/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_76-tricky_address3_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 19:01:42,078 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 19:01:42,167 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 19:01:42,173 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 19:01:42,173 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 19:01:42,205 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 19:01:42,206 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 19:01:42,206 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 19:01:42,207 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 19:01:42,210 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 19:01:42,211 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 19:01:42,211 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 19:01:42,211 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 19:01:42,212 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 19:01:42,213 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 19:01:42,213 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 19:01:42,213 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 19:01:42,213 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 19:01:42,213 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 19:01:42,214 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 19:01:42,214 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 19:01:42,214 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 19:01:42,214 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 19:01:42,215 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 19:01:42,215 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 19:01:42,215 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 19:01:42,216 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 19:01:42,216 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 19:01:42,216 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 19:01:42,216 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 19:01:42,217 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 19:01:42,217 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 19:01:42,218 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 19:01:42,218 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 19:01:42,218 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 19:01:42,218 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 19:01:42,509 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 19:01:42,531 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 19:01:42,534 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 19:01:42,535 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 19:01:42,536 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 19:01:42,538 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_76-tricky_address3_racefree.i [2023-08-26 19:01:43,765 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 19:01:44,130 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 19:01:44,131 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_76-tricky_address3_racefree.i [2023-08-26 19:01:44,151 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f18fa7b0/10b1ed973d344690bcf7d480168b9fea/FLAG732733d36 [2023-08-26 19:01:44,167 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f18fa7b0/10b1ed973d344690bcf7d480168b9fea [2023-08-26 19:01:44,171 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 19:01:44,173 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 19:01:44,175 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 19:01:44,175 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 19:01:44,178 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 19:01:44,179 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 07:01:44" (1/1) ... [2023-08-26 19:01:44,180 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3de65487 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:01:44, skipping insertion in model container [2023-08-26 19:01:44,180 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 07:01:44" (1/1) ... [2023-08-26 19:01:44,239 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 19:01:44,683 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 19:01:44,697 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 19:01:44,711 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 19:01:44,720 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 19:01:44,727 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [736] [2023-08-26 19:01:44,742 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 19:01:44,794 INFO L206 MainTranslator]: Completed translation [2023-08-26 19:01:44,794 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:01:44 WrapperNode [2023-08-26 19:01:44,794 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 19:01:44,795 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 19:01:44,796 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 19:01:44,796 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 19:01:44,802 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:01:44" (1/1) ... [2023-08-26 19:01:44,828 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:01:44" (1/1) ... [2023-08-26 19:01:44,857 INFO L138 Inliner]: procedures = 270, calls = 42, calls flagged for inlining = 7, calls inlined = 8, statements flattened = 202 [2023-08-26 19:01:44,857 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 19:01:44,858 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 19:01:44,858 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 19:01:44,858 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 19:01:44,869 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:01:44" (1/1) ... [2023-08-26 19:01:44,869 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:01:44" (1/1) ... [2023-08-26 19:01:44,887 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:01:44" (1/1) ... [2023-08-26 19:01:44,888 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:01:44" (1/1) ... [2023-08-26 19:01:44,895 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:01:44" (1/1) ... [2023-08-26 19:01:44,899 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:01:44" (1/1) ... [2023-08-26 19:01:44,912 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:01:44" (1/1) ... [2023-08-26 19:01:44,914 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:01:44" (1/1) ... [2023-08-26 19:01:44,916 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 19:01:44,917 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 19:01:44,917 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 19:01:44,917 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 19:01:44,918 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:01:44" (1/1) ... [2023-08-26 19:01:44,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 19:01:44,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:01:44,947 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 19:01:44,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-26 19:01:44,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 19:01:44,973 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 19:01:44,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 19:01:44,973 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 19:01:44,973 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 19:01:44,973 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 19:01:44,973 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-26 19:01:44,974 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-26 19:01:44,974 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 19:01:44,974 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 19:01:44,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 19:01:44,975 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 19:01:45,096 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 19:01:45,098 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 19:01:45,552 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 19:01:45,559 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 19:01:45,559 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-08-26 19:01:45,562 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 07:01:45 BoogieIcfgContainer [2023-08-26 19:01:45,562 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 19:01:45,565 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 19:01:45,565 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 19:01:45,567 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 19:01:45,568 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 07:01:44" (1/3) ... [2023-08-26 19:01:45,569 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b3b7d39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 07:01:45, skipping insertion in model container [2023-08-26 19:01:45,569 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 07:01:44" (2/3) ... [2023-08-26 19:01:45,569 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b3b7d39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 07:01:45, skipping insertion in model container [2023-08-26 19:01:45,569 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 07:01:45" (3/3) ... [2023-08-26 19:01:45,570 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_76-tricky_address3_racefree.i [2023-08-26 19:01:45,590 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 19:01:45,590 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-08-26 19:01:45,590 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 19:01:45,683 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-26 19:01:45,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 228 transitions, 464 flow [2023-08-26 19:01:45,790 INFO L124 PetriNetUnfolderBase]: 48/318 cut-off events. [2023-08-26 19:01:45,790 INFO L125 PetriNetUnfolderBase]: For 1/2 co-relation queries the response was YES. [2023-08-26 19:01:45,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324 conditions, 318 events. 48/318 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1193 event pairs, 0 based on Foata normal form. 0/226 useless extension candidates. Maximal degree in co-relation 180. Up to 8 conditions per place. [2023-08-26 19:01:45,799 INFO L82 GeneralOperation]: Start removeDead. Operand has 198 places, 228 transitions, 464 flow [2023-08-26 19:01:45,806 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 198 places, 228 transitions, 464 flow [2023-08-26 19:01:45,810 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 19:01:45,817 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 198 places, 228 transitions, 464 flow [2023-08-26 19:01:45,819 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 198 places, 228 transitions, 464 flow [2023-08-26 19:01:45,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 228 transitions, 464 flow [2023-08-26 19:01:45,864 INFO L124 PetriNetUnfolderBase]: 48/318 cut-off events. [2023-08-26 19:01:45,865 INFO L125 PetriNetUnfolderBase]: For 1/2 co-relation queries the response was YES. [2023-08-26 19:01:45,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324 conditions, 318 events. 48/318 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1193 event pairs, 0 based on Foata normal form. 0/226 useless extension candidates. Maximal degree in co-relation 180. Up to 8 conditions per place. [2023-08-26 19:01:45,875 INFO L119 LiptonReduction]: Number of co-enabled transitions 16320 [2023-08-26 19:01:49,732 INFO L134 LiptonReduction]: Checked pairs total: 30848 [2023-08-26 19:01:49,732 INFO L136 LiptonReduction]: Total number of compositions: 217 [2023-08-26 19:01:49,749 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 19:01:49,761 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;@6f66cbcf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 19:01:49,761 INFO L358 AbstractCegarLoop]: Starting to check reachability of 37 error locations. [2023-08-26 19:01:49,769 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 19:01:49,769 INFO L124 PetriNetUnfolderBase]: 1/5 cut-off events. [2023-08-26 19:01:49,769 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 19:01:49,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:01:49,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 19:01:49,770 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-26 19:01:49,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:01:49,774 INFO L85 PathProgramCache]: Analyzing trace with hash 914444, now seen corresponding path program 1 times [2023-08-26 19:01:49,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:01:49,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149387738] [2023-08-26 19:01:49,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:01:49,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:01:49,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:01:49,982 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 19:01:49,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:01:49,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149387738] [2023-08-26 19:01:49,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149387738] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:01:49,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:01:49,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 19:01:49,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710291641] [2023-08-26 19:01:49,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:01:49,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:01:49,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:01:50,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:01:50,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:01:50,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 445 [2023-08-26 19:01:50,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 92 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:01:50,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:01:50,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 445 [2023-08-26 19:01:50,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:01:50,230 INFO L124 PetriNetUnfolderBase]: 563/1291 cut-off events. [2023-08-26 19:01:50,230 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 19:01:50,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2403 conditions, 1291 events. 563/1291 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 8513 event pairs, 513 based on Foata normal form. 98/936 useless extension candidates. Maximal degree in co-relation 2324. Up to 1105 conditions per place. [2023-08-26 19:01:50,239 INFO L140 encePairwiseOnDemand]: 415/445 looper letters, 51 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-08-26 19:01:50,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 66 transitions, 246 flow [2023-08-26 19:01:50,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:01:50,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:01:50,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 642 transitions. [2023-08-26 19:01:50,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48089887640449436 [2023-08-26 19:01:50,254 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 642 transitions. [2023-08-26 19:01:50,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 642 transitions. [2023-08-26 19:01:50,256 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:01:50,259 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 642 transitions. [2023-08-26 19:01:50,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:01:50,269 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 445.0) internal successors, (1780), 4 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:01:50,270 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 445.0) internal successors, (1780), 4 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:01:50,272 INFO L175 Difference]: Start difference. First operand has 70 places, 92 transitions, 192 flow. Second operand 3 states and 642 transitions. [2023-08-26 19:01:50,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 66 transitions, 246 flow [2023-08-26 19:01:50,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 66 transitions, 246 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 19:01:50,277 INFO L231 Difference]: Finished difference. Result has 67 places, 66 transitions, 150 flow [2023-08-26 19:01:50,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=445, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=67, PETRI_TRANSITIONS=66} [2023-08-26 19:01:50,282 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -3 predicate places. [2023-08-26 19:01:50,283 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 66 transitions, 150 flow [2023-08-26 19:01:50,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:01:50,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:01:50,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 19:01:50,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 19:01:50,284 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-26 19:01:50,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:01:50,284 INFO L85 PathProgramCache]: Analyzing trace with hash 28310633, now seen corresponding path program 1 times [2023-08-26 19:01:50,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:01:50,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234037822] [2023-08-26 19:01:50,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:01:50,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:01:50,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:01:50,355 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 19:01:50,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:01:50,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234037822] [2023-08-26 19:01:50,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234037822] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:01:50,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004016801] [2023-08-26 19:01:50,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:01:50,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:01:50,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:01:50,361 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 19:01:50,398 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 19:01:50,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:01:50,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-26 19:01:50,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:01:50,513 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 19:01:50,514 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:01:50,528 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 19:01:50,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004016801] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:01:50,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:01:50,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-26 19:01:50,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994716075] [2023-08-26 19:01:50,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:01:50,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 19:01:50,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:01:50,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 19:01:50,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-26 19:01:50,533 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 445 [2023-08-26 19:01:50,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 66 transitions, 150 flow. Second operand has 7 states, 7 states have (on average 188.28571428571428) internal successors, (1318), 7 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:01:50,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:01:50,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 445 [2023-08-26 19:01:50,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:01:50,779 INFO L124 PetriNetUnfolderBase]: 563/1294 cut-off events. [2023-08-26 19:01:50,779 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 19:01:50,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2419 conditions, 1294 events. 563/1294 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 8514 event pairs, 513 based on Foata normal form. 0/841 useless extension candidates. Maximal degree in co-relation 2407. Up to 1105 conditions per place. [2023-08-26 19:01:50,787 INFO L140 encePairwiseOnDemand]: 442/445 looper letters, 51 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2023-08-26 19:01:50,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 69 transitions, 274 flow [2023-08-26 19:01:50,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 19:01:50,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 19:01:50,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1181 transitions. [2023-08-26 19:01:50,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44232209737827716 [2023-08-26 19:01:50,792 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1181 transitions. [2023-08-26 19:01:50,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1181 transitions. [2023-08-26 19:01:50,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:01:50,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1181 transitions. [2023-08-26 19:01:50,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 196.83333333333334) internal successors, (1181), 6 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:01:50,801 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 445.0) internal successors, (3115), 7 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:01:50,803 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 445.0) internal successors, (3115), 7 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:01:50,803 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 150 flow. Second operand 6 states and 1181 transitions. [2023-08-26 19:01:50,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 69 transitions, 274 flow [2023-08-26 19:01:50,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 69 transitions, 270 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-26 19:01:50,850 INFO L231 Difference]: Finished difference. Result has 74 places, 69 transitions, 182 flow [2023-08-26 19:01:50,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=445, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=182, PETRI_PLACES=74, PETRI_TRANSITIONS=69} [2023-08-26 19:01:50,852 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 4 predicate places. [2023-08-26 19:01:50,852 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 69 transitions, 182 flow [2023-08-26 19:01:50,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 188.28571428571428) internal successors, (1318), 7 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:01:50,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:01:50,856 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-26 19:01:50,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-26 19:01:51,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:01:51,064 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-26 19:01:51,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:01:51,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1551575821, now seen corresponding path program 2 times [2023-08-26 19:01:51,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:01:51,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355384899] [2023-08-26 19:01:51,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:01:51,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:01:51,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:01:51,147 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-26 19:01:51,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:01:51,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355384899] [2023-08-26 19:01:51,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355384899] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:01:51,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:01:51,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 19:01:51,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337529230] [2023-08-26 19:01:51,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:01:51,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:01:51,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:01:51,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:01:51,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:01:51,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 445 [2023-08-26 19:01:51,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 69 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:01:51,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:01:51,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 445 [2023-08-26 19:01:51,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:01:51,343 INFO L124 PetriNetUnfolderBase]: 648/1375 cut-off events. [2023-08-26 19:01:51,343 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 19:01:51,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2685 conditions, 1375 events. 648/1375 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8612 event pairs, 575 based on Foata normal form. 0/877 useless extension candidates. Maximal degree in co-relation 2651. Up to 1226 conditions per place. [2023-08-26 19:01:51,351 INFO L140 encePairwiseOnDemand]: 441/445 looper letters, 77 selfloop transitions, 2 changer transitions 3/90 dead transitions. [2023-08-26 19:01:51,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 90 transitions, 388 flow [2023-08-26 19:01:51,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:01:51,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:01:51,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 560 transitions. [2023-08-26 19:01:51,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41947565543071164 [2023-08-26 19:01:51,353 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 560 transitions. [2023-08-26 19:01:51,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 560 transitions. [2023-08-26 19:01:51,354 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:01:51,354 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 560 transitions. [2023-08-26 19:01:51,355 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:01:51,358 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 445.0) internal successors, (1780), 4 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:01:51,359 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 445.0) internal successors, (1780), 4 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:01:51,359 INFO L175 Difference]: Start difference. First operand has 74 places, 69 transitions, 182 flow. Second operand 3 states and 560 transitions. [2023-08-26 19:01:51,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 90 transitions, 388 flow [2023-08-26 19:01:51,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 90 transitions, 374 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-26 19:01:51,362 INFO L231 Difference]: Finished difference. Result has 73 places, 67 transitions, 168 flow [2023-08-26 19:01:51,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=445, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=73, PETRI_TRANSITIONS=67} [2023-08-26 19:01:51,363 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 3 predicate places. [2023-08-26 19:01:51,363 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 67 transitions, 168 flow [2023-08-26 19:01:51,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:01:51,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:01:51,364 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-26 19:01:51,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 19:01:51,364 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-26 19:01:51,364 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:01:51,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1551575820, now seen corresponding path program 1 times [2023-08-26 19:01:51,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:01:51,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229410539] [2023-08-26 19:01:51,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:01:51,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:01:51,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:01:51,486 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 19:01:51,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:01:51,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229410539] [2023-08-26 19:01:51,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229410539] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:01:51,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389006658] [2023-08-26 19:01:51,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:01:51,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:01:51,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:01:51,489 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 19:01:51,492 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 19:01:51,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:01:51,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 19:01:51,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:01:51,572 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 19:01:51,572 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:01:51,620 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 19:01:51,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389006658] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:01:51,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:01:51,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-26 19:01:51,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465952254] [2023-08-26 19:01:51,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:01:51,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 19:01:51,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:01:51,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 19:01:51,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-26 19:01:51,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 445 [2023-08-26 19:01:51,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 67 transitions, 168 flow. Second operand has 13 states, 13 states have (on average 188.15384615384616) internal successors, (2446), 13 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:01:51,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:01:51,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 445 [2023-08-26 19:01:51,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:01:51,797 INFO L124 PetriNetUnfolderBase]: 523/1210 cut-off events. [2023-08-26 19:01:51,798 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2023-08-26 19:01:51,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2302 conditions, 1210 events. 