters, 101 selfloop transitions, 1 changer transitions 0/108 dead transitions. [2023-08-26 12:25:45,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 108 transitions, 772 flow [2023-08-26 12:25:45,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:25:45,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:25:45,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 402 transitions. [2023-08-26 12:25:45,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46048109965635736 [2023-08-26 12:25:45,933 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 402 transitions. [2023-08-26 12:25:45,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 402 transitions. [2023-08-26 12:25:45,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:25:45,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 402 transitions. [2023-08-26 12:25:45,934 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:25:45,935 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:25:45,935 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:25:45,935 INFO L175 Difference]: Start difference. First operand has 95 places, 76 transitions, 404 flow. Second operand 3 states and 402 transitions. [2023-08-26 12:25:45,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 108 transitions, 772 flow [2023-08-26 12:25:45,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 108 transitions, 762 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:25:45,942 INFO L231 Difference]: Finished difference. Result has 94 places, 75 transitions, 401 flow [2023-08-26 12:25:45,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=401, PETRI_PLACES=94, PETRI_TRANSITIONS=75} [2023-08-26 12:25:45,942 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 26 predicate places. [2023-08-26 12:25:45,942 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 75 transitions, 401 flow [2023-08-26 12:25:45,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:25:45,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:25:45,942 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:25:45,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 12:25:45,943 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 12:25:45,943 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:25:45,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1366207234, now seen corresponding path program 1 times [2023-08-26 12:25:45,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:25:45,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812531494] [2023-08-26 12:25:45,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:25:45,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:25:45,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:25:46,366 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 36 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:25:46,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:25:46,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812531494] [2023-08-26 12:25:46,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812531494] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:25:46,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087459194] [2023-08-26 12:25:46,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:25:46,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:25:46,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:25:46,374 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 12:25:46,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-26 12:25:46,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:25:46,705 INFO L262 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-26 12:25:46,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:25:46,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:25:46,864 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-26 12:25:46,871 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-26 12:25:46,871 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-26 12:25:46,893 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 45 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:25:46,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:25:47,003 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2023-08-26 12:25:47,014 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 12:25:47,014 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 62 [2023-08-26 12:25:47,217 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 45 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:25:47,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087459194] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:25:47,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:25:47,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 38 [2023-08-26 12:25:47,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505983853] [2023-08-26 12:25:47,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:25:47,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-26 12:25:47,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:25:47,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-26 12:25:47,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=1073, Unknown=0, NotChecked=0, Total=1560 [2023-08-26 12:25:47,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 291 [2023-08-26 12:25:47,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 75 transitions, 401 flow. Second operand has 40 states, 40 states have (on average 77.425) internal successors, (3097), 40 states have internal predecessors, (3097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:25:47,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:25:47,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 291 [2023-08-26 12:25:47,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:25:49,935 INFO L124 PetriNetUnfolderBase]: 4663/9397 cut-off events. [2023-08-26 12:25:49,935 INFO L125 PetriNetUnfolderBase]: For 3673/3673 co-relation queries the response was YES. [2023-08-26 12:25:49,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21928 conditions, 9397 events. 4663/9397 cut-off events. For 3673/3673 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 49946 event pairs, 40 based on Foata normal form. 420/5692 useless extension candidates. Maximal degree in co-relation 21899. Up to 925 conditions per place. [2023-08-26 12:25:49,959 INFO L140 encePairwiseOnDemand]: 282/291 looper letters, 587 selfloop transitions, 32 changer transitions 2/621 dead transitions. [2023-08-26 12:25:49,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 621 transitions, 2987 flow [2023-08-26 12:25:49,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-26 12:25:49,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-26 12:25:49,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 2290 transitions. [2023-08-26 12:25:49,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3577007185254608 [2023-08-26 12:25:49,964 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 2290 transitions. [2023-08-26 12:25:49,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 2290 transitions. [2023-08-26 12:25:49,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:25:49,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 2290 transitions. [2023-08-26 12:25:49,968 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 104.0909090909091) internal successors, (2290), 22 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:25:49,973 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 291.0) internal successors, (6693), 23 states have internal predecessors, (6693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:25:49,973 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 291.0) internal successors, (6693), 23 states have internal predecessors, (6693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:25:49,973 