523/1210 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7821 event pairs, 475 based on Foata normal form. 6/841 useless extension candidates. Maximal degree in co-relation 2250. Up to 1025 conditions per place. [2023-08-26 19:01:51,805 INFO L140 encePairwiseOnDemand]: 442/445 looper letters, 49 selfloop transitions, 11 changer transitions 0/73 dead transitions. [2023-08-26 19:01:51,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 73 transitions, 324 flow [2023-08-26 19:01:51,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 19:01:51,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 19:01:51,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2310 transitions. [2023-08-26 19:01:51,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43258426966292135 [2023-08-26 19:01:51,811 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2310 transitions. [2023-08-26 19:01:51,811 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2310 transitions. [2023-08-26 19:01:51,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:01:51,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2310 transitions. [2023-08-26 19:01:51,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 192.5) internal successors, (2310), 12 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:01:51,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 445.0) internal successors, (5785), 13 states have internal predecessors, (5785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:01:51,830 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 445.0) internal successors, (5785), 13 states have internal predecessors, (5785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:01:51,830 INFO L175 Difference]: Start difference. First operand has 73 places, 67 transitions, 168 flow. Second operand 12 states and 2310 transitions. [2023-08-26 19:01:51,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 73 transitions, 324 flow [2023-08-26 19:01:51,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 73 transitions, 320 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 19:01:51,837 INFO L231 Difference]: Finished difference. Result has 88 places, 73 transitions, 248 flow [2023-08-26 19:01:51,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=445, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=248, PETRI_PLACES=88, PETRI_TRANSITIONS=73} [2023-08-26 19:01:51,841 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 18 predicate places. [2023-08-26 19:01:51,841 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 73 transitions, 248 flow [2023-08-26 19:01:51,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 188.15384615384616) internal successors, (2446), 13 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:01:51,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:01:51,843 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-08-26 19:01:51,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-26 19:01:52,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-26 19:01:52,049 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-26 19:01:52,049 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:01:52,049 INFO L85 PathProgramCache]: Analyzing trace with hash 934440332, now seen corresponding path program 2 times [2023-08-26 19:01:52,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:01:52,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446491978] [2023-08-26 19:01:52,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:01:52,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:01:52,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:01:52,174 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 19:01:52,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:01:52,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446491978] [2023-08-26 19:01:52,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446491978] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:01:52,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:01:52,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 19:01:52,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590896096] [2023-08-26 19:01:52,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:01:52,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:01:52,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:01:52,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:01:52,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:01:52,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 445 [2023-08-26 19:01:52,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 73 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:01:52,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:01:52,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 445 [2023-08-26 19:01:52,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:01:52,428 INFO L124 PetriNetUnfolderBase]: 543/1217 cut-off events. [2023-08-26 19:01:52,429 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-08-26 19:01:52,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2409 conditions, 1217 events. 543/1217 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 8125 event pairs, 0 based on Foata normal form. 0/843 useless extension candidates. Maximal degree in co-relation 2333. Up to 1084 conditions per place. [2023-08-26 19:01:52,436 INFO L140 encePairwiseOnDemand]: 441/445 looper letters, 81 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-08-26 19:01:52,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 94 transitions, 456 flow [2023-08-26 19:01:52,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:01:52,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:01:52,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 540 transitions. [2023-08-26 19:01:52,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4044943820224719 [2023-08-26 19:01:52,439 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 540 transitions. [2023-08-26 19:01:52,439 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 540 transitions. [2023-08-26 19:01:52,439 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:01:52,439 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 540 transitions. [2023-08-26 19:01:52,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:01:52,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 445.0) internal successors, (1780), 4 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:01:52,443 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 445.0) internal successors, (1780), 4 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:01:52,443 INFO L175 Difference]: Start difference. First operand has 88 places, 73 transitions, 248 flow. Second operand 3 states and 540 transitions. [2023-08-26 19:01:52,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 94 transitions, 456 flow [2023-08-26 19:01:52,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 94 transitions, 408 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-26 19:01:52,446 INFO L231 Difference]: Finished difference. Result has 86 places, 73 transitions, 210 flow [2023-08-26 19:01:52,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=445, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=210, PETRI_PLACES=86, PETRI_TRANSITIONS=73} [2023-08-26 19:01:52,447 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 16 predicate places. [2023-08-26 19:01:52,447 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 73 transitions, 210 flow [2023-08-26 19:01:52,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:01:52,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:01:52,448 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-08-26 19:01:52,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 19:01:52,448 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-26 19:01:52,449 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:01:52,449 INFO L85 PathProgramCache]: Analyzing trace with hash -2065438184, now seen corresponding path program 1 times [2023-08-26 19:01:52,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:01:52,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504612682] [2023-08-26 19:01:52,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:01:52,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:01:52,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:01:52,591 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 19:01:52,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:01:52,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504612682] [2023-08-26 19:01:52,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504612682] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:01:52,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917782308] [2023-08-26 19:01:52,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:01:52,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:01:52,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:01:52,593 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 19:01:52,616 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 19:01:52,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:01:52,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 19:01:52,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:01:52,735 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 19:01:52,787 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 19:01:52,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:01:52,845 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 19:01:52,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917782308] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:01:52,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:01:52,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-26 19:01:52,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534742485] [2023-08-26 19:01:52,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:01:52,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 19:01:52,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:01:52,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 19:01:52,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-26 19:01:52,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 445 [2023-08-26 19:01:52,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 73 transitions, 210 flow. Second operand has 8 states, 8 states have (on average 157.125) internal successors, (1257), 8 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:01:52,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:01:52,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 445 [2023-08-26 19:01:52,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:01:52,971 INFO L124 PetriNetUnfolderBase]: 44/136 cut-off events. [2023-08-26 19:01:52,971 INFO L125 PetriNetUnfolderBase]: For 103/103 co-relation queries the response was YES. [2023-08-26 19:01:52,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342 conditions, 136 events. 44/136 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 435 event pairs, 16 based on Foata normal form. 21/139 useless extension candidates. Maximal degree in co-relation 289. Up to 82 conditions per place. [2023-08-26 19:01:52,972 INFO L140 encePairwiseOnDemand]: 441/445 looper letters, 45 selfloop transitions, 2 changer transitions 11/64 dead transitions. [2023-08-26 19:01:52,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 64 transitions, 299 flow [2023-08-26 19:01:52,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 19:01:52,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 19:01:52,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 669 transitions. [2023-08-26 19:01:52,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3758426966292135 [2023-08-26 19:01:52,975 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 669 transitions. [2023-08-26 19:01:52,975 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 669 transitions. [2023-08-26 19:01:52,976 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:01:52,976 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 669 transitions. [2023-08-26 19:01:52,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 167.25) internal successors, (669), 4 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:01:52,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 445.0) internal successors, (2225), 5 states have internal predecessors, (2225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:01:52,981 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 445.0) internal successors, (2225), 5 states have internal predecessors, (2225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:01:52,981 INFO L175 Difference]: Start difference. First operand has 86 places, 73 transitions, 210 flow. Second operand 4 states and 669 transitions. [2023-08-26 19:01:52,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 64 transitions, 299 flow [2023-08-26 19:01:52,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 64 transitions, 293 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 19:01:52,984 INFO L231 Difference]: Finished difference. Result has 58 places, 37 transitions, 129 flow [2023-08-26 19:01:52,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=445, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=129, PETRI_PLACES=58, PETRI_TRANSITIONS=37} [2023-08-26 19:01:52,986 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -12 predicate places. [2023-08-26 19:01:52,987 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 37 transitions, 129 flow [2023-08-26 19:01:52,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 157.125) internal successors, (1257), 8 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:01:52,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:01:52,987 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:01:52,997 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 19:01:53,193 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 19:01:53,194 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-26 19:01:53,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:01:53,195 INFO L85 PathProgramCache]: Analyzing trace with hash 395970435, now seen corresponding path program 1 times [2023-08-26 19:01:53,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:01:53,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837518707] [2023-08-26 19:01:53,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:01:53,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:01:53,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:01:53,476 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 19:01:53,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:01:53,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837518707] [2023-08-26 19:01:53,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837518707] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:01:53,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:01:53,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 19:01:53,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21069580] [2023-08-26 19:01:53,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:01:53,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 19:01:53,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:01:53,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 19:01:53,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-26 19:01:53,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 445 [2023-08-26 19:01:53,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 37 transitions, 129 flow. Second operand has 6 states, 6 states have (on average 143.33333333333334) internal successors, (860), 6 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:01:53,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:01:53,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 445 [2023-08-26 19:01:53,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:01:53,548 INFO L124 PetriNetUnfolderBase]: 31/99 cut-off events. [2023-08-26 19:01:53,548 INFO L125 PetriNetUnfolderBase]: For 71/71 co-relation queries the response was YES. [2023-08-26 19:01:53,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 99 events. 31/99 cut-off events. For 71/71 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 231 event pairs, 0 based on Foata normal form. 3/87 useless extension candidates. Maximal degree in co-relation 197. Up to 75 conditions per place. [2023-08-26 19:01:53,549 INFO L140 encePairwiseOnDemand]: 439/445 looper letters, 30 selfloop transitions, 3 changer transitions 0/36 dead transitions. [2023-08-26 19:01:53,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 36 transitions, 195 flow [2023-08-26 19:01:53,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 19:01:53,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 19:01:53,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 736 transitions. [2023-08-26 19:01:53,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33078651685393257 [2023-08-26 19:01:53,552 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 736 transitions. [2023-08-26 19:01:53,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 736 transitions. [2023-08-26 19:01:53,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:01:53,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 736 transitions. [2023-08-26 19:01:53,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 147.2) internal successors, (736), 5 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:01:53,557 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 445.0) internal successors, (2670), 6 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:01:53,558 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 445.0) internal successors, (2670), 6 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:01:53,558 INFO L175 Difference]: Start difference. First operand has 58 places, 37 transitions, 129 flow. Second operand 5 states and 736 transitions. [2023-08-26 19:01:53,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 36 transitions, 195 flow [2023-08-26 19:01:53,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 36 transitions, 191 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 19:01:53,562 INFO L231 Difference]: Finished difference. Result has 52 places, 34 transitions, 126 flow [2023-08-26 19:01:53,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=445, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=126, PETRI_PLACES=52, PETRI_TRANSITIONS=34} [2023-08-26 19:01:53,563 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -18 predicate places. [2023-08-26 19:01:53,564 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 34 transitions, 126 flow [2023-08-26 19:01:53,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 143.33333333333334) internal successors, (860), 6 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:01:53,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:01:53,564 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:01:53,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 19:01:53,565 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr10ASSERT_VIOLATIONASSERT === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-26 19:01:53,566 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:01:53,566 INFO L85 PathProgramCache]: Analyzing trace with hash -609823291, now seen corresponding path program 1 times [2023-08-26 19:01:53,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:01:53,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491267973] [2023-08-26 19:01:53,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:01:53,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:01:53,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:01:53,772 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 19:01:53,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:01:53,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491267973] [2023-08-26 19:01:53,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491267973] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:01:53,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:01:53,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 19:01:53,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272608905] [2023-08-26 19:01:53,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:01:53,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 19:01:53,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:01:53,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 19:01:53,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-26 19:01:53,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 445 [2023-08-26 19:01:53,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 34 transitions, 126 flow. Second operand has 6 states, 6 states have (on average 136.33333333333334) internal successors, (818), 6 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:01:53,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:01:53,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 445 [2023-08-26 19:01:53,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:01:53,865 INFO L124 PetriNetUnfolderBase]: 29/111 cut-off events. [2023-08-26 19:01:53,865 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2023-08-26 19:01:53,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276 conditions, 111 events. 29/111 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 343 event pairs, 0 based on Foata normal form. 0/95 useless extension candidates. Maximal degree in co-relation 223. Up to 32 conditions per place. [2023-08-26 19:01:53,866 INFO L140 encePairwiseOnDemand]: 439/445 looper letters, 37 selfloop transitions, 6 changer transitions 0/46 dead transitions. [2023-08-26 19:01:53,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 46 transitions, 238 flow [2023-08-26 19:01:53,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 19:01:53,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 19:01:53,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 709 transitions. [2023-08-26 19:01:53,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31865168539325844 [2023-08-26 19:01:53,870 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 709 transitions. [2023-08-26 19:01:53,870 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 709 transitions. [2023-08-26 19:01:53,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:01:53,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 709 transitions. [2023-08-26 19:01:53,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 141.8) internal successors, (709), 5 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:01:53,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 445.0) internal successors, (2670), 6 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:01:53,877 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 445.0) internal successors, (2670), 6 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:01:53,877 INFO L175 Difference]: Start difference. First operand has 52 places, 34 transitions, 126 flow. Second operand 5 states and 709 transitions. [2023-08-26 19:01:53,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 46 transitions, 238 flow [2023-08-26 19:01:53,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 46 transitions, 233 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 19:01:53,879 INFO L231 Difference]: Finished difference. Result has 54 places, 36 transitions, 144 flow [2023-08-26 19:01:53,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=445, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=144, PETRI_PLACES=54, PETRI_TRANSITIONS=36} [2023-08-26 19:01:53,881 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -16 predicate places. [2023-08-26 19:01:53,882 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 36 transitions, 144 flow [2023-08-26 19:01:53,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 136.33333333333334) internal successors, (818), 6 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:01:53,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:01:53,882 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:01:53,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 19:01:53,883 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-26 19:01:53,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:01:53,883 INFO L85 PathProgramCache]: Analyzing trace with hash -609823455, now seen corresponding path program 1 times [2023-08-26 19:01:53,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:01:53,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674831978] [2023-08-26 19:01:53,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:01:53,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:01:53,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:01:54,066 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 19:01:54,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:01:54,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674831978] [2023-08-26 19:01:54,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674831978] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:01:54,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:01:54,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 19:01:54,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874752816] [2023-08-26 19:01:54,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:01:54,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 19:01:54,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:01:54,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 19:01:54,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-26 19:01:54,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 445 [2023-08-26 19:01:54,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 36 transitions, 144 flow. Second operand has 6 states, 6 states have (on average 143.33333333333334) internal successors, (860), 6 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:01:54,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:01:54,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 445 [2023-08-26 19:01:54,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:01:54,110 INFO L124 PetriNetUnfolderBase]: 19/79 cut-off events. [2023-08-26 19:01:54,110 INFO L125 PetriNetUnfolderBase]: For 69/70 co-relation queries the response was YES. [2023-08-26 19:01:54,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 79 events. 19/79 cut-off events. For 69/70 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 197 event pairs, 4 based on Foata normal form. 10/84 useless extension candidates. Maximal degree in co-relation 181. Up to 51 conditions per place. [2023-08-26 19:01:54,111 INFO L140 encePairwiseOnDemand]: 438/445 looper letters, 19 selfloop transitions, 2 changer transitions 10/33 dead transitions. [2023-08-26 19:01:54,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 33 transitions, 201 flow [2023-08-26 19:01:54,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 19:01:54,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 19:01:54,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 591 transitions. [2023-08-26 19:01:54,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33202247191011236 [2023-08-26 19:01:54,113 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 591 transitions. [2023-08-26 19:01:54,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 591 transitions. [2023-08-26 19:01:54,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:01:54,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 591 transitions. [2023-08-26 19:01:54,115 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 147.75) internal successors, (591), 4 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:01:54,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 445.0) internal successors, (2225), 5 states have internal predecessors, (2225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:01:54,118 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 445.0) internal successors, (2225), 5 states have internal predecessors, (2225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:01:54,118 INFO L175 Difference]: Start difference. First operand has 54 places, 36 transitions, 144 flow. Second operand 4 states and 591 transitions. [2023-08-26 19:01:54,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 33 transitions, 201 flow [2023-08-26 19:01:54,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 33 transitions, 196 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 19:01:54,120 INFO L231 Difference]: Finished difference. Result has 50 places, 22 transitions, 112 flow [2023-08-26 19:01:54,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=445, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=50, PETRI_TRANSITIONS=22} [2023-08-26 19:01:54,120 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -20 predicate places. [2023-08-26 19:01:54,120 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 22 transitions, 112 flow [2023-08-26 19:01:54,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 143.33333333333334) internal successors, (860), 6 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:01:54,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:01:54,121 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:01:54,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 19:01:54,121 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr10ASSERT_VIOLATIONASSERT === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 34 more)] === [2023-08-26 19:01:54,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:01:54,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1138285714, now seen corresponding path program 1 times [2023-08-26 19:01:54,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:01:54,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767165492] [2023-08-26 19:01:54,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:01:54,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:01:54,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:01:54,301 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 19:01:54,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:01:54,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767165492] [2023-08-26 19:01:54,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767165492] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:01:54,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65768427] [2023-08-26 19:01:54,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:01:54,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:01:54,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:01:54,305 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 19:01:54,308 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 19:01:54,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:01:54,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 19:01:54,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:01:54,423 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-26 19:01:54,503 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-26 19:01:54,504 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 19:01:54,523 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-26 19:01:54,566 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-26 19:01:54,582 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 19:01:54,582 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:02:04,637 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_272 (Array Int Int)) (|t_funThread1of1ForFork0_~p~0#1.offset| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_272) |c_t_funThread1of1ForFork0_~p~0#1.base|) |t_funThread1of1ForFork0_~p~0#1.offset|) 0)) is different from false [2023-08-26 19:02:04,658 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_272 (Array Int Int)) (|t_funThread1of1ForFork0_~p~0#1.offset| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_272) |c_~#a~0.base|) |t_funThread1of1ForFork0_~p~0#1.offset|) 0)) is different from false [2023-08-26 19:02:04,763 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 1 not checked. [2023-08-26 19:02:04,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65768427] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:02:04,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:02:04,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-08-26 19:02:04,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331645203] [2023-08-26 19:02:04,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:02:04,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 19:02:04,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:02:04,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 19:02:04,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=79, Unknown=6, NotChecked=38, Total=156 [2023-08-26 19:02:04,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 445 [2023-08-26 19:02:04,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 22 transitions, 112 flow. Second operand has 13 states, 13 states have (on average 137.15384615384616) internal successors, (1783), 13 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:02:04,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:02:04,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 445 [2023-08-26 19:02:04,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:02:22,811 WARN L234 SmtUtils]: Spent 16.02s on a formula simplification. DAG size of input: 23 DAG size of output: 18 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 19:02:24,833 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:02:26,837 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:02:28,842 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:02:30,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:02:32,848 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:02:34,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:02:36,910 INFO L124 PetriNetUnfolderBase]: 4/34 cut-off events. [2023-08-26 19:02:36,910 INFO L125 PetriNetUnfolderBase]: For 60/61 co-relation queries the response was YES. [2023-08-26 19:02:36,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126 conditions, 34 events. 4/34 cut-off events. For 60/61 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 45 event pairs, 1 based on Foata normal form. 1/35 useless extension candidates. Maximal degree in co-relation 72. Up to 12 conditions per place. [2023-08-26 19:02:36,910 INFO L140 encePairwiseOnDemand]: 441/445 looper letters, 0 selfloop transitions, 0 changer transitions 22/22 dead transitions. [2023-08-26 19:02:36,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 22 transitions, 151 flow [2023-08-26 19:02:36,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 19:02:36,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 19:02:36,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 686 transitions. [2023-08-26 19:02:36,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.308314606741573 [2023-08-26 19:02:36,913 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 686 transitions. [2023-08-26 19:02:36,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 686 transitions. [2023-08-26 19:02:36,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:02:36,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 686 transitions. [2023-08-26 19:02:36,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 137.2) internal successors, (686), 5 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:02:36,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 445.0) internal successors, (2670), 6 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:02:36,918 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 445.0) internal successors, (2670), 6 states have internal predecessors, (2670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:02:36,918 INFO L175 Difference]: Start difference. First operand has 50 places, 22 transitions, 112 flow. Second operand 5 states and 686 transitions. [2023-08-26 19:02:36,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 22 transitions, 151 flow [2023-08-26 19:02:36,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 22 transitions, 145 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 19:02:36,919 INFO L231 Difference]: Finished difference. Result has 42 places, 0 transitions, 0 flow [2023-08-26 19:02:36,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=445, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=42, PETRI_TRANSITIONS=0} [2023-08-26 19:02:36,920 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -28 predicate places. [2023-08-26 19:02:36,920 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 0 transitions, 0 flow [2023-08-26 19:02:36,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 137.15384615384616) internal successors, (1783), 13 states have internal predecessors, (1783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:02:36,923 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 37 remaining) [2023-08-26 19:02:36,923 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 37 remaining) [2023-08-26 19:02:36,923 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 37 remaining) [2023-08-26 19:02:36,923 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 37 remaining) [2023-08-26 19:02:36,923 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 37 remaining) [2023-08-26 19:02:36,923 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 37 remaining) [2023-08-26 19:02:36,924 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 37 remaining) [2023-08-26 19:02:36,924 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 37 remaining) [2023-08-26 19:02:36,924 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 37 remaining) [2023-08-26 19:02:36,924 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 37 remaining) [2023-08-26 19:02:36,924 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 37 remaining) [2023-08-26 19:02:36,924 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 37 remaining) [2023-08-26 19:02:36,924 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr10ASSERT_VIOLATIONASSERT (24 of 37 remaining) [2023-08-26 19:02:36,924 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 37 remaining) [2023-08-26 19:02:36,924 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 37 remaining) [2023-08-26 19:02:36,925 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 37 remaining) [2023-08-26 19:02:36,925 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 37 remaining) [2023-08-26 19:02:36,925 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 37 remaining) [2023-08-26 19:02:36,925 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 37 remaining) [2023-08-26 19:02:36,925 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 37 remaining) [2023-08-26 19:02:36,925 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 37 remaining) [2023-08-26 19:02:36,925 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 37 remaining) [2023-08-26 19:02:36,925 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 37 remaining) [2023-08-26 19:02:36,926 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 37 remaining) [2023-08-26 19:02:36,926 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 37 remaining) [2023-08-26 19:02:36,926 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 37 remaining) [2023-08-26 19:02:36,926 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 37 remaining) [2023-08-26 19:02:36,926 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 37 remaining) [2023-08-26 19:02:36,926 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 37 remaining) [2023-08-26 19:02:36,926 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12ASSERT_VIOLATIONASSERT (7 of 37 remaining) [2023-08-26 19:02:36,926 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 37 remaining) [2023-08-26 19:02:36,927 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 37 remaining) [2023-08-26 19:02:36,927 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 37 remaining) [2023-08-26 19:02:36,927 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr10ASSERT_VIOLATIONASSERT (3 of 37 remaining) [2023-08-26 19:02:36,927 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 37 remaining) [2023-08-26 19:02:36,927 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 37 remaining) [2023-08-26 19:02:36,927 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 37 remaining) [2023-08-26 19:02:36,936 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 19:02:37,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:02:37,128 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-26 19:02:37,130 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-26 19:02:37,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 228 transitions, 464 flow [2023-08-26 19:02:37,162 INFO L124 PetriNetUnfolderBase]: 48/318 cut-off events. [2023-08-26 19:02:37,162 INFO L125 PetriNetUnfolderBase]: For 1/2 co-relation queries the response was YES. [2023-08-26 19:02:37,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324 conditions, 318 events. 48/318 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1193 event pairs, 0 based on Foata normal form. 0/226 useless extension candidates. Maximal degree in co-relation 180. Up to 8 conditions per place. [2023-08-26 19:02:37,164 INFO L82 GeneralOperation]: Start removeDead. Operand has 198 places, 228 transitions, 464 flow [2023-08-26 19:02:37,166 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 194 places, 223 transitions, 451 flow [2023-08-26 19:02:37,166 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 19:02:37,166 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 194 places, 223 transitions, 451 flow [2023-08-26 19:02:37,171 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 194 places, 223 transitions, 451 flow [2023-08-26 19:02:37,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 194 places, 223 transitions, 451 flow [2023-08-26 19:02:37,194 INFO L124 PetriNetUnfolderBase]: 47/313 cut-off events. [2023-08-26 19:02:37,194 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 19:02:37,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 318 conditions, 313 events. 47/313 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1156 event pairs, 0 based on Foata normal form. 0/221 useless extension candidates. Maximal degree in co-relation 180. Up to 8 conditions per place. [2023-08-26 19:02:37,201 INFO L119 LiptonReduction]: Number of co-enabled transitions 16320 [2023-08-26 19:02:40,547 INFO L134 LiptonReduction]: Checked pairs total: 30163 [2023-08-26 19:02:40,547 INFO L136 LiptonReduction]: Total number of compositions: 214 [2023-08-26 19:02:40,549 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-26 19:02:40,549 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;@6f66cbcf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 19:02:40,549 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-26 19:02:40,553 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 19:02:40,553 INFO L124 PetriNetUnfolderBase]: 12/57 cut-off events. [2023-08-26 19:02:40,553 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 19:02:40,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:02:40,554 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2023-08-26 19:02:40,554 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 19:02:40,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:02:40,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1054683533, now seen corresponding path program 1 times [2023-08-26 19:02:40,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:02:40,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934685695] [2023-08-26 19:02:40,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:02:40,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:02:40,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:02:40,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 19:02:40,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:02:40,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934685695] [2023-08-26 19:02:40,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934685695] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:02:40,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:02:40,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 19:02:40,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339609417] [2023-08-26 19:02:40,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:02:40,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:02:40,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:02:40,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:02:40,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:02:40,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 442 [2023-08-26 19:02:40,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 91 transitions, 187 flow. Second operand has 3 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:02:40,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:02:40,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 442 [2023-08-26 19:02:40,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:02:40,710 INFO L124 PetriNetUnfolderBase]: 542/1246 cut-off events. [2023-08-26 19:02:40,710 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 19:02:40,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2315 conditions, 1246 events. 542/1246 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8118 event pairs, 494 based on Foata normal form. 96/917 useless extension candidates. Maximal degree in co-relation 2243. Up to 1063 conditions per place. [2023-08-26 19:02:40,713 INFO L140 encePairwiseOnDemand]: 410/442 looper letters, 27 selfloop transitions, 2 changer transitions 26/63 dead transitions. [2023-08-26 19:02:40,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 63 transitions, 231 flow [2023-08-26 19:02:40,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:02:40,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:02:40,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 641 transitions. [2023-08-26 19:02:40,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48340874811463047 [2023-08-26 19:02:40,716 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 641 transitions. [2023-08-26 19:02:40,716 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 641 transitions. [2023-08-26 19:02:40,716 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:02:40,716 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 641 transitions. [2023-08-26 19:02:40,717 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:02:40,719 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 442.0) internal successors, (1768), 4 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:02:40,720 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 442.0) internal successors, (1768), 4 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:02:40,720 INFO L175 Difference]: Start difference. First operand has 69 places, 91 transitions, 187 flow. Second operand 3 states and 641 transitions. [2023-08-26 19:02:40,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 63 transitions, 231 flow [2023-08-26 19:02:40,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 63 transitions, 231 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 19:02:40,721 INFO L231 Difference]: Finished difference. Result has 65 places, 37 transitions, 89 flow [2023-08-26 19:02:40,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=442, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=89, PETRI_PLACES=65, PETRI_TRANSITIONS=37} [2023-08-26 19:02:40,722 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -4 predicate places. [2023-08-26 19:02:40,722 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 37 transitions, 89 flow [2023-08-26 19:02:40,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:02:40,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:02:40,730 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-26 19:02:40,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 19:02:40,731 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 19:02:40,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:02:40,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1716647263, now seen corresponding path program 1 times [2023-08-26 19:02:40,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:02:40,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674436701] [2023-08-26 19:02:40,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:02:40,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:02:40,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:02:40,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 19:02:40,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:02:40,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674436701] [2023-08-26 19:02:40,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674436701] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:02:40,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503296131] [2023-08-26 19:02:40,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:02:40,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:02:40,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:02:40,764 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 19:02:40,777 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 19:02:40,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:02:40,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-26 19:02:40,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:02:40,854 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 19:02:40,854 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:02:40,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 19:02:40,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503296131] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:02:40,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:02:40,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-26 19:02:40,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65725326] [2023-08-26 19:02:40,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:02:40,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 19:02:40,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:02:40,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 19:02:40,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-26 19:02:40,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 442 [2023-08-26 19:02:40,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 37 transitions, 89 flow. Second operand has 7 states, 7 states have (on average 188.57142857142858) internal successors, (1320), 7 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:02:40,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:02:40,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 442 [2023-08-26 19:02:40,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:02:40,931 INFO L124 PetriNetUnfolderBase]: 102/269 cut-off events. [2023-08-26 19:02:40,931 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 19:02:40,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 511 conditions, 269 events. 102/269 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1146 event pairs, 95 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 499. Up to 223 conditions per place. [2023-08-26 19:02:40,932 INFO L140 encePairwiseOnDemand]: 439/442 looper letters, 27 selfloop transitions, 5 changer transitions 0/40 dead transitions. [2023-08-26 19:02:40,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 40 transitions, 165 flow [2023-08-26 19:02:40,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 19:02:40,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 19:02:40,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1157 transitions. [2023-08-26 19:02:40,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4362745098039216 [2023-08-26 19:02:40,935 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1157 transitions. [2023-08-26 19:02:40,935 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1157 transitions. [2023-08-26 19:02:40,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:02:40,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1157 transitions. [2023-08-26 19:02:40,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 192.83333333333334) internal successors, (1157), 6 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:02:40,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 442.0) internal successors, (3094), 7 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:02:40,941 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 442.0) internal successors, (3094), 7 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:02:40,941 INFO L175 Difference]: Start difference. First operand has 65 places, 37 transitions, 89 flow. Second operand 6 states and 1157 transitions. [2023-08-26 19:02:40,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 40 transitions, 165 flow [2023-08-26 19:02:40,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 40 transitions, 161 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-26 19:02:40,942 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 121 flow [2023-08-26 19:02:40,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=442, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=121, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2023-08-26 19:02:40,943 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -22 predicate places. [2023-08-26 19:02:40,943 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 121 flow [2023-08-26 19:02:40,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 188.57142857142858) internal successors, (1320), 7 states have internal predecessors, (1320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:02:40,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:02:40,944 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1] [2023-08-26 19:02:40,953 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 19:02:41,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-26 19:02:41,150 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 19:02:41,150 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:02:41,150 INFO L85 PathProgramCache]: Analyzing trace with hash -673671667, now seen corresponding path program 2 times [2023-08-26 19:02:41,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:02:41,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561731482] [2023-08-26 19:02:41,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:02:41,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:02:41,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:02:41,212 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 19:02:41,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:02:41,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561731482] [2023-08-26 19:02:41,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561731482] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:02:41,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505246270] [2023-08-26 19:02:41,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 19:02:41,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:02:41,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:02:41,215 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 19:02:41,238 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 19:02:41,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 19:02:41,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:02:41,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 19:02:41,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:02:41,321 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 19:02:41,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:02:41,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 19:02:41,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505246270] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:02:41,370 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:02:41,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-26 19:02:41,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054002144] [2023-08-26 19:02:41,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:02:41,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 19:02:41,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:02:41,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 19:02:41,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-26 19:02:41,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 442 [2023-08-26 19:02:41,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 121 flow. Second operand has 13 states, 13 states have (on average 188.30769230769232) internal successors, (2448), 13 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:02:41,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:02:41,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 442 [2023-08-26 19:02:41,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:02:41,489 INFO L124 PetriNetUnfolderBase]: 102/275 cut-off events. [2023-08-26 19:02:41,489 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-26 19:02:41,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 548 conditions, 275 events. 102/275 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1146 event pairs, 95 based on Foata normal form. 6/176 useless extension candidates. Maximal degree in co-relation 490. Up to 223 conditions per place. [2023-08-26 19:02:41,490 INFO L140 encePairwiseOnDemand]: 439/442 looper letters, 27 selfloop transitions, 11 changer transitions 0/46 dead transitions. [2023-08-26 19:02:41,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 46 transitions, 233 flow [2023-08-26 19:02:41,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 19:02:41,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 19:02:41,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2288 transitions. [2023-08-26 19:02:41,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43137254901960786 [2023-08-26 19:02:41,496 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2288 transitions. [2023-08-26 19:02:41,496 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2288 transitions. [2023-08-26 19:02:41,497 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:02:41,497 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2288 transitions. [2023-08-26 19:02:41,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 190.66666666666666) internal successors, (2288), 12 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:02:41,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 442.0) internal successors, (5746), 13 states have internal predecessors, (5746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:02:41,508 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 442.0) internal successors, (5746), 13 states have internal predecessors, (5746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:02:41,509 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 121 flow. Second operand 12 states and 2288 transitions. [2023-08-26 19:02:41,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 46 transitions, 233 flow [2023-08-26 19:02:41,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 46 transitions, 219 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-26 19:02:41,510 INFO L231 Difference]: Finished difference. Result has 63 places, 46 transitions, 191 flow [2023-08-26 19:02:41,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=442, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=191, PETRI_PLACES=63, PETRI_TRANSITIONS=46} [2023-08-26 19:02:41,512 INFO L281 CegarLoopForPetriNet]: 69 programPoint places, -6 predicate places. [2023-08-26 19:02:41,512 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 46 transitions, 191 flow [2023-08-26 19:02:41,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 188.30769230769232) internal successors, (2448), 13 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:02:41,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:02:41,513 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-08-26 19:02:41,526 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 19:02:41,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:02:41,718 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-26 19:02:41,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:02:41,719 INFO L85 PathProgramCache]: Analyzing trace with hash -2010647347, now seen corresponding path program 3 times [2023-08-26 19:02:41,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:02:41,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582938724] [2023-08-26 19:02:41,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:02:41,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:02:41,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 19:02:41,743 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 19:02:41,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 19:02:41,772 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 19:02:41,772 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 19:02:41,773 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 1 remaining) [2023-08-26 19:02:41,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 19:02:41,773 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-08-26 19:02:41,773 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE (2/2) [2023-08-26 19:02:41,774 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 19:02:41,774 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-26 19:02:41,807 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 19:02:41,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 272 places, 315 transitions, 648 flow [2023-08-26 19:02:41,859 INFO L124 PetriNetUnfolderBase]: 80/522 cut-off events. [2023-08-26 19:02:41,859 INFO L125 PetriNetUnfolderBase]: For 6/8 co-relation queries the response was YES. [2023-08-26 19:02:41,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 536 conditions, 522 events. 