INFO L175 Difference]: Start difference. First operand has 94 places, 75 transitions, 401 flow. Second operand 22 states and 2290 transitions. [2023-08-26 12:25:49,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 621 transitions, 2987 flow [2023-08-26 12:25:49,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 621 transitions, 2961 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-26 12:25:49,984 INFO L231 Difference]: Finished difference. Result has 113 places, 82 transitions, 497 flow [2023-08-26 12:25:49,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=497, PETRI_PLACES=113, PETRI_TRANSITIONS=82} [2023-08-26 12:25:49,984 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 45 predicate places. [2023-08-26 12:25:49,984 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 82 transitions, 497 flow [2023-08-26 12:25:49,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 77.425) internal successors, (3097), 40 states have internal predecessors, (3097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:25:49,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:25:49,985 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:25:49,992 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-26 12:25:50,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-26 12:25:50,191 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 12:25:50,191 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:25:50,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1368349496, now seen corresponding path program 1 times [2023-08-26 12:25:50,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:25:50,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352133167] [2023-08-26 12:25:50,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:25:50,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:25:50,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:25:50,640 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 36 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:25:50,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:25:50,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352133167] [2023-08-26 12:25:50,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352133167] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:25:50,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358663281] [2023-08-26 12:25:50,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:25:50,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:25:50,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:25:50,641 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 12:25:50,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-26 12:25:51,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:25:51,015 INFO L262 TraceCheckSpWp]: Trace formula consists of 837 conjuncts, 22 conjunts are in the unsatisfiable core [2023-08-26 12:25:51,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:25:51,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:25:51,185 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-08-26 12:25:51,190 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-26 12:25:51,190 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-26 12:25:51,214 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 45 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:25:51,214 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:26:01,382 WARN L234 SmtUtils]: Spent 6.07s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 12:26:01,404 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 46 [2023-08-26 12:26:01,417 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 12:26:01,417 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 62 [2023-08-26 12:26:01,612 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 45 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:26:01,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358663281] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:26:01,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:26:01,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 38 [2023-08-26 12:26:01,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373488541] [2023-08-26 12:26:01,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:26:01,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-26 12:26:01,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:26:01,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-26 12:26:01,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=445, Invalid=1115, Unknown=0, NotChecked=0, Total=1560 [2023-08-26 12:26:01,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 291 [2023-08-26 12:26:01,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 82 transitions, 497 flow. Second operand has 40 states, 40 states have (on average 68.425) internal successors, (2737), 40 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:01,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:26:01,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 291 [2023-08-26 12:26:01,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:26:06,523 INFO L124 PetriNetUnfolderBase]: 8659/17469 cut-off events. [2023-08-26 12:26:06,523 INFO L125 PetriNetUnfolderBase]: For 10919/10919 co-relation queries the response was YES. [2023-08-26 12:26:06,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41843 conditions, 17469 events. 8659/17469 cut-off events. For 10919/10919 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 109300 event pairs, 161 based on Foata normal form. 451/10856 useless extension candidates. Maximal degree in co-relation 41811. Up to 2024 conditions per place. [2023-08-26 12:26:06,636 INFO L140 encePairwiseOnDemand]: 279/291 looper letters, 1048 selfloop transitions, 94 changer transitions 3/1145 dead transitions. [2023-08-26 12:26:06,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 1145 transitions, 5649 flow [2023-08-26 12:26:06,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-08-26 12:26:06,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2023-08-26 12:26:06,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3649 transitions. [2023-08-26 12:26:06,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33890591622550387 [2023-08-26 12:26:06,651 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3649 transitions. [2023-08-26 12:26:06,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3649 transitions. [2023-08-26 12:26:06,652 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:26:06,652 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3649 transitions. [2023-08-26 12:26:06,656 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 98.62162162162163) internal successors, (3649), 37 states have internal predecessors, (3649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:06,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 291.0) internal successors, (11058), 38 states have internal predecessors, (11058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:06,664 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 291.0) internal successors, (11058), 38 states have internal predecessors, (11058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:06,664 INFO L175 Difference]: Start difference. First operand has 113 places, 82 transitions, 497 flow. Second operand 37 states and 3649 transitions. [2023-08-26 12:26:06,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 1145 transitions, 5649 flow [2023-08-26 12:26:06,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 1145 transitions, 5440 flow, removed 32 selfloop flow, removed 13 redundant places. [2023-08-26 12:26:06,695 INFO L231 Difference]: Finished difference. Result has 169 places, 152 transitions, 1235 flow [2023-08-26 12:26:06,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1235, PETRI_PLACES=169, PETRI_TRANSITIONS=152} [2023-08-26 12:26:06,696 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 101 predicate places. [2023-08-26 12:26:06,696 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 152 transitions, 1235 flow [2023-08-26 12:26:06,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 68.425) internal successors, (2737), 40 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:26:06,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:26:06,696 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:26:06,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-26 12:26:06,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-26 12:26:06,905 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2023-08-26 12:26:06,905 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:26:06,905 INFO L85 PathProgramCache]: Analyzing trace with hash 597257618, now seen corresponding path program 1 times [2023-08-26 12:26:06,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:26:06,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606115399] [2023-08-26 12:26:06,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:26:06,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:26:07,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:26:09,913 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:26:09,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:26:09,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606115399] [2023-08-26 12:26:09,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606115399] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:26:09,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755895787] [2023-08-26 12:26:09,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:26:09,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:26:09,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:26:09,925 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 12:26:09,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-26 12:26:10,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:26:10,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 183 conjunts are in the unsatisfiable core [2023-08-26 12:26:10,414 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:26:10,436 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-26 12:26:10,436 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-08-26 12:26:10,483 INFO L322 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-08-26 12:26:10,483 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-08-26 12:26:10,490 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-08-26 12:26:10,500 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-08-26 12:26:10,513 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2023-08-26 12:26:10,527 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2023-08-26 12:26:10,544 INFO L160 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 12:26:10,545 INFO L165 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 64 [2023-08-26 12:26:10,607 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2023-08-26 12:26:10,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:10,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:10,633 INFO L322 Elim1Store]: treesize reduction 38, result has 43.3 percent of original size [2023-08-26 12:26:10,633 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 86 treesize of output 101 [2023-08-26 12:26:10,668 INFO L322 Elim1Store]: treesize reduction 47, result has 37.3 percent of original size [2023-08-26 12:26:10,668 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 68 treesize of output 86 [2023-08-26 12:26:10,704 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2023-08-26 12:26:10,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:10,745 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2023-08-26 12:26:10,807 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2023-08-26 12:26:10,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:10,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:10,823 INFO L322 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-26 12:26:10,823 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 45 [2023-08-26 12:26:10,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:10,830 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2023-08-26 12:26:10,839 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-26 12:26:10,857 INFO L322 Elim1Store]: treesize reduction 55, result has 28.6 percent of original size [2023-08-26 12:26:10,857 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 36 [2023-08-26 12:26:10,983 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2023-08-26 12:26:10,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:10,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:10,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:10,990 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 41 [2023-08-26 12:26:10,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:10,997 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 26 [2023-08-26 12:26:11,007 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-26 12:26:11,035 INFO L322 Elim1Store]: treesize reduction 73, result has 29.8 percent of original size [2023-08-26 12:26:11,035 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 31 treesize of output 48 [2023-08-26 12:26:11,123 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2023-08-26 12:26:11,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:11,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:11,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:11,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:11,133 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 59 [2023-08-26 12:26:11,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:11,140 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 30 [2023-08-26 12:26:11,153 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-26 12:26:11,186 INFO L322 Elim1Store]: treesize reduction 91, result has 30.5 percent of original size [2023-08-26 12:26:11,186 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 36 treesize of output 60 [2023-08-26 12:26:11,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:11,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:11,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:11,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:11,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:11,311 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 77 [2023-08-26 12:26:11,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:11,321 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2023-08-26 12:26:11,376 INFO L322 Elim1Store]: treesize reduction 119, result has 29.2 percent of original size [2023-08-26 12:26:11,377 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 41 treesize of output 72 [2023-08-26 12:26:11,501 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2023-08-26 12:26:11,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:11,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:11,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:11,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:11,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:11,512 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 77 [2023-08-26 12:26:11,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:11,522 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2023-08-26 12:26:11,535 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-26 12:26:11,574 INFO L322 Elim1Store]: treesize reduction 109, result has 31.0 percent of original size [2023-08-26 12:26:11,575 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 41 treesize of output 72 [2023-08-26 12:26:11,769 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2023-08-26 