80/522 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2395 event pairs, 0 based on Foata normal form. 0/369 useless extension candidates. Maximal degree in co-relation 320. Up to 12 conditions per place. [2023-08-26 19:02:41,865 INFO L82 GeneralOperation]: Start removeDead. Operand has 272 places, 315 transitions, 648 flow [2023-08-26 19:02:41,871 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 272 places, 315 transitions, 648 flow [2023-08-26 19:02:41,871 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 19:02:41,871 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 272 places, 315 transitions, 648 flow [2023-08-26 19:02:41,871 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 272 places, 315 transitions, 648 flow [2023-08-26 19:02:41,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 272 places, 315 transitions, 648 flow [2023-08-26 19:02:41,924 INFO L124 PetriNetUnfolderBase]: 80/522 cut-off events. [2023-08-26 19:02:41,924 INFO L125 PetriNetUnfolderBase]: For 6/8 co-relation queries the response was YES. [2023-08-26 19:02:41,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 536 conditions, 522 events. 80/522 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2395 event pairs, 0 based on Foata normal form. 0/369 useless extension candidates. Maximal degree in co-relation 320. Up to 12 conditions per place. [2023-08-26 19:02:41,949 INFO L119 LiptonReduction]: Number of co-enabled transitions 48960 [2023-08-26 19:02:45,970 INFO L134 LiptonReduction]: Checked pairs total: 88602 [2023-08-26 19:02:45,970 INFO L136 LiptonReduction]: Total number of compositions: 292 [2023-08-26 19:02:45,971 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 19:02:45,972 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;@6f66cbcf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 19:02:45,972 INFO L358 AbstractCegarLoop]: Starting to check reachability of 48 error locations. [2023-08-26 19:02:45,973 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 19:02:45,973 INFO L124 PetriNetUnfolderBase]: 1/3 cut-off events. [2023-08-26 19:02:45,973 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 19:02:45,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:02:45,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 19:02:45,973 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-26 19:02:45,974 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:02:45,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1812240, now seen corresponding path program 1 times [2023-08-26 19:02:45,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:02:45,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860445322] [2023-08-26 19:02:45,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:02:45,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:02:45,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:02:45,990 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 19:02:45,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:02:45,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860445322] [2023-08-26 19:02:45,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860445322] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:02:45,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:02:45,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 19:02:45,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578240717] [2023-08-26 19:02:45,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:02:45,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:02:45,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:02:45,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:02:45,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:02:45,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 607 [2023-08-26 19:02:45,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 134 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 259.0) internal successors, (777), 3 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:02:45,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:02:45,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 607 [2023-08-26 19:02:45,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:02:48,870 INFO L124 PetriNetUnfolderBase]: 22825/38051 cut-off events. [2023-08-26 19:02:48,871 INFO L125 PetriNetUnfolderBase]: For 132/132 co-relation queries the response was YES. [2023-08-26 19:02:48,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71674 conditions, 38051 events. 22825/38051 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 1551. Compared 320771 event pairs, 21546 based on Foata normal form. 3152/29199 useless extension candidates. Maximal degree in co-relation 30523. Up to 33499 conditions per place. [2023-08-26 19:02:49,092 INFO L140 encePairwiseOnDemand]: 565/607 looper letters, 72 selfloop transitions, 2 changer transitions 0/96 dead transitions. [2023-08-26 19:02:49,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 96 transitions, 358 flow [2023-08-26 19:02:49,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:02:49,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:02:49,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 888 transitions. [2023-08-26 19:02:49,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4876441515650741 [2023-08-26 19:02:49,095 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 888 transitions. [2023-08-26 19:02:49,095 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 888 transitions. [2023-08-26 19:02:49,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:02:49,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 888 transitions. [2023-08-26 19:02:49,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 296.0) internal successors, (888), 3 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:02:49,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:02:49,100 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:02:49,100 INFO L175 Difference]: Start difference. First operand has 102 places, 134 transitions, 286 flow. Second operand 3 states and 888 transitions. [2023-08-26 19:02:49,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 96 transitions, 358 flow [2023-08-26 19:02:49,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 96 transitions, 358 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 19:02:49,103 INFO L231 Difference]: Finished difference. Result has 97 places, 96 transitions, 220 flow [2023-08-26 19:02:49,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=97, PETRI_TRANSITIONS=96} [2023-08-26 19:02:49,104 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -5 predicate places. [2023-08-26 19:02:49,104 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 96 transitions, 220 flow [2023-08-26 19:02:49,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 259.0) internal successors, (777), 3 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:02:49,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:02:49,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 19:02:49,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 19:02:49,105 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-26 19:02:49,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:02:49,105 INFO L85 PathProgramCache]: Analyzing trace with hash 56140452, now seen corresponding path program 1 times [2023-08-26 19:02:49,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:02:49,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785536481] [2023-08-26 19:02:49,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:02:49,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:02:49,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:02:49,137 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 19:02:49,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:02:49,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785536481] [2023-08-26 19:02:49,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785536481] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:02:49,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743590672] [2023-08-26 19:02:49,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:02:49,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:02:49,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:02:49,141 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 19:02:49,173 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 19:02:49,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:02:49,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-26 19:02:49,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:02:49,235 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 19:02:49,235 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:02:49,245 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 19:02:49,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743590672] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:02:49,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:02:49,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-26 19:02:49,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437326371] [2023-08-26 19:02:49,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:02:49,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 19:02:49,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:02:49,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 19:02:49,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-26 19:02:49,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 607 [2023-08-26 19:02:49,249 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 96 transitions, 220 flow. Second operand has 6 states, 6 states have (on average 259.1666666666667) internal successors, (1555), 6 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:02:49,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:02:49,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 607 [2023-08-26 19:02:49,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:02:51,383 INFO L124 PetriNetUnfolderBase]: 22825/38054 cut-off events. [2023-08-26 19:02:51,384 INFO L125 PetriNetUnfolderBase]: For 132/132 co-relation queries the response was YES. [2023-08-26 19:02:51,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71690 conditions, 38054 events. 22825/38054 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 1551. Compared 320745 event pairs, 21546 based on Foata normal form. 0/26050 useless extension candidates. Maximal degree in co-relation 71677. Up to 33499 conditions per place. [2023-08-26 19:02:51,666 INFO L140 encePairwiseOnDemand]: 604/607 looper letters, 72 selfloop transitions, 5 changer transitions 0/99 dead transitions. [2023-08-26 19:02:51,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 99 transitions, 386 flow [2023-08-26 19:02:51,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 19:02:51,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 19:02:51,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1628 transitions. [2023-08-26 19:02:51,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44700713893465127 [2023-08-26 19:02:51,671 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1628 transitions. [2023-08-26 19:02:51,671 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1628 transitions. [2023-08-26 19:02:51,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:02:51,672 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1628 transitions. [2023-08-26 19:02:51,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 271.3333333333333) internal successors, (1628), 6 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:02:51,679 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 607.0) internal successors, (4249), 7 states have internal predecessors, (4249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:02:51,680 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 607.0) internal successors, (4249), 7 states have internal predecessors, (4249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:02:51,680 INFO L175 Difference]: Start difference. First operand has 97 places, 96 transitions, 220 flow. Second operand 6 states and 1628 transitions. [2023-08-26 19:02:51,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 99 transitions, 386 flow [2023-08-26 19:02:51,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 99 transitions, 382 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-26 19:02:51,683 INFO L231 Difference]: Finished difference. Result has 104 places, 99 transitions, 252 flow [2023-08-26 19:02:51,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=252, PETRI_PLACES=104, PETRI_TRANSITIONS=99} [2023-08-26 19:02:51,685 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 2 predicate places. [2023-08-26 19:02:51,685 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 99 transitions, 252 flow [2023-08-26 19:02:51,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 259.1666666666667) internal successors, (1555), 6 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:02:51,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:02:51,685 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-26 19:02:51,691 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 19:02:51,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:02:51,891 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-26 19:02:51,891 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:02:51,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1699243087, now seen corresponding path program 2 times [2023-08-26 19:02:51,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:02:51,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526434716] [2023-08-26 19:02:51,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:02:51,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:02:51,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:02:51,944 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 19:02:51,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:02:51,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526434716] [2023-08-26 19:02:51,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526434716] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:02:51,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582272438] [2023-08-26 19:02:51,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 19:02:51,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:02:51,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:02:51,949 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 19:02:51,953 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 19:02:52,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-26 19:02:52,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:02:52,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-26 19:02:52,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:02:52,041 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 19:02:52,053 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-26 19:02:52,054 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 19:02:52,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582272438] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:02:52,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 19:02:52,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2023-08-26 19:02:52,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157416796] [2023-08-26 19:02:52,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:02:52,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:02:52,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:02:52,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:02:52,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-26 19:02:52,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 607 [2023-08-26 19:02:52,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 99 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 217.33333333333334) internal successors, (652), 3 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:02:52,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:02:52,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 607 [2023-08-26 19:02:52,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:02:54,535 INFO L124 PetriNetUnfolderBase]: 24498/40388 cut-off events. [2023-08-26 19:02:54,535 INFO L125 PetriNetUnfolderBase]: For 103/103 co-relation queries the response was YES. [2023-08-26 19:02:54,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76998 conditions, 40388 events. 24498/40388 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 1558. Compared 335167 event pairs, 11286 based on Foata normal form. 0/28212 useless extension candidates. Maximal degree in co-relation 76963. Up to 36410 conditions per place. [2023-08-26 19:02:54,746 INFO L140 encePairwiseOnDemand]: 603/607 looper letters, 100 selfloop transitions, 2 changer transitions 0/122 dead transitions. [2023-08-26 19:02:54,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 122 transitions, 502 flow [2023-08-26 19:02:54,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:02:54,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:02:54,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 748 transitions. [2023-08-26 19:02:54,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41076331685886874 [2023-08-26 19:02:54,749 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 748 transitions. [2023-08-26 19:02:54,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 748 transitions. [2023-08-26 19:02:54,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:02:54,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 748 transitions. [2023-08-26 19:02:54,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 249.33333333333334) internal successors, (748), 3 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:02:54,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:02:54,754 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:02:54,754 INFO L175 Difference]: Start difference. First operand has 104 places, 99 transitions, 252 flow. Second operand 3 states and 748 transitions. [2023-08-26 19:02:54,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 122 transitions, 502 flow [2023-08-26 19:02:54,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 122 transitions, 488 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-26 19:02:54,757 INFO L231 Difference]: Finished difference. Result has 106 places, 100 transitions, 252 flow [2023-08-26 19:02:54,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=252, PETRI_PLACES=106, PETRI_TRANSITIONS=100} [2023-08-26 19:02:54,757 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 4 predicate places. [2023-08-26 19:02:54,758 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 100 transitions, 252 flow [2023-08-26 19:02:54,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.33333333333334) internal successors, (652), 3 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:02:54,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:02:54,758 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-26 19:02:54,767 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-26 19:02:54,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-26 19:02:54,963 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-26 19:02:54,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:02:54,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1699243088, now seen corresponding path program 1 times [2023-08-26 19:02:54,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:02:54,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348260878] [2023-08-26 19:02:54,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:02:54,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:02:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:02:54,996 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-26 19:02:54,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:02:54,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348260878] [2023-08-26 19:02:54,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348260878] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:02:54,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:02:54,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 19:02:54,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907104108] [2023-08-26 19:02:54,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:02:54,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 19:02:54,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:02:54,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 19:02:54,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 19:02:54,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 607 [2023-08-26 19:02:54,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 100 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:02:54,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:02:54,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 607 [2023-08-26 19:02:54,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:02:57,985 INFO L124 PetriNetUnfolderBase]: 32924/50770 cut-off events. [2023-08-26 19:02:57,986 INFO L125 PetriNetUnfolderBase]: For 1417/1417 co-relation queries the response was YES. [2023-08-26 19:02:58,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101161 conditions, 50770 events. 32924/50770 cut-off events. For 1417/1417 co-relation queries the response was YES. Maximal size of possible extension queue 1881. Compared 392743 event pairs, 30067 based on Foata normal form. 0/32002 useless extension candidates. Maximal degree in co-relation 101131. Up to 46470 conditions per place. [2023-08-26 19:02:58,218 INFO L140 encePairwiseOnDemand]: 603/607 looper letters, 131 selfloop transitions, 2 changer transitions 0/145 dead transitions. [2023-08-26 19:02:58,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 145 transitions, 608 flow [2023-08-26 19:02:58,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 19:02:58,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 19:02:58,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 793 transitions. [2023-08-26 19:02:58,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4354750137287205 [2023-08-26 19:02:58,221 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 793 transitions. [2023-08-26 19:02:58,221 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 793 transitions. [2023-08-26 19:02:58,221 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:02:58,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 793 transitions. [2023-08-26 19:02:58,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 264.3333333333333) internal successors, (793), 3 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:02:58,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:02:58,226 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 607.0) internal successors, (2428), 4 states have internal predecessors, (2428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:02:58,226 INFO L175 Difference]: Start difference. First operand has 106 places, 100 transitions, 252 flow. Second operand 3 states and 793 transitions. [2023-08-26 19:02:58,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 145 transitions, 608 flow [2023-08-26 19:02:58,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 145 transitions, 606 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:02:58,230 INFO L231 Difference]: Finished difference. Result has 105 places, 98 transitions, 250 flow [2023-08-26 19:02:58,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=250, PETRI_PLACES=105, PETRI_TRANSITIONS=98} [2023-08-26 19:02:58,231 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 3 predicate places. [2023-08-26 19:02:58,231 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 98 transitions, 250 flow [2023-08-26 19:02:58,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:02:58,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:02:58,231 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:02:58,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-26 19:02:58,232 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-26 19:02:58,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:02:58,232 INFO L85 PathProgramCache]: Analyzing trace with hash 159936679, now seen corresponding path program 1 times [2023-08-26 19:02:58,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:02:58,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967467562] [2023-08-26 19:02:58,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:02:58,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:02:58,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:02:58,287 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 19:02:58,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:02:58,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967467562] [2023-08-26 19:02:58,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967467562] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:02:58,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571727432] [2023-08-26 19:02:58,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:02:58,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:02:58,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:02:58,293 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 19:02:58,318 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 19:02:58,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:02:58,389 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 19:02:58,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:02:58,403 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 19:02:58,403 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:02:58,445 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 19:02:58,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571727432] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:02:58,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:02:58,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-26 19:02:58,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926586435] [2023-08-26 19:02:58,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:02:58,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-26 19:02:58,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:02:58,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-26 19:02:58,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-08-26 19:02:58,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 607 [2023-08-26 19:02:58,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 98 transitions, 250 flow. Second operand has 12 states, 12 states have (on average 259.4166666666667) internal successors, (3113), 12 states have internal predecessors, (3113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:02:58,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:02:58,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 607 [2023-08-26 19:02:58,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:03:00,602 INFO L124 PetriNetUnfolderBase]: 21275/34941 cut-off events. [2023-08-26 19:03:00,602 INFO L125 PetriNetUnfolderBase]: For 1244/1244 co-relation queries the response was YES. [2023-08-26 19:03:00,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67847 conditions, 34941 events. 21275/34941 cut-off events. For 1244/1244 co-relation queries the response was YES. Maximal size of possible extension queue 1443. Compared 287031 event pairs, 19969 based on Foata normal form. 6/25299 useless extension candidates. Maximal degree in co-relation 67793. Up to 31040 conditions per place. [2023-08-26 19:03:00,767 INFO L140 encePairwiseOnDemand]: 604/607 looper letters, 71 selfloop transitions, 11 changer transitions 0/104 dead transitions. [2023-08-26 19:03:00,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 104 transitions, 450 flow [2023-08-26 19:03:00,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 19:03:00,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 19:03:00,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3183 transitions. [2023-08-26 19:03:00,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4369851729818781 [2023-08-26 19:03:00,774 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3183 transitions. [2023-08-26 19:03:00,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3183 transitions. [2023-08-26 19:03:00,776 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:03:00,776 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3183 transitions. [2023-08-26 19:03:00,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 265.25) internal successors, (3183), 12 states have internal predecessors, (3183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:00,790 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 607.0) internal successors, (7891), 13 states have internal predecessors, (7891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:00,791 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 607.0) internal successors, (7891), 13 states have internal predecessors, (7891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:00,791 INFO L175 Difference]: Start difference. First operand has 105 places, 98 transitions, 250 flow. Second operand 12 states and 3183 transitions. [2023-08-26 19:03:00,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 104 transitions, 450 flow [2023-08-26 19:03:00,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 104 transitions, 446 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 19:03:00,818 INFO L231 Difference]: Finished difference. Result has 120 places, 104 transitions, 330 flow [2023-08-26 19:03:00,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=330, PETRI_PLACES=120, PETRI_TRANSITIONS=104} [2023-08-26 19:03:00,818 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 18 predicate places. [2023-08-26 19:03:00,819 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 104 transitions, 330 flow [2023-08-26 19:03:00,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 259.4166666666667) internal successors, (3113), 12 states have internal predecessors, (3113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:00,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:03:00,819 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:03:00,827 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 19:03:01,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:03:01,024 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-26 19:03:01,025 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:03:01,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1974235271, now seen corresponding path program 2 times [2023-08-26 19:03:01,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:03:01,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809663828] [2023-08-26 19:03:01,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:03:01,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:03:01,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:03:01,244 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 19:03:01,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:03:01,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809663828] [2023-08-26 19:03:01,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809663828] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:03:01,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:03:01,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 19:03:01,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116922987] [2023-08-26 19:03:01,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:03:01,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 19:03:01,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:03:01,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 19:03:01,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-26 19:03:01,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 607 [2023-08-26 19:03:01,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 104 transitions, 330 flow. Second operand has 6 states, 6 states have (on average 198.33333333333334) internal successors, (1190), 6 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:01,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:03:01,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 607 [2023-08-26 19:03:01,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:03:04,075 INFO L124 PetriNetUnfolderBase]: 25315/38913 cut-off events. [2023-08-26 19:03:04,075 INFO L125 PetriNetUnfolderBase]: For 1231/1231 co-relation queries the response was YES. [2023-08-26 19:03:04,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78483 conditions, 38913 events. 