12:26:11,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:11,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:11,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:11,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:11,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:11,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:11,782 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 95 [2023-08-26 12:26:11,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:11,793 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2023-08-26 12:26:11,812 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-26 12:26:11,860 INFO L322 Elim1Store]: treesize reduction 127, result has 31.4 percent of original size [2023-08-26 12:26:11,860 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 7 select indices, 7 select index equivalence classes, 14 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 46 treesize of output 84 [2023-08-26 12:26:12,096 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2023-08-26 12:26:12,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:12,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:12,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:12,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:12,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:12,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:12,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:12,122 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 113 [2023-08-26 12:26:12,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:12,136 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 42 [2023-08-26 12:26:12,172 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-26 12:26:12,243 INFO L322 Elim1Store]: treesize reduction 145, result has 31.6 percent of original size [2023-08-26 12:26:12,243 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 8 select indices, 8 select index equivalence classes, 20 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 96 [2023-08-26 12:26:12,606 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2023-08-26 12:26:12,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:12,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:12,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:12,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:12,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:12,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:12,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:12,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:12,643 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 131 [2023-08-26 12:26:12,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 12:26:12,658 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2023-08-26 12:26:12,683 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-26 12:26:12,762 INFO L322 Elim1Store]: treesize reduction 163, result has 31.8 percent of original size [2023-08-26 12:26:12,763 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 9 select indices, 9 select index equivalence classes, 27 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 17 case distinctions, treesize of input 56 treesize of output 108 [2023-08-26 12:26:17,113 INFO L322 Elim1Store]: treesize reduction 70, result has 47.8 percent of original size [2023-08-26 12:26:17,114 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 29 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 7 case distinctions, treesize of input 135 treesize of output 172 [2023-08-26 12:26:45,275 INFO L322 Elim1Store]: treesize reduction 186, result has 32.6 percent of original size [2023-08-26 12:26:45,276 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 10 select indices, 10 select index equivalence classes, 35 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 19 case distinctions, treesize of input 61 treesize of output 125 [2023-08-26 12:26:46,015 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 35 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 138 [2023-08-26 12:26:46,974 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 35 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 138 [2023-08-26 12:26:56,311 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 33 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 59 [2023-08-26 12:26:56,528 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 28 proven. 19 refuted. 8 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:26:56,528 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:26:56,556 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5192 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_5192) |c_~#slot~0.base|) (+ |c_~#slot~0.offset| (* |c_ULTIMATE.start_main_~j~0#1| 4)))) 1)) is different from false [2023-08-26 12:26:56,701 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 12:26:56,701 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 48 [2023-08-26 12:26:56,781 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 12:26:56,781 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 87 [2023-08-26 12:26:56,892 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 12:26:56,892 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 193 treesize of output 162 [2023-08-26 12:26:57,073 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 12:26:57,074 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 380 treesize of output 309 [2023-08-26 12:26:59,643 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 12:26:59,643 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 1490 treesize of output 1179 [2023-08-26 12:27:02,586 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 12:27:02,587 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 2965 treesize of output 2334 [2023-08-26 12:27:03,598 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 12:27:03,598 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 5912 treesize of output 4641 [2023-08-26 12:27:07,222 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 12:27:07,223 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 11803 treesize of output 9252 [2023-08-26 12:27:17,063 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-26 12:27:17,065 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-26 12:27:17,074 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-26 12:27:17,075 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-26 12:27:17,077 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-26 12:27:17,079 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-26 12:27:17,095 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-26 12:27:17,099 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-26 12:27:17,104 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-26 12:27:17,117 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-26 12:27:17,125 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 282 treesize of output 280 [2023-08-26 12:27:17,439 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12885426291 treesize of output 12884902003 [2023-08-26 12:27:24,041 WARN L234 SmtUtils]: Spent 6.55s on a formula simplification. DAG size of input: 16830 DAG size of output: 334 (called from [L 729] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-08-26 12:28:05,184 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13511348637974523 treesize of output 13510798882160635 Received shutdown request... [2023-08-26 12:35:16,609 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-26 12:35:16,609 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-26 12:35:17,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-26 12:35:17,753 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 Cannot interrupt operation gracefully because timeout expired. Forcing shutdown