25315/38913 cut-off events. For 1231/1231 co-relation queries the response was YES. Maximal size of possible extension queue 1422. Compared 289573 event pairs, 10261 based on Foata normal form. 0/26546 useless extension candidates. Maximal degree in co-relation 78405. Up to 35011 conditions per place. [2023-08-26 19:03:04,303 INFO L140 encePairwiseOnDemand]: 597/607 looper letters, 197 selfloop transitions, 6 changer transitions 0/215 dead transitions. [2023-08-26 19:03:04,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 215 transitions, 974 flow [2023-08-26 19:03:04,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 19:03:04,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 19:03:04,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1385 transitions. [2023-08-26 19:03:04,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38028555738605163 [2023-08-26 19:03:04,307 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1385 transitions. [2023-08-26 19:03:04,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1385 transitions. [2023-08-26 19:03:04,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:03:04,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1385 transitions. [2023-08-26 19:03:04,310 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 230.83333333333334) internal successors, (1385), 6 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:04,314 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 607.0) internal successors, (4249), 7 states have internal predecessors, (4249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:04,314 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 607.0) internal successors, (4249), 7 states have internal predecessors, (4249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:04,315 INFO L175 Difference]: Start difference. First operand has 120 places, 104 transitions, 330 flow. Second operand 6 states and 1385 transitions. [2023-08-26 19:03:04,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 215 transitions, 974 flow [2023-08-26 19:03:04,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 215 transitions, 926 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-26 19:03:04,319 INFO L231 Difference]: Finished difference. Result has 114 places, 100 transitions, 286 flow [2023-08-26 19:03:04,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=286, PETRI_PLACES=114, PETRI_TRANSITIONS=100} [2023-08-26 19:03:04,320 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 12 predicate places. [2023-08-26 19:03:04,320 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 100 transitions, 286 flow [2023-08-26 19:03:04,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 198.33333333333334) internal successors, (1190), 6 states have internal predecessors, (1190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:04,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:03:04,321 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:03:04,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-26 19:03:04,321 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-26 19:03:04,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:03:04,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1973658177, now seen corresponding path program 1 times [2023-08-26 19:03:04,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:03:04,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561916450] [2023-08-26 19:03:04,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:03:04,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:03:04,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:03:04,398 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 19:03:04,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:03:04,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561916450] [2023-08-26 19:03:04,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561916450] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:03:04,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80887295] [2023-08-26 19:03:04,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:03:04,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:03:04,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:03:04,400 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 19:03:04,431 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 19:03:04,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:03:04,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 19:03:04,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:03:04,518 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 19:03:04,546 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 19:03:04,546 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:03:04,578 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 19:03:04,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80887295] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:03:04,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:03:04,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-26 19:03:04,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942118315] [2023-08-26 19:03:04,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:03:04,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 19:03:04,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:03:04,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 19:03:04,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-26 19:03:04,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 607 [2023-08-26 19:03:04,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 100 transitions, 286 flow. Second operand has 7 states, 7 states have (on average 218.0) internal successors, (1526), 7 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:04,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:03:04,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 607 [2023-08-26 19:03:04,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:03:06,536 INFO L124 PetriNetUnfolderBase]: 15939/26092 cut-off events. [2023-08-26 19:03:06,536 INFO L125 PetriNetUnfolderBase]: For 1309/1309 co-relation queries the response was YES. [2023-08-26 19:03:06,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52658 conditions, 26092 events. 15939/26092 cut-off events. For 1309/1309 co-relation queries the response was YES. Maximal size of possible extension queue 942. Compared 202031 event pairs, 1 based on Foata normal form. 18/21131 useless extension candidates. Maximal degree in co-relation 52603. Up to 21229 conditions per place. [2023-08-26 19:03:06,692 INFO L140 encePairwiseOnDemand]: 603/607 looper letters, 166 selfloop transitions, 4 changer transitions 0/190 dead transitions. [2023-08-26 19:03:06,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 190 transitions, 810 flow [2023-08-26 19:03:06,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 19:03:06,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 19:03:06,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1241 transitions. [2023-08-26 19:03:06,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40889621087314665 [2023-08-26 19:03:06,694 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1241 transitions. [2023-08-26 19:03:06,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1241 transitions. [2023-08-26 19:03:06,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:03:06,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1241 transitions. [2023-08-26 19:03:06,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 248.2) internal successors, (1241), 5 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:06,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 607.0) internal successors, (3642), 6 states have internal predecessors, (3642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:06,701 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 607.0) internal successors, (3642), 6 states have internal predecessors, (3642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:06,701 INFO L175 Difference]: Start difference. First operand has 114 places, 100 transitions, 286 flow. Second operand 5 states and 1241 transitions. [2023-08-26 19:03:06,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 190 transitions, 810 flow [2023-08-26 19:03:06,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 190 transitions, 809 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:03:06,709 INFO L231 Difference]: Finished difference. Result has 116 places, 99 transitions, 289 flow [2023-08-26 19:03:06,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=289, PETRI_PLACES=116, PETRI_TRANSITIONS=99} [2023-08-26 19:03:06,710 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 14 predicate places. [2023-08-26 19:03:06,710 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 99 transitions, 289 flow [2023-08-26 19:03:06,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 218.0) internal successors, (1526), 7 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:06,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:03:06,711 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:03:06,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-26 19:03:06,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-08-26 19:03:06,916 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-26 19:03:06,916 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:03:06,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1071750305, now seen corresponding path program 1 times [2023-08-26 19:03:06,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:03:06,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493488224] [2023-08-26 19:03:06,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:03:06,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:03:06,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:03:07,042 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 19:03:07,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:03:07,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493488224] [2023-08-26 19:03:07,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493488224] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:03:07,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:03:07,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 19:03:07,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142710263] [2023-08-26 19:03:07,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:03:07,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 19:03:07,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:03:07,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 19:03:07,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-26 19:03:07,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 202 out of 607 [2023-08-26 19:03:07,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 99 transitions, 289 flow. Second operand has 6 states, 6 states have (on average 203.5) internal successors, (1221), 6 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:07,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:03:07,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 202 of 607 [2023-08-26 19:03:07,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:03:09,002 INFO L124 PetriNetUnfolderBase]: 18559/29225 cut-off events. [2023-08-26 19:03:09,003 INFO L125 PetriNetUnfolderBase]: For 3601/3601 co-relation queries the response was YES. [2023-08-26 19:03:09,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60057 conditions, 29225 events. 18559/29225 cut-off events. For 3601/3601 co-relation queries the response was YES. Maximal size of possible extension queue 1104. Compared 233365 event pairs, 498 based on Foata normal form. 0/22594 useless extension candidates. Maximal degree in co-relation 60002. Up to 25025 conditions per place. [2023-08-26 19:03:09,187 INFO L140 encePairwiseOnDemand]: 593/607 looper letters, 194 selfloop transitions, 10 changer transitions 0/216 dead transitions. [2023-08-26 19:03:09,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 216 transitions, 951 flow [2023-08-26 19:03:09,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 19:03:09,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 19:03:09,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1210 transitions. [2023-08-26 19:03:09,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3986820428336079 [2023-08-26 19:03:09,189 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1210 transitions. [2023-08-26 19:03:09,189 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1210 transitions. [2023-08-26 19:03:09,190 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:03:09,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1210 transitions. [2023-08-26 19:03:09,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 242.0) internal successors, (1210), 5 states have internal predecessors, (1210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:09,196 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 607.0) internal successors, (3642), 6 states have internal predecessors, (3642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:09,196 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 607.0) internal successors, (3642), 6 states have internal predecessors, (3642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:09,196 INFO L175 Difference]: Start difference. First operand has 116 places, 99 transitions, 289 flow. Second operand 5 states and 1210 transitions. [2023-08-26 19:03:09,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 216 transitions, 951 flow [2023-08-26 19:03:09,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 216 transitions, 934 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-26 19:03:09,202 INFO L231 Difference]: Finished difference. Result has 120 places, 105 transitions, 356 flow [2023-08-26 19:03:09,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=356, PETRI_PLACES=120, PETRI_TRANSITIONS=105} [2023-08-26 19:03:09,202 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 18 predicate places. [2023-08-26 19:03:09,202 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 105 transitions, 356 flow [2023-08-26 19:03:09,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 203.5) internal successors, (1221), 6 states have internal predecessors, (1221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:09,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:03:09,203 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:03:09,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-08-26 19:03:09,203 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr10ASSERT_VIOLATIONASSERT === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-26 19:03:09,203 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:03:09,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1071750694, now seen corresponding path program 1 times [2023-08-26 19:03:09,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:03:09,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522940494] [2023-08-26 19:03:09,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:03:09,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:03:09,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:03:09,355 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 19:03:09,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:03:09,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522940494] [2023-08-26 19:03:09,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522940494] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:03:09,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:03:09,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 19:03:09,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436350013] [2023-08-26 19:03:09,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:03:09,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 19:03:09,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:03:09,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 19:03:09,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-26 19:03:09,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 607 [2023-08-26 19:03:09,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 105 transitions, 356 flow. Second operand has 6 states, 6 states have (on average 196.5) internal successors, (1179), 6 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:09,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:03:09,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 607 [2023-08-26 19:03:09,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:03:12,865 INFO L124 PetriNetUnfolderBase]: 26962/43199 cut-off events. [2023-08-26 19:03:12,866 INFO L125 PetriNetUnfolderBase]: For 11373/11373 co-relation queries the response was YES. [2023-08-26 19:03:13,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94232 conditions, 43199 events. 26962/43199 cut-off events. For 11373/11373 co-relation queries the response was YES. Maximal size of possible extension queue 1533. Compared 352296 event pairs, 5840 based on Foata normal form. 0/33862 useless extension candidates. Maximal degree in co-relation 94174. Up to 23708 conditions per place. [2023-08-26 19:03:13,116 INFO L140 encePairwiseOnDemand]: 594/607 looper letters, 265 selfloop transitions, 29 changer transitions 0/306 dead transitions. [2023-08-26 19:03:13,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 306 transitions, 1479 flow [2023-08-26 19:03:13,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 19:03:13,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 19:03:13,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1639 transitions. [2023-08-26 19:03:13,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38573782066368556 [2023-08-26 19:03:13,118 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1639 transitions. [2023-08-26 19:03:13,118 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1639 transitions. [2023-08-26 19:03:13,118 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:03:13,118 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1639 transitions. [2023-08-26 19:03:13,120 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 234.14285714285714) internal successors, (1639), 7 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:13,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 607.0) internal successors, (4856), 8 states have internal predecessors, (4856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:13,125 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 607.0) internal successors, (4856), 8 states have internal predecessors, (4856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:13,125 INFO L175 Difference]: Start difference. First operand has 120 places, 105 transitions, 356 flow. Second operand 7 states and 1639 transitions. [2023-08-26 19:03:13,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 306 transitions, 1479 flow [2023-08-26 19:03:13,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 306 transitions, 1468 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 19:03:13,185 INFO L231 Difference]: Finished difference. Result has 129 places, 132 transitions, 586 flow [2023-08-26 19:03:13,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=586, PETRI_PLACES=129, PETRI_TRANSITIONS=132} [2023-08-26 19:03:13,185 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 27 predicate places. [2023-08-26 19:03:13,185 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 132 transitions, 586 flow [2023-08-26 19:03:13,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 196.5) internal successors, (1179), 6 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:13,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:03:13,186 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:03:13,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-08-26 19:03:13,186 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-26 19:03:13,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:03:13,187 INFO L85 PathProgramCache]: Analyzing trace with hash -581970176, now seen corresponding path program 1 times [2023-08-26 19:03:13,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:03:13,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111925783] [2023-08-26 19:03:13,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:03:13,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:03:13,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:03:13,468 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-26 19:03:13,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:03:13,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111925783] [2023-08-26 19:03:13,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111925783] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:03:13,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132459314] [2023-08-26 19:03:13,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:03:13,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:03:13,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:03:13,469 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:03:13,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-26 19:03:13,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:03:13,571 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 20 conjunts are in the unsatisfiable core [2023-08-26 19:03:13,572 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:03:13,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 19:03:13,650 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 19:03:13,737 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-08-26 19:03:13,737 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 19:03:13,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132459314] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:03:13,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 19:03:13,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 7 [2023-08-26 19:03:13,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916436572] [2023-08-26 19:03:13,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:03:13,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 19:03:13,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:03:13,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 19:03:13,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-08-26 19:03:13,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 607 [2023-08-26 19:03:13,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 132 transitions, 586 flow. Second operand has 5 states, 5 states have (on average 201.0) internal successors, (1005), 5 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:13,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:03:13,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 607 [2023-08-26 19:03:13,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:03:16,303 INFO L124 PetriNetUnfolderBase]: 18760/30811 cut-off events. [2023-08-26 19:03:16,303 INFO L125 PetriNetUnfolderBase]: For 18864/18864 co-relation queries the response was YES. [2023-08-26 19:03:16,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75147 conditions, 30811 events. 18760/30811 cut-off events. For 18864/18864 co-relation queries the response was YES. Maximal size of possible extension queue 1050. Compared 240344 event pairs, 5835 based on Foata normal form. 1807/29071 useless extension candidates. Maximal degree in co-relation 75083. Up to 25404 conditions per place. [2023-08-26 19:03:16,524 INFO L140 encePairwiseOnDemand]: 590/607 looper letters, 227 selfloop transitions, 21 changer transitions 3/263 dead transitions. [2023-08-26 19:03:16,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 263 transitions, 1695 flow [2023-08-26 19:03:16,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 19:03:16,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 19:03:16,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1373 transitions. [2023-08-26 19:03:16,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3769906644700714 [2023-08-26 19:03:16,526 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1373 transitions. [2023-08-26 19:03:16,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1373 transitions. [2023-08-26 19:03:16,526 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:03:16,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1373 transitions. [2023-08-26 19:03:16,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 228.83333333333334) internal successors, (1373), 6 states have internal predecessors, (1373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:16,531 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 607.0) internal successors, (4249), 7 states have internal predecessors, (4249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:16,532 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 607.0) internal successors, (4249), 7 states have internal predecessors, (4249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:16,532 INFO L175 Difference]: Start difference. First operand has 129 places, 132 transitions, 586 flow. Second operand 6 states and 1373 transitions. [2023-08-26 19:03:16,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 263 transitions, 1695 flow [2023-08-26 19:03:16,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 263 transitions, 1695 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 19:03:16,585 INFO L231 Difference]: Finished difference. Result has 133 places, 142 transitions, 754 flow [2023-08-26 19:03:16,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=754, PETRI_PLACES=133, PETRI_TRANSITIONS=142} [2023-08-26 19:03:16,585 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 31 predicate places. [2023-08-26 19:03:16,586 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 142 transitions, 754 flow [2023-08-26 19:03:16,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 201.0) internal successors, (1005), 5 states have internal predecessors, (1005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:16,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:03:16,586 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:03:16,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-26 19:03:16,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-26 19:03:16,791 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr10ASSERT_VIOLATIONASSERT === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-26 19:03:16,791 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:03:16,792 INFO L85 PathProgramCache]: Analyzing trace with hash -469335734, now seen corresponding path program 1 times [2023-08-26 19:03:16,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:03:16,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344847036] [2023-08-26 19:03:16,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:03:16,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:03:16,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:03:16,936 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 19:03:16,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:03:16,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344847036] [2023-08-26 19:03:16,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344847036] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:03:16,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213645716] [2023-08-26 19:03:16,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:03:16,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:03:16,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:03:16,938 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:03:16,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-26 19:03:17,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:03:17,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 19:03:17,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:03:17,063 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-26 19:03:17,117 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-26 19:03:17,117 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 19:03:17,133 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-26 19:03:17,187 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-26 19:03:17,197 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 19:03:17,197 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:03:23,218 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_701 (Array Int Int)) (|t_funThread1of2ForFork0_~p~0#1.offset| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_701) |c_t_funThread1of2ForFork0_~p~0#1.base|) |t_funThread1of2ForFork0_~p~0#1.offset|) 0)) is different from false [2023-08-26 19:03:25,237 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_701 (Array Int Int)) (|t_funThread1of2ForFork0_~p~0#1.offset| Int)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_701) |c_~#a~0.base|) |t_funThread1of2ForFork0_~p~0#1.offset|) 0)) is different from false [2023-08-26 19:03:25,315 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 1 not checked. [2023-08-26 19:03:25,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213645716] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:03:25,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:03:25,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-08-26 19:03:25,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964115185] [2023-08-26 19:03:25,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:03:25,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 19:03:25,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:03:25,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 19:03:25,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=80, Unknown=5, NotChecked=38, Total=156 [2023-08-26 19:03:25,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 607 [2023-08-26 19:03:25,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 142 transitions, 754 flow. Second operand has 13 states, 13 states have (on average 197.3846153846154) internal successors, (2566), 13 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:25,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:03:25,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 607 [2023-08-26 19:03:25,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:03:30,216 INFO L124 PetriNetUnfolderBase]: 18175/29834 cut-off events. [2023-08-26 19:03:30,217 INFO L125 PetriNetUnfolderBase]: For 27498/27512 co-relation queries the response was YES. [2023-08-26 19:03:30,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78233 conditions, 29834 events. 18175/29834 cut-off events. For 27498/27512 co-relation queries the response was YES. Maximal size of possible extension queue 1007. Compared 236955 event pairs, 4706 based on Foata normal form. 302/26867 useless extension candidates. Maximal degree in co-relation 78165. Up to 16843 conditions per place. [2023-08-26 19:03:30,461 INFO L140 encePairwiseOnDemand]: 593/607 looper letters, 232 selfloop transitions, 34 changer transitions 9/287 dead transitions. [2023-08-26 19:03:30,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 287 transitions, 1792 flow [2023-08-26 19:03:30,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 19:03:30,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 19:03:30,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1592 transitions. [2023-08-26 19:03:30,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37467639444575196 [2023-08-26 19:03:30,463 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1592 transitions. [2023-08-26 19:03:30,463 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1592 transitions. [2023-08-26 19:03:30,463 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:03:30,463 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1592 transitions. [2023-08-26 19:03:30,465 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 227.42857142857142) internal successors, (1592), 7 states have internal predecessors, (1592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:30,468 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 607.0) internal successors, (4856), 8 states have internal predecessors, (4856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:30,469 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 607.0) internal successors, (4856), 8 states have internal predecessors, (4856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:30,469 INFO L175 Difference]: Start difference. First operand has 133 places, 142 transitions, 754 flow. Second operand 7 states and 1592 transitions. [2023-08-26 19:03:30,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 287 transitions, 1792 flow [2023-08-26 19:03:30,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 287 transitions, 1791 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:03:30,560 INFO L231 Difference]: Finished difference. Result has 140 places, 146 transitions, 881 flow [2023-08-26 19:03:30,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=753, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=881, PETRI_PLACES=140, PETRI_TRANSITIONS=146} [2023-08-26 19:03:30,561 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 38 predicate places. [2023-08-26 19:03:30,561 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 146 transitions, 881 flow [2023-08-26 19:03:30,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 197.3846153846154) internal successors, (2566), 13 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:30,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:03:30,562 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:03:30,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-26 19:03:30,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-26 19:03:30,769 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t_funErr10ASSERT_VIOLATIONASSERT === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-26 19:03:30,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:03:30,769 INFO L85 PathProgramCache]: Analyzing trace with hash -861211246, now seen corresponding path program 1 times [2023-08-26 19:03:30,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:03:30,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149315452] [2023-08-26 19:03:30,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:03:30,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:03:30,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:03:31,218 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-26 19:03:31,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:03:31,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149315452] [2023-08-26 19:03:31,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149315452] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:03:31,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336598164] [2023-08-26 19:03:31,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:03:31,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:03:31,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:03:31,221 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:03:31,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-26 19:03:31,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:03:31,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-26 19:03:31,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:03:31,367 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-26 19:03:31,428 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-26 19:03:31,428 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 19:03:31,445 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-26 19:03:31,465 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-26 19:03:31,504 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-26 19:03:31,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:03:41,544 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_766 (Array Int Int))) (= ((as const (Array Int Int)) 0) (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_766) |c_~#a~0.base|))) is different from false [2023-08-26 19:03:41,636 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 1 not checked. [2023-08-26 19:03:41,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336598164] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:03:41,636 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:03:41,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-08-26 19:03:41,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522703868] [2023-08-26 19:03:41,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:03:41,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 19:03:41,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:03:41,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 19:03:41,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=93, Unknown=5, NotChecked=20, Total=156 [2023-08-26 19:03:41,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 607 [2023-08-26 19:03:41,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 146 transitions, 881 flow. Second operand has 13 states, 13 states have (on average 178.69230769230768) internal successors, (2323), 13 states have internal predecessors, (2323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:41,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:03:41,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 607 [2023-08-26 19:03:41,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:03:49,184 INFO L124 PetriNetUnfolderBase]: 21699/35251 cut-off events. [2023-08-26 19:03:49,185 INFO L125 PetriNetUnfolderBase]: For 41297/41297 co-relation queries the response was YES. [2023-08-26 19:03:49,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94789 conditions, 35251 events. 21699/35251 cut-off events. For 41297/41297 co-relation queries the response was YES. Maximal size of possible extension queue 1083. Compared 272512 event pairs, 4478 based on Foata normal form. 78/31224 useless extension candidates. Maximal degree in co-relation 94718. Up to 21494 conditions per place. [2023-08-26 19:03:49,440 INFO L140 encePairwiseOnDemand]: 590/607 looper letters, 236 selfloop transitions, 46 changer transitions 17/308 dead transitions. [2023-08-26 19:03:49,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 308 transitions, 2138 flow [2023-08-26 19:03:49,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 19:03:49,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 19:03:49,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1641 transitions. [2023-08-26 19:03:49,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33793245469522243 [2023-08-26 19:03:49,443 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1641 transitions. [2023-08-26 19:03:49,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1641 transitions. [2023-08-26 19:03:49,443 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:03:49,443 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1641 transitions. [2023-08-26 19:03:49,444 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 205.125) internal successors, (1641), 8 states have internal predecessors, (1641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:49,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 607.0) internal successors, (5463), 9 states have internal predecessors, (5463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:49,448 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 607.0) internal successors, (5463), 9 states have internal predecessors, (5463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:49,448 INFO L175 Difference]: Start difference. First operand has 140 places, 146 transitions, 881 flow. Second operand 8 states and 1641 transitions. [2023-08-26 19:03:49,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 308 transitions, 2138 flow [2023-08-26 19:03:49,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 308 transitions, 2076 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-26 19:03:49,535 INFO L231 Difference]: Finished difference. Result has 151 places, 163 transitions, 1175 flow [2023-08-26 19:03:49,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=840, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1175, PETRI_PLACES=151, PETRI_TRANSITIONS=163} [2023-08-26 19:03:49,536 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 49 predicate places. [2023-08-26 19:03:49,536 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 163 transitions, 1175 flow [2023-08-26 19:03:49,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 178.69230769230768) internal successors, (2323), 13 states have internal predecessors, (2323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:49,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:03:49,537 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:03:49,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-26 19:03:49,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-26 19:03:49,738 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-26 19:03:49,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:03:49,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1481352163, now seen corresponding path program 1 times [2023-08-26 19:03:49,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:03:49,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034565563] [2023-08-26 19:03:49,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:03:49,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:03:49,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:03:49,789 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 19:03:49,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:03:49,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034565563] [2023-08-26 19:03:49,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034565563] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:03:49,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899636962] [2023-08-26 19:03:49,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:03:49,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:03:49,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:03:49,791 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:03:49,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-26 19:03:49,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:03:49,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-26 19:03:49,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:03:49,941 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 19:03:49,942 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:03:49,966 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 19:03:49,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899636962] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:03:49,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:03:49,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-08-26 19:03:49,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790698238] [2023-08-26 19:03:49,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:03:49,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-26 19:03:49,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:03:49,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-26 19:03:49,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-08-26 19:03:49,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 607 [2023-08-26 19:03:49,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 163 transitions, 1175 flow. Second operand has 9 states, 9 states have (on average 259.6666666666667) internal successors, (2337), 9 states have internal predecessors, (2337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:49,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:03:49,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 607 [2023-08-26 19:03:49,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:03:50,352 INFO L124 PetriNetUnfolderBase]: 1768/3315 cut-off events. [2023-08-26 19:03:50,352 INFO L125 PetriNetUnfolderBase]: For 5749/5805 co-relation queries the response was YES. [2023-08-26 19:03:50,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10371 conditions, 3315 events. 1768/3315 cut-off events. For 5749/5805 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 21549 event pairs, 104 based on Foata normal form. 376/3532 useless extension candidates. Maximal degree in co-relation 10337. Up to 2126 conditions per place. [2023-08-26 19:03:50,366 INFO L140 encePairwiseOnDemand]: 604/607 looper letters, 99 selfloop transitions, 3 changer transitions 24/134 dead transitions. [2023-08-26 19:03:50,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 134 transitions, 1033 flow [2023-08-26 19:03:50,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 19:03:50,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 19:03:50,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1370 transitions. [2023-08-26 19:03:50,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4514003294892916 [2023-08-26 19:03:50,367 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1370 transitions. [2023-08-26 19:03:50,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1370 transitions. [2023-08-26 19:03:50,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:03:50,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1370 transitions. [2023-08-26 19:03:50,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 274.0) internal successors, (1370), 5 states have internal predecessors, (1370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:50,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 607.0) internal successors, (3642), 6 states have internal predecessors, (3642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:50,371 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 607.0) internal successors, (3642), 6 states have internal predecessors, (3642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:50,371 INFO L175 Difference]: Start difference. First operand has 151 places, 163 transitions, 1175 flow. Second operand 5 states and 1370 transitions. [2023-08-26 19:03:50,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 134 transitions, 1033 flow [2023-08-26 19:03:50,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 134 transitions, 905 flow, removed 46 selfloop flow, removed 13 redundant places. [2023-08-26 19:03:50,384 INFO L231 Difference]: Finished difference. Result has 100 places, 62 transitions, 325 flow [2023-08-26 19:03:50,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=325, PETRI_PLACES=100, PETRI_TRANSITIONS=62} [2023-08-26 19:03:50,384 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -2 predicate places. [2023-08-26 19:03:50,384 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 62 transitions, 325 flow [2023-08-26 19:03:50,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 259.6666666666667) internal successors, (2337), 9 states have internal predecessors, (2337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:50,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:03:50,385 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:03:50,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-26 19:03:50,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:03:50,590 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t_funErr10ASSERT_VIOLATIONASSERT === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-26 19:03:50,590 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:03:50,591 INFO L85 PathProgramCache]: Analyzing trace with hash -564219066, now seen corresponding path program 1 times [2023-08-26 19:03:50,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:03:50,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101438669] [2023-08-26 19:03:50,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:03:50,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:03:50,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:03:50,744 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 19:03:50,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:03:50,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101438669] [2023-08-26 19:03:50,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101438669] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 19:03:50,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 19:03:50,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 19:03:50,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527489705] [2023-08-26 19:03:50,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 19:03:50,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 19:03:50,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:03:50,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 19:03:50,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 19:03:50,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 201 out of 607 [2023-08-26 19:03:50,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 62 transitions, 325 flow. Second operand has 5 states, 5 states have (on average 204.4) internal successors, (1022), 5 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:50,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:03:50,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 201 of 607 [2023-08-26 19:03:50,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:03:51,144 INFO L124 PetriNetUnfolderBase]: 736/1461 cut-off events. [2023-08-26 19:03:51,144 INFO L125 PetriNetUnfolderBase]: For 2711/2711 co-relation queries the response was YES. [2023-08-26 19:03:51,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4615 conditions, 1461 events. 736/1461 cut-off events. For 2711/2711 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8556 event pairs, 201 based on Foata normal form. 192/1501 useless extension candidates. Maximal degree in co-relation 4586. Up to 684 conditions per place. [2023-08-26 19:03:51,151 INFO L140 encePairwiseOnDemand]: 593/607 looper letters, 63 selfloop transitions, 17 changer transitions 5/92 dead transitions. [2023-08-26 19:03:51,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 92 transitions, 641 flow [2023-08-26 19:03:51,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 19:03:51,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 19:03:51,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1071 transitions. [2023-08-26 19:03:51,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3528830313014827 [2023-08-26 19:03:51,153 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1071 transitions. [2023-08-26 19:03:51,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1071 transitions. [2023-08-26 19:03:51,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:03:51,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1071 transitions. [2023-08-26 19:03:51,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 214.2) internal successors, (1071), 5 states have internal predecessors, (1071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:51,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 607.0) internal successors, (3642), 6 states have internal predecessors, (3642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:51,157 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 607.0) internal successors, (3642), 6 states have internal predecessors, (3642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:51,157 INFO L175 Difference]: Start difference. First operand has 100 places, 62 transitions, 325 flow. Second operand 5 states and 1071 transitions. [2023-08-26 19:03:51,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 92 transitions, 641 flow [2023-08-26 19:03:51,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 92 transitions, 602 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-26 19:03:51,162 INFO L231 Difference]: Finished difference. Result has 95 places, 68 transitions, 372 flow [2023-08-26 19:03:51,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=372, PETRI_PLACES=95, PETRI_TRANSITIONS=68} [2023-08-26 19:03:51,162 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -7 predicate places. [2023-08-26 19:03:51,162 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 68 transitions, 372 flow [2023-08-26 19:03:51,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 204.4) internal successors, (1022), 5 states have internal predecessors, (1022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:03:51,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:03:51,163 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:03:51,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-08-26 19:03:51,163 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t_funErr10ASSERT_VIOLATIONASSERT === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-26 19:03:51,163 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:03:51,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1647101910, now seen corresponding path program 1 times [2023-08-26 19:03:51,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:03:51,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410187606] [2023-08-26 19:03:51,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:03:51,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:03:51,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:03:54,304 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 19:03:54,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:03:54,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410187606] [2023-08-26 19:03:54,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410187606] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:03:54,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994091653] [2023-08-26 19:03:54,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:03:54,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:03:54,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:03:54,306 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:03:54,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-26 19:03:54,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:03:54,430 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-26 19:03:54,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:03:54,436 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-26 19:03:54,533 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-26 19:03:54,533 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 19:03:54,566 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-26 19:03:54,589 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-26 19:03:54,625 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-26 19:03:54,695 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-26 19:03:54,695 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2023-08-26 19:03:54,767 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 18 treesize of output 13 [2023-08-26 19:03:54,821 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-26 19:03:54,821 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:03:54,977 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 15 treesize of output 13 [2023-08-26 19:03:54,982 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 12 treesize of output 8 [2023-08-26 19:04:05,053 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_946 (Array Int Int)) (v_ArrVal_949 Int) (|v_t_funThread1of2ForFork0_~p~0#1.offset_86| Int) (|v_t_funThread2of2ForFork0_~p~0#1.offset_92| Int)) (or (= (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_946) |c_~#a~0.base|) |v_t_funThread2of2ForFork0_~p~0#1.offset_92| v_ArrVal_949) |v_t_funThread1of2ForFork0_~p~0#1.offset_86|) 0) (= |v_t_funThread1of2ForFork0_~p~0#1.offset_86| |v_t_funThread2of2ForFork0_~p~0#1.offset_92|))) is different from false [2023-08-26 19:04:05,215 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 1 not checked. [2023-08-26 19:04:05,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994091653] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:04:05,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:04:05,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 6, 6] total 30 [2023-08-26 19:04:05,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560074403] [2023-08-26 19:04:05,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:04:05,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-26 19:04:05,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:04:05,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-26 19:04:05,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=764, Unknown=3, NotChecked=58, Total=992 [2023-08-26 19:04:05,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 607 [2023-08-26 19:04:05,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 68 transitions, 372 flow. Second operand has 32 states, 32 states have (on average 164.96875) internal successors, (5279), 32 states have internal predecessors, (5279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:04:05,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:04:05,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 607 [2023-08-26 19:04:05,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:04:06,485 INFO L124 PetriNetUnfolderBase]: 1008/1996 cut-off events. [2023-08-26 19:04:06,485 INFO L125 PetriNetUnfolderBase]: For 3105/3111 co-relation queries the response was YES. [2023-08-26 19:04:06,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6512 conditions, 1996 events. 1008/1996 cut-off events. For 3105/3111 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 12648 event pairs, 170 based on Foata normal form. 12/1782 useless extension candidates. Maximal degree in co-relation 6484. Up to 784 conditions per place. [2023-08-26 19:04:06,493 INFO L140 encePairwiseOnDemand]: 596/607 looper letters, 77 selfloop transitions, 32 changer transitions 18/133 dead transitions. [2023-08-26 19:04:06,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 133 transitions, 914 flow [2023-08-26 19:04:06,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-26 19:04:06,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-26 19:04:06,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3207 transitions. [2023-08-26 19:04:06,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2780716205670684 [2023-08-26 19:04:06,497 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3207 transitions. [2023-08-26 19:04:06,497 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3207 transitions. [2023-08-26 19:04:06,498 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:04:06,498 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3207 transitions. [2023-08-26 19:04:06,501 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 168.78947368421052) internal successors, (3207), 19 states have internal predecessors, (3207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:04:06,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 607.0) internal successors, (12140), 20 states have internal predecessors, (12140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:04:06,509 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 607.0) internal successors, (12140), 20 states have internal predecessors, (12140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:04:06,510 INFO L175 Difference]: Start difference. First operand has 95 places, 68 transitions, 372 flow. Second operand 19 states and 3207 transitions. [2023-08-26 19:04:06,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 133 transitions, 914 flow [2023-08-26 19:04:06,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 133 transitions, 913 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 19:04:06,520 INFO L231 Difference]: Finished difference. Result has 116 places, 78 transitions, 544 flow [2023-08-26 19:04:06,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=544, PETRI_PLACES=116, PETRI_TRANSITIONS=78} [2023-08-26 19:04:06,524 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 14 predicate places. [2023-08-26 19:04:06,525 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 78 transitions, 544 flow [2023-08-26 19:04:06,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 164.96875) internal successors, (5279), 32 states have internal predecessors, (5279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:04:06,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:04:06,525 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:04:06,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-26 19:04:06,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-26 19:04:06,731 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t_funErr10ASSERT_VIOLATIONASSERT === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-26 19:04:06,731 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:04:06,732 INFO L85 PathProgramCache]: Analyzing trace with hash -711770373, now seen corresponding path program 1 times [2023-08-26 19:04:06,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:04:06,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815993827] [2023-08-26 19:04:06,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:04:06,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:04:06,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:04:07,219 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-26 19:04:07,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:04:07,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815993827] [2023-08-26 19:04:07,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815993827] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:04:07,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124681087] [2023-08-26 19:04:07,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:04:07,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:04:07,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:04:07,221 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:04:07,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-26 19:04:07,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:04:07,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-26 19:04:07,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:04:07,386 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-26 19:04:07,476 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-26 19:04:07,477 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 19:04:07,499 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-26 19:04:07,530 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-26 19:04:07,557 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-26 19:04:07,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 19:04:07,604 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-26 19:04:07,639 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 18 treesize of output 13 [2023-08-26 19:04:07,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 19:04:07,673 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-26 19:04:07,710 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-26 19:04:07,711 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2023-08-26 19:04:07,747 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-26 19:04:07,748 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:04:07,874 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 19:04:07,874 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2023-08-26 19:04:07,882 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 19:04:07,883 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 35 [2023-08-26 19:04:07,887 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 22 treesize of output 18 [2023-08-26 19:04:19,991 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((|v_t_funThread1of2ForFork0_~p~0#1.offset_88| Int) (v_ArrVal_1035 Int) (|v_t_funThread2of2ForFork0_~p~0#1.offset_94| Int) (v_ArrVal_1031 (Array Int Int))) (or (= |v_t_funThread1of2ForFork0_~p~0#1.offset_88| |v_t_funThread2of2ForFork0_~p~0#1.offset_94|) (= (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1031) |c_~#a~0.base|) |v_t_funThread1of2ForFork0_~p~0#1.offset_88| v_ArrVal_1035) |v_t_funThread2of2ForFork0_~p~0#1.offset_94|) 0))) (not (= |c_~#a~0.base| |c_~#__global_lock~0.base|))) is different from false [2023-08-26 19:04:22,164 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 1 not checked. [2023-08-26 19:04:22,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124681087] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:04:22,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:04:22,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 21 [2023-08-26 19:04:22,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076759981] [2023-08-26 19:04:22,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:04:22,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-26 19:04:22,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:04:22,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-26 19:04:22,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=339, Unknown=7, NotChecked=40, Total=506 [2023-08-26 19:04:22,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 607 [2023-08-26 19:04:22,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 78 transitions, 544 flow. Second operand has 23 states, 23 states have (on average 169.2173913043478) internal successors, (3892), 23 states have internal predecessors, (3892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:04:22,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:04:22,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 607 [2023-08-26 19:04:22,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:04:25,296 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:04:27,309 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:04:27,539 INFO L124 PetriNetUnfolderBase]: 1295/2581 cut-off events. [2023-08-26 19:04:27,539 INFO L125 PetriNetUnfolderBase]: For 8061/8073 co-relation queries the response was YES. [2023-08-26 19:04:27,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9414 conditions, 2581 events. 1295/2581 cut-off events. For 8061/8073 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 17286 event pairs, 160 based on Foata normal form. 12/2315 useless extension candidates. Maximal degree in co-relation 9382. Up to 980 conditions per place. [2023-08-26 19:04:27,549 INFO L140 encePairwiseOnDemand]: 593/607 looper letters, 113 selfloop transitions, 41 changer transitions 29/189 dead transitions. [2023-08-26 19:04:27,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 189 transitions, 1506 flow [2023-08-26 19:04:27,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-26 19:04:27,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-26 19:04:27,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 2646 transitions. [2023-08-26 19:04:27,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.29060955518945636 [2023-08-26 19:04:27,552 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 2646 transitions. [2023-08-26 19:04:27,552 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 2646 transitions. [2023-08-26 19:04:27,553 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:04:27,553 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 2646 transitions. [2023-08-26 19:04:27,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 176.4) internal successors, (2646), 15 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:04:27,562 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 607.0) internal successors, (9712), 16 states have internal predecessors, (9712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:04:27,563 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 607.0) internal successors, (9712), 16 states have internal predecessors, (9712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:04:27,563 INFO L175 Difference]: Start difference. First operand has 116 places, 78 transitions, 544 flow. Second operand 15 states and 2646 transitions. [2023-08-26 19:04:27,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 189 transitions, 1506 flow [2023-08-26 19:04:27,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 189 transitions, 1399 flow, removed 19 selfloop flow, removed 22 redundant places. [2023-08-26 19:04:27,574 INFO L231 Difference]: Finished difference. Result has 114 places, 100 transitions, 776 flow [2023-08-26 19:04:27,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=776, PETRI_PLACES=114, PETRI_TRANSITIONS=100} [2023-08-26 19:04:27,575 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 12 predicate places. [2023-08-26 19:04:27,575 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 100 transitions, 776 flow [2023-08-26 19:04:27,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 169.2173913043478) internal successors, (3892), 23 states have internal predecessors, (3892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:04:27,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:04:27,576 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:04:27,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-26 19:04:27,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:04:27,782 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t_funErr10ASSERT_VIOLATIONASSERT === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-26 19:04:27,782 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:04:27,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1736712965, now seen corresponding path program 2 times [2023-08-26 19:04:27,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:04:27,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240924285] [2023-08-26 19:04:27,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:04:27,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:04:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:04:30,805 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 19:04:30,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:04:30,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240924285] [2023-08-26 19:04:30,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240924285] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:04:30,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758452688] [2023-08-26 19:04:30,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 19:04:30,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:04:30,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:04:30,809 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:04:30,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-26 19:04:30,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 19:04:30,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:04:30,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-26 19:04:30,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:04:30,963 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-26 19:04:31,065 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-26 19:04:31,065 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 19:04:31,100 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-26 19:04:31,126 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-26 19:04:31,166 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-26 19:04:31,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 19:04:31,216 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-26 19:04:31,269 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-26 19:04:31,269 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2023-08-26 19:04:31,303 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 18 treesize of output 13 [2023-08-26 19:04:31,342 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-26 19:04:31,342 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:04:31,551 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 19:04:31,552 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2023-08-26 19:04:31,559 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 19:04:31,560 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 35 [2023-08-26 19:04:31,564 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 22 treesize of output 18 [2023-08-26 19:04:49,681 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1118 (Array Int Int)) (v_ArrVal_1122 Int) (|v_t_funThread2of2ForFork0_~p~0#1.offset_96| Int) (|v_t_funThread1of2ForFork0_~p~0#1.offset_90| Int)) (or (= |v_t_funThread1of2ForFork0_~p~0#1.offset_90| |v_t_funThread2of2ForFork0_~p~0#1.offset_96|) (= (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1118) |c_~#a~0.base|) |v_t_funThread1of2ForFork0_~p~0#1.offset_90| v_ArrVal_1122) |v_t_funThread2of2ForFork0_~p~0#1.offset_96|) 0))) (not (= |c_~#a~0.base| |c_~#__global_lock~0.base|))) is different from false [2023-08-26 19:04:51,908 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 1 not checked. [2023-08-26 19:04:51,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758452688] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:04:51,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:04:51,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7, 7] total 31 [2023-08-26 19:04:51,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418241814] [2023-08-26 19:04:51,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:04:51,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-26 19:04:51,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:04:51,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-26 19:04:51,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=829, Unknown=6, NotChecked=60, Total=1056 [2023-08-26 19:04:51,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 607 [2023-08-26 19:04:51,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 100 transitions, 776 flow. Second operand has 33 states, 33 states have (on average 164.9090909090909) internal successors, (5442), 33 states have internal predecessors, (5442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:04:51,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:04:51,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 607 [2023-08-26 19:04:51,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:04:54,646 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:04:54,849 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_t_funThread1of2ForFork0_~p~0#1.base|))) (and (forall ((v_ArrVal_1122 Int) (|v_t_funThread2of2ForFork0_~p~0#1.offset_96| Int) (v_ArrVal_1121 (Array Int Int))) (or (= (select (select (store |c_#memory_int| |c_t_funThread1of2ForFork0_~p~0#1.base| (store .cse0 |c_t_funThread1of2ForFork0_~p~0#1.offset| v_ArrVal_1122)) |c_~#a~0.base|) |v_t_funThread2of2ForFork0_~p~0#1.offset_96|) 0) (not (= 0 (select (select (store |c_#pthreadsMutex| |c_~#__global_lock~0.base| v_ArrVal_1121) |c_~#a~0.base|) (+ 4 |v_t_funThread2of2ForFork0_~p~0#1.offset_96|)))))) (forall ((v_ArrVal_1122 Int)) (= (select (select (store |c_#memory_int| |c_t_funThread1of2ForFork0_~p~0#1.base| (store .cse0 |c_t_funThread1of2ForFork0_~p~0#1.offset| v_ArrVal_1122)) |c_t_funThread2of2ForFork0_~p~0#1.base|) |c_t_funThread2of2ForFork0_~p~0#1.offset|) 0)) (= |c_t_funThread2of2ForFork0_~p~0#1.base| 4) (exists ((v_ArrVal_1122 Int) (|t_funThread1of2ForFork0_~p~0#1.offset| Int)) (and (not (= |c_t_funThread2of2ForFork0_~p~0#1.offset| |t_funThread1of2ForFork0_~p~0#1.offset|)) (= (store ((as const (Array Int Int)) 0) |t_funThread1of2ForFork0_~p~0#1.offset| v_ArrVal_1122) (select |c_#memory_int| 4)))) (or (let ((.cse1 (= |c_t_funThread2of2ForFork0_~p~0#1.offset| |c_t_funThread1of2ForFork0_~p~0#1.offset|))) (and (or (and (= (select .cse0 |c_t_funThread2of2ForFork0_~p~0#1.offset|) 0) (= |c_t_funThread2of2ForFork0_~p~0#1.base| |c_t_funThread1of2ForFork0_~p~0#1.base|)) .cse1) (or (<= (+ |c_t_funThread2of2ForFork0_~p~0#1.offset| 1) 0) (not .cse1)))) (<= (+ |c_t_funThread2of2ForFork0_~p~0#1.offset| 28) 0)))) is different from false [2023-08-26 19:04:57,111 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:04:59,240 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:05:01,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:05:03,331 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:05:05,336 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:05:08,057 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:05:08,416 INFO L124 PetriNetUnfolderBase]: 1492/3012 cut-off events. [2023-08-26 19:05:08,416 INFO L125 PetriNetUnfolderBase]: For 19880/19892 co-relation queries the response was YES. [2023-08-26 19:05:08,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12990 conditions, 3012 events. 1492/3012 cut-off events. For 19880/19892 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 21372 event pairs, 201 based on Foata normal form. 24/2714 useless extension candidates. Maximal degree in co-relation 12961. Up to 1190 conditions per place. [2023-08-26 19:05:08,430 INFO L140 encePairwiseOnDemand]: 592/607 looper letters, 135 selfloop transitions, 61 changer transitions 25/227 dead transitions. [2023-08-26 19:05:08,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 227 transitions, 2126 flow [2023-08-26 19:05:08,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-26 19:05:08,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-26 19:05:08,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 4241 transitions. [2023-08-26 19:05:08,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2794728171334432 [2023-08-26 19:05:08,435 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 4241 transitions. [2023-08-26 19:05:08,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 4241 transitions. [2023-08-26 19:05:08,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:05:08,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 4241 transitions. [2023-08-26 19:05:08,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 169.64) internal successors, (4241), 25 states have internal predecessors, (4241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:05:08,449 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 607.0) internal successors, (15782), 26 states have internal predecessors, (15782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:05:08,450 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 607.0) internal successors, (15782), 26 states have internal predecessors, (15782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:05:08,451 INFO L175 Difference]: Start difference. First operand has 114 places, 100 transitions, 776 flow. Second operand 25 states and 4241 transitions. [2023-08-26 19:05:08,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 227 transitions, 2126 flow [2023-08-26 19:05:08,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 227 transitions, 1799 flow, removed 139 selfloop flow, removed 7 redundant places. [2023-08-26 19:05:08,503 INFO L231 Difference]: Finished difference. Result has 138 places, 126 transitions, 1011 flow [2023-08-26 19:05:08,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=628, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=1011, PETRI_PLACES=138, PETRI_TRANSITIONS=126} [2023-08-26 19:05:08,504 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 36 predicate places. [2023-08-26 19:05:08,504 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 126 transitions, 1011 flow [2023-08-26 19:05:08,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 164.9090909090909) internal successors, (5442), 33 states have internal predecessors, (5442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:05:08,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:05:08,505 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:05:08,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-26 19:05:08,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:05:08,711 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t_funErr10ASSERT_VIOLATIONASSERT === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-26 19:05:08,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:05:08,711 INFO L85 PathProgramCache]: Analyzing trace with hash -229137457, now seen corresponding path program 3 times [2023-08-26 19:05:08,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:05:08,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317084558] [2023-08-26 19:05:08,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:05:08,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:05:08,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:05:11,905 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 19:05:11,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:05:11,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317084558] [2023-08-26 19:05:11,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317084558] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:05:11,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801081750] [2023-08-26 19:05:11,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 19:05:11,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:05:11,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:05:11,907 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:05:11,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-26 19:05:12,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 19:05:12,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:05:12,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-26 19:05:12,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:05:12,084 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-26 19:05:12,161 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-26 19:05:12,161 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 19:05:12,187 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-26 19:05:12,204 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-26 19:05:12,238 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-26 19:05:12,280 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-26 19:05:12,280 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2023-08-26 19:05:12,336 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 18 treesize of output 13 [2023-08-26 19:05:12,378 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-26 19:05:12,378 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:05:12,496 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 15 treesize of output 13 [2023-08-26 19:05:12,500 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 12 treesize of output 8 [2023-08-26 19:05:20,567 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1204 (Array Int Int)) (|v_t_funThread2of2ForFork0_~p~0#1.offset_98| Int) (|v_t_funThread1of2ForFork0_~p~0#1.offset_92| Int) (v_ArrVal_1207 Int)) (or (= (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1204) |c_~#a~0.base|) |v_t_funThread1of2ForFork0_~p~0#1.offset_92| v_ArrVal_1207) |v_t_funThread2of2ForFork0_~p~0#1.offset_98|) 0) (= |v_t_funThread1of2ForFork0_~p~0#1.offset_92| |v_t_funThread2of2ForFork0_~p~0#1.offset_98|))) is different from false [2023-08-26 19:05:20,708 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 1 not checked. [2023-08-26 19:05:20,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801081750] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:05:20,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:05:20,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6, 6] total 29 [2023-08-26 19:05:20,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346210514] [2023-08-26 19:05:20,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:05:20,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-26 19:05:20,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:05:20,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-26 19:05:20,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=715, Unknown=2, NotChecked=56, Total=930 [2023-08-26 19:05:20,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 607 [2023-08-26 19:05:20,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 126 transitions, 1011 flow. Second operand has 31 states, 31 states have (on average 164.03225806451613) internal successors, (5085), 31 states have internal predecessors, (5085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:05:20,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:05:20,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 607 [2023-08-26 19:05:20,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:05:24,041 INFO L124 PetriNetUnfolderBase]: 1506/3072 cut-off events. [2023-08-26 19:05:24,041 INFO L125 PetriNetUnfolderBase]: For 20131/20143 co-relation queries the response was YES. [2023-08-26 19:05:24,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13798 conditions, 3072 events. 1506/3072 cut-off events. For 20131/20143 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 22007 event pairs, 274 based on Foata normal form. 12/2762 useless extension candidates. Maximal degree in co-relation 13764. Up to 1771 conditions per place. [2023-08-26 19:05:24,055 INFO L140 encePairwiseOnDemand]: 594/607 looper letters, 129 selfloop transitions, 38 changer transitions 19/192 dead transitions. [2023-08-26 19:05:24,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 192 transitions, 1833 flow [2023-08-26 19:05:24,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-26 19:05:24,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-26 19:05:24,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3518 transitions. [2023-08-26 19:05:24,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27598650662901075 [2023-08-26 19:05:24,059 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3518 transitions. [2023-08-26 19:05:24,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3518 transitions. [2023-08-26 19:05:24,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:05:24,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3518 transitions. [2023-08-26 19:05:24,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 167.52380952380952) internal successors, (3518), 21 states have internal predecessors, (3518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:05:24,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 607.0) internal successors, (13354), 22 states have internal predecessors, (13354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:05:24,073 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 607.0) internal successors, (13354), 22 states have internal predecessors, (13354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:05:24,073 INFO L175 Difference]: Start difference. First operand has 138 places, 126 transitions, 1011 flow. Second operand 21 states and 3518 transitions. [2023-08-26 19:05:24,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 192 transitions, 1833 flow [2023-08-26 19:05:24,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 192 transitions, 1752 flow, removed 13 selfloop flow, removed 16 redundant places. [2023-08-26 19:05:24,118 INFO L231 Difference]: Finished difference. Result has 146 places, 134 transitions, 1114 flow [2023-08-26 19:05:24,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=930, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1114, PETRI_PLACES=146, PETRI_TRANSITIONS=134} [2023-08-26 19:05:24,119 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 44 predicate places. [2023-08-26 19:05:24,119 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 134 transitions, 1114 flow [2023-08-26 19:05:24,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 164.03225806451613) internal successors, (5085), 31 states have internal predecessors, (5085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:05:24,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:05:24,120 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:05:24,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-26 19:05:24,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:05:24,325 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t_funErr10ASSERT_VIOLATIONASSERT === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-26 19:05:24,326 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:05:24,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1747702122, now seen corresponding path program 2 times [2023-08-26 19:05:24,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:05:24,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125791324] [2023-08-26 19:05:24,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:05:24,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:05:24,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:05:26,969 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 19:05:26,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:05:26,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125791324] [2023-08-26 19:05:26,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125791324] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:05:26,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598720294] [2023-08-26 19:05:26,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 19:05:26,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:05:26,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:05:26,970 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:05:26,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-26 19:05:27,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 19:05:27,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:05:27,112 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 37 conjunts are in the unsatisfiable core [2023-08-26 19:05:27,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:05:27,119 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-26 19:05:27,221 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-26 19:05:27,222 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 19:05:27,260 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-26 19:05:27,289 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-26 19:05:27,332 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-26 19:05:27,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 19:05:27,399 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-26 19:05:27,453 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-26 19:05:27,453 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2023-08-26 19:05:27,499 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 18 treesize of output 13 [2023-08-26 19:05:27,553 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-26 19:05:27,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:05:27,675 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1293 Int) (|v_t_funThread1of2ForFork0_~p~0#1.offset_94| Int) (v_ArrVal_1292 (Array Int Int))) (or (= (select (select (store |c_#memory_int| |c_t_funThread2of2ForFork0_~p~0#1.base| (store (select |c_#memory_int| |c_t_funThread2of2ForFork0_~p~0#1.base|) |c_t_funThread2of2ForFork0_~p~0#1.offset| v_ArrVal_1293)) |c_~#a~0.base|) |v_t_funThread1of2ForFork0_~p~0#1.offset_94|) 0) (not (= (select (select (store |c_#pthreadsMutex| |c_~#__global_lock~0.base| v_ArrVal_1292) |c_~#a~0.base|) (+ |v_t_funThread1of2ForFork0_~p~0#1.offset_94| 4)) 0)))) is different from false [2023-08-26 19:05:27,692 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 19:05:27,692 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2023-08-26 19:05:27,698 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 19:05:27,698 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 35 [2023-08-26 19:05:27,702 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 22 treesize of output 18 [2023-08-26 19:05:39,795 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1293 Int) (|v_t_funThread2of2ForFork0_~p~0#1.offset_100| Int) (v_ArrVal_1289 (Array Int Int)) (|v_t_funThread1of2ForFork0_~p~0#1.offset_94| Int)) (or (= |v_t_funThread1of2ForFork0_~p~0#1.offset_94| |v_t_funThread2of2ForFork0_~p~0#1.offset_100|) (= (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1289) |c_~#a~0.base|) |v_t_funThread2of2ForFork0_~p~0#1.offset_100| v_ArrVal_1293) |v_t_funThread1of2ForFork0_~p~0#1.offset_94|) 0))) (not (= |c_~#a~0.base| |c_~#__global_lock~0.base|))) is different from false [2023-08-26 19:05:42,198 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 1 not checked. [2023-08-26 19:05:42,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598720294] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:05:42,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:05:42,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7, 7] total 31 [2023-08-26 19:05:42,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975655202] [2023-08-26 19:05:42,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:05:42,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-26 19:05:42,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:05:42,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-26 19:05:42,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=796, Unknown=4, NotChecked=118, Total=1056 [2023-08-26 19:05:42,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 607 [2023-08-26 19:05:42,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 134 transitions, 1114 flow. Second operand has 33 states, 33 states have (on average 164.9090909090909) internal successors, (5442), 33 states have internal predecessors, (5442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:05:42,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:05:42,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 607 [2023-08-26 19:05:42,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:05:43,958 INFO L124 PetriNetUnfolderBase]: 1676/3435 cut-off events. [2023-08-26 19:05:43,958 INFO L125 PetriNetUnfolderBase]: For 27583/27601 co-relation queries the response was YES. [2023-08-26 19:05:43,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16006 conditions, 3435 events. 1676/3435 cut-off events. For 27583/27601 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 25473 event pairs, 325 based on Foata normal form. 24/3097 useless extension candidates. Maximal degree in co-relation 15967. Up to 1935 conditions per place. [2023-08-26 19:05:43,977 INFO L140 encePairwiseOnDemand]: 596/607 looper letters, 153 selfloop transitions, 41 changer transitions 22/222 dead transitions. [2023-08-26 19:05:43,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 222 transitions, 2205 flow [2023-08-26 19:05:43,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-26 19:05:43,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-26 19:05:43,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 4053 transitions. [2023-08-26 19:05:43,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2782125205930807 [2023-08-26 19:05:43,981 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 4053 transitions. [2023-08-26 19:05:43,981 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 4053 transitions. [2023-08-26 19:05:43,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:05:43,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 4053 transitions. [2023-08-26 19:05:43,986 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 168.875) internal successors, (4053), 24 states have internal predecessors, (4053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:05:43,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 607.0) internal successors, (15175), 25 states have internal predecessors, (15175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:05:43,997 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 607.0) internal successors, (15175), 25 states have internal predecessors, (15175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:05:43,997 INFO L175 Difference]: Start difference. First operand has 146 places, 134 transitions, 1114 flow. Second operand 24 states and 4053 transitions. [2023-08-26 19:05:43,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 222 transitions, 2205 flow [2023-08-26 19:05:44,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 222 transitions, 2136 flow, removed 11 selfloop flow, removed 15 redundant places. [2023-08-26 19:05:44,048 INFO L231 Difference]: Finished difference. Result has 158 places, 148 transitions, 1483 flow [2023-08-26 19:05:44,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=1045, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1483, PETRI_PLACES=158, PETRI_TRANSITIONS=148} [2023-08-26 19:05:44,049 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 56 predicate places. [2023-08-26 19:05:44,049 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 148 transitions, 1483 flow [2023-08-26 19:05:44,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 164.9090909090909) internal successors, (5442), 33 states have internal predecessors, (5442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:05:44,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:05:44,050 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:05:44,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-26 19:05:44,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:05:44,255 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t_funErr10ASSERT_VIOLATIONASSERT === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-26 19:05:44,256 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:05:44,256 INFO L85 PathProgramCache]: Analyzing trace with hash 203787178, now seen corresponding path program 3 times [2023-08-26 19:05:44,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:05:44,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603339881] [2023-08-26 19:05:44,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:05:44,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:05:44,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:05:44,694 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-26 19:05:44,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:05:44,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603339881] [2023-08-26 19:05:44,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603339881] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:05:44,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766820954] [2023-08-26 19:05:44,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 19:05:44,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:05:44,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:05:44,701 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:05:44,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-26 19:05:44,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 19:05:44,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:05:44,869 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-26 19:05:44,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:05:44,877 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-26 19:05:44,970 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-26 19:05:44,970 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 19:05:44,998 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-26 19:05:45,032 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-26 19:05:45,066 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-26 19:05:45,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 19:05:45,123 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-26 19:05:45,144 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 18 treesize of output 13 [2023-08-26 19:05:45,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 19:05:45,178 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-26 19:05:45,214 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-26 19:05:45,214 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2023-08-26 19:05:45,249 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-08-26 19:05:45,249 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:05:45,310 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_t_funThread1of2ForFork0_~p~0#1.offset_96| Int) (v_ArrVal_1379 Int) (v_ArrVal_1381 (Array Int Int))) (or (= (select (select (store |c_#memory_int| |c_t_funThread2of2ForFork0_~p~0#1.base| (store (select |c_#memory_int| |c_t_funThread2of2ForFork0_~p~0#1.base|) |c_t_funThread2of2ForFork0_~p~0#1.offset| v_ArrVal_1379)) |c_~#a~0.base|) |v_t_funThread1of2ForFork0_~p~0#1.offset_96|) 0) (not (= (select (select (store |c_#pthreadsMutex| |c_~#__global_lock~0.base| v_ArrVal_1381) |c_~#a~0.base|) (+ |v_t_funThread1of2ForFork0_~p~0#1.offset_96| 4)) 0)))) is different from false [2023-08-26 19:05:45,339 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 19:05:45,340 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2023-08-26 19:05:45,346 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 19:05:45,346 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 35 [2023-08-26 19:05:45,350 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 22 treesize of output 18 [2023-08-26 19:05:51,447 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((|v_t_funThread2of2ForFork0_~p~0#1.offset_102| Int) (|v_t_funThread1of2ForFork0_~p~0#1.offset_96| Int) (v_ArrVal_1375 (Array Int Int)) (v_ArrVal_1379 Int)) (or (= (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1375) |c_~#a~0.base|) |v_t_funThread2of2ForFork0_~p~0#1.offset_102| v_ArrVal_1379) |v_t_funThread1of2ForFork0_~p~0#1.offset_96|) 0) (= |v_t_funThread1of2ForFork0_~p~0#1.offset_96| |v_t_funThread2of2ForFork0_~p~0#1.offset_102|))) (not (= |c_~#a~0.base| |c_~#__global_lock~0.base|))) is different from false [2023-08-26 19:05:53,774 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 1 not checked. [2023-08-26 19:05:53,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766820954] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:05:53,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:05:53,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 21 [2023-08-26 19:05:53,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126977150] [2023-08-26 19:05:53,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:05:53,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-26 19:05:53,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:05:53,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-26 19:05:53,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=313, Unknown=2, NotChecked=78, Total=506 [2023-08-26 19:05:53,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 167 out of 607 [2023-08-26 19:05:53,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 148 transitions, 1483 flow. Second operand has 23 states, 23 states have (on average 169.2173913043478) internal successors, (3892), 23 states have internal predecessors, (3892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:05:53,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:05:53,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 167 of 607 [2023-08-26 19:05:53,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:06:09,873 WARN L234 SmtUtils]: Spent 16.06s on a formula simplification. DAG size of input: 40 DAG size of output: 26 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 19:06:11,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:06:14,317 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:06:30,711 WARN L234 SmtUtils]: Spent 16.29s on a formula simplification. DAG size of input: 36 DAG size of output: 22 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 19:06:32,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:06:35,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-26 19:06:38,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:06:40,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-26 19:06:42,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:06:44,835 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:06:47,390 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:06:49,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-26 19:06:51,399 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:06:53,856 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:06:55,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:06:57,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:06:59,256 INFO L124 PetriNetUnfolderBase]: 1854/3788 cut-off events. [2023-08-26 19:06:59,256 INFO L125 PetriNetUnfolderBase]: For 30747/30747 co-relation queries the response was YES. [2023-08-26 19:06:59,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17721 conditions, 3788 events. 1854/3788 cut-off events. For 30747/30747 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 28395 event pairs, 282 based on Foata normal form. 3/3378 useless extension candidates. Maximal degree in co-relation 17677. Up to 1995 conditions per place. [2023-08-26 19:06:59,277 INFO L140 encePairwiseOnDemand]: 595/607 looper letters, 172 selfloop transitions, 54 changer transitions 26/258 dead transitions. [2023-08-26 19:06:59,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 258 transitions, 2801 flow [2023-08-26 19:06:59,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-26 19:06:59,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-26 19:06:59,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 3158 transitions. [2023-08-26 19:06:59,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28903532857404357 [2023-08-26 19:06:59,282 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 3158 transitions. [2023-08-26 19:06:59,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 3158 transitions. [2023-08-26 19:06:59,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:06:59,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 3158 transitions. [2023-08-26 19:06:59,286 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 175.44444444444446) internal successors, (3158), 18 states have internal predecessors, (3158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:06:59,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 607.0) internal successors, (11533), 19 states have internal predecessors, (11533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:06:59,293 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 607.0) internal successors, (11533), 19 states have internal predecessors, (11533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:06:59,293 INFO L175 Difference]: Start difference. First operand has 158 places, 148 transitions, 1483 flow. Second operand 18 states and 3158 transitions. [2023-08-26 19:06:59,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 258 transitions, 2801 flow [2023-08-26 19:06:59,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 258 transitions, 2342 flow, removed 204 selfloop flow, removed 15 redundant places. [2023-08-26 19:06:59,402 INFO L231 Difference]: Finished difference. Result has 168 places, 173 transitions, 1605 flow [2023-08-26 19:06:59,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=1168, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1605, PETRI_PLACES=168, PETRI_TRANSITIONS=173} [2023-08-26 19:06:59,402 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 66 predicate places. [2023-08-26 19:06:59,402 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 173 transitions, 1605 flow [2023-08-26 19:06:59,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 169.2173913043478) internal successors, (3892), 23 states have internal predecessors, (3892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:06:59,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:06:59,403 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:06:59,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-26 19:06:59,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-08-26 19:06:59,609 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t_funErr10ASSERT_VIOLATIONASSERT === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-26 19:06:59,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:06:59,609 INFO L85 PathProgramCache]: Analyzing trace with hash -600907827, now seen corresponding path program 4 times [2023-08-26 19:06:59,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:06:59,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946692252] [2023-08-26 19:06:59,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:06:59,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:06:59,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:07:02,347 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 19:07:02,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:07:02,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946692252] [2023-08-26 19:07:02,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946692252] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:07:02,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174284056] [2023-08-26 19:07:02,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 19:07:02,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:07:02,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:07:02,349 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:07:02,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-26 19:07:02,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 19:07:02,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:07:02,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 38 conjunts are in the unsatisfiable core [2023-08-26 19:07:02,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:07:02,494 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-26 19:07:02,611 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-26 19:07:02,611 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 19:07:02,646 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-26 19:07:02,679 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-26 19:07:02,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 19:07:02,753 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-26 19:07:02,782 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 18 treesize of output 13 [2023-08-26 19:07:02,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 19:07:02,832 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-26 19:07:02,879 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-26 19:07:02,936 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-26 19:07:02,937 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2023-08-26 19:07:02,988 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 19:07:02,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:07:03,198 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1468 (Array Int Int)) (v_ArrVal_1467 (Array Int Int)) (v_ArrVal_1465 Int) (|v_t_funThread2of2ForFork0_~p~0#1.offset_104| Int)) (or (not (= (select (select (store |c_#pthreadsMutex| |c_~#__global_lock~0.base| v_ArrVal_1467) |c_~#a~0.base|) (+ 4 |v_t_funThread2of2ForFork0_~p~0#1.offset_104|)) 0)) (= (select (select (store (store |c_#memory_int| |c_t_funThread1of2ForFork0_~p~0#1.base| (store (select |c_#memory_int| |c_t_funThread1of2ForFork0_~p~0#1.base|) |c_t_funThread1of2ForFork0_~p~0#1.offset| v_ArrVal_1465)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1468) |c_~#a~0.base|) |v_t_funThread2of2ForFork0_~p~0#1.offset_104|) 0))) is different from false [2023-08-26 19:07:03,240 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 19:07:03,240 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2023-08-26 19:07:03,247 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 19:07:03,248 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 35 [2023-08-26 19:07:03,252 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 22 treesize of output 18 [2023-08-26 19:07:03,475 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_~#a~0.base|))) (and (forall ((|v_t_funThread1of2ForFork0_~p~0#1.offset_98| Int) (v_ArrVal_1468 (Array Int Int)) (v_ArrVal_1465 Int) (|v_t_funThread2of2ForFork0_~p~0#1.offset_104| Int)) (or (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (store .cse0 |v_t_funThread1of2ForFork0_~p~0#1.offset_98| v_ArrVal_1465)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1468) |c_~#a~0.base|) |v_t_funThread2of2ForFork0_~p~0#1.offset_104|) 0) (= |v_t_funThread1of2ForFork0_~p~0#1.offset_98| |v_t_funThread2of2ForFork0_~p~0#1.offset_104|))) (or (forall ((|v_t_funThread1of2ForFork0_~p~0#1.offset_98| Int) (v_ArrVal_1468 (Array Int Int)) (v_ArrVal_1465 Int) (|v_t_funThread2of2ForFork0_~p~0#1.offset_104| Int)) (= (select (select (store (store |c_#memory_int| |c_~#a~0.base| (store .cse0 |v_t_funThread1of2ForFork0_~p~0#1.offset_98| v_ArrVal_1465)) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1468) |c_~#a~0.base|) |v_t_funThread2of2ForFork0_~p~0#1.offset_104|) 0)) (not (= |c_~#a~0.base| |c_~#__global_lock~0.base|))))) is different from false [2023-08-26 19:07:03,513 WARN L839 $PredicateComparison]: unable to prove that (and (or (not (= |c_~#a~0.base| |c_~#__global_lock~0.base|)) (forall ((|v_t_funThread1of2ForFork0_~p~0#1.offset_98| Int) (v_ArrVal_1468 (Array Int Int)) (v_ArrVal_1465 Int) (v_ArrVal_1461 (Array Int Int)) (|v_t_funThread2of2ForFork0_~p~0#1.offset_104| Int)) (= (select (select (store (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1461))) (store .cse0 |c_~#a~0.base| (store (select .cse0 |c_~#a~0.base|) |v_t_funThread1of2ForFork0_~p~0#1.offset_98| v_ArrVal_1465))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1468) |c_~#a~0.base|) |v_t_funThread2of2ForFork0_~p~0#1.offset_104|) 0))) (forall ((|v_t_funThread1of2ForFork0_~p~0#1.offset_98| Int) (v_ArrVal_1468 (Array Int Int)) (v_ArrVal_1465 Int) (v_ArrVal_1461 (Array Int Int)) (|v_t_funThread2of2ForFork0_~p~0#1.offset_104| Int)) (or (= |v_t_funThread1of2ForFork0_~p~0#1.offset_98| |v_t_funThread2of2ForFork0_~p~0#1.offset_104|) (= (select (select (store (let ((.cse1 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1461))) (store .cse1 |c_~#a~0.base| (store (select .cse1 |c_~#a~0.base|) |v_t_funThread1of2ForFork0_~p~0#1.offset_98| v_ArrVal_1465))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1468) |c_~#a~0.base|) |v_t_funThread2of2ForFork0_~p~0#1.offset_104|) 0)))) is different from false [2023-08-26 19:07:11,635 WARN L234 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 33 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 19:07:11,826 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 2 not checked. [2023-08-26 19:07:11,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174284056] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:07:11,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:07:11,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 7, 8] total 33 [2023-08-26 19:07:11,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475299511] [2023-08-26 19:07:11,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:07:11,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-08-26 19:07:11,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:07:11,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-08-26 19:07:11,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=835, Unknown=5, NotChecked=186, Total=1190 [2023-08-26 19:07:11,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 607 [2023-08-26 19:07:11,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 173 transitions, 1605 flow. Second operand has 35 states, 35 states have (on average 162.8) internal successors, (5698), 35 states have internal predecessors, (5698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:07:11,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:07:11,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 607 [2023-08-26 19:07:11,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:07:14,190 INFO L124 PetriNetUnfolderBase]: 1813/3695 cut-off events. [2023-08-26 19:07:14,190 INFO L125 PetriNetUnfolderBase]: For 19625/19649 co-relation queries the response was YES. [2023-08-26 19:07:14,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16820 conditions, 3695 events. 1813/3695 cut-off events. For 19625/19649 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 27711 event pairs, 253 based on Foata normal form. 3/3281 useless extension candidates. Maximal degree in co-relation 16767. Up to 1505 conditions per place. [2023-08-26 19:07:14,213 INFO L140 encePairwiseOnDemand]: 597/607 looper letters, 156 selfloop transitions, 55 changer transitions 14/231 dead transitions. [2023-08-26 19:07:14,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 231 transitions, 2482 flow [2023-08-26 19:07:14,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-08-26 19:07:14,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-08-26 19:07:14,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3488 transitions. [2023-08-26 19:07:14,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2736330116890249 [2023-08-26 19:07:14,217 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3488 transitions. [2023-08-26 19:07:14,217 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3488 transitions. [2023-08-26 19:07:14,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:07:14,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3488 transitions. [2023-08-26 19:07:14,221 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 166.0952380952381) internal successors, (3488), 21 states have internal predecessors, (3488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:07:14,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 607.0) internal successors, (13354), 22 states have internal predecessors, (13354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:07:14,230 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 607.0) internal successors, (13354), 22 states have internal predecessors, (13354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:07:14,230 INFO L175 Difference]: Start difference. First operand has 168 places, 173 transitions, 1605 flow. Second operand 21 states and 3488 transitions. [2023-08-26 19:07:14,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 231 transitions, 2482 flow [2023-08-26 19:07:14,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 231 transitions, 2390 flow, removed 31 selfloop flow, removed 4 redundant places. [2023-08-26 19:07:14,301 INFO L231 Difference]: Finished difference. Result has 186 places, 176 transitions, 1676 flow [2023-08-26 19:07:14,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=1514, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1676, PETRI_PLACES=186, PETRI_TRANSITIONS=176} [2023-08-26 19:07:14,302 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 84 predicate places. [2023-08-26 19:07:14,302 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 176 transitions, 1676 flow [2023-08-26 19:07:14,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 162.8) internal successors, (5698), 35 states have internal predecessors, (5698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:07:14,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:07:14,303 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:07:14,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-26 19:07:14,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-08-26 19:07:14,505 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t_funErr10ASSERT_VIOLATIONASSERT === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-26 19:07:14,505 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:07:14,505 INFO L85 PathProgramCache]: Analyzing trace with hash 908535376, now seen corresponding path program 5 times [2023-08-26 19:07:14,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:07:14,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945019535] [2023-08-26 19:07:14,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:07:14,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:07:14,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:07:15,016 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 19:07:15,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:07:15,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945019535] [2023-08-26 19:07:15,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945019535] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:07:15,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932366356] [2023-08-26 19:07:15,017 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-26 19:07:15,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:07:15,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:07:15,018 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:07:15,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-26 19:07:15,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-08-26 19:07:15,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:07:15,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 32 conjunts are in the unsatisfiable core [2023-08-26 19:07:15,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:07:15,212 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-26 19:07:15,330 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-26 19:07:15,331 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 19:07:15,365 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-26 19:07:15,392 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-26 19:07:15,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 19:07:15,454 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-26 19:07:15,512 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-26 19:07:15,561 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-26 19:07:15,562 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2023-08-26 19:07:15,594 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 18 treesize of output 13 [2023-08-26 19:07:15,638 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 19:07:15,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:07:15,774 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1552 (Array Int Int)) (v_ArrVal_1553 Int) (v_ArrVal_1551 (Array Int Int)) (|v_t_funThread2of2ForFork0_~p~0#1.offset_106| Int)) (or (not (= (select (select (store |c_#pthreadsMutex| |c_~#__global_lock~0.base| v_ArrVal_1551) |c_~#a~0.base|) (+ 4 |v_t_funThread2of2ForFork0_~p~0#1.offset_106|)) 0)) (= (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1552))) (store .cse0 |c_t_funThread1of2ForFork0_~p~0#1.base| (store (select .cse0 |c_t_funThread1of2ForFork0_~p~0#1.base|) |c_t_funThread1of2ForFork0_~p~0#1.offset| v_ArrVal_1553))) |c_~#a~0.base|) |v_t_funThread2of2ForFork0_~p~0#1.offset_106|) 0))) is different from false [2023-08-26 19:07:15,810 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 19:07:15,810 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 24 [2023-08-26 19:07:15,821 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 19:07:15,822 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 35 [2023-08-26 19:07:15,828 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2023-08-26 19:07:17,866 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((|v_t_funThread1of2ForFork0_~p~0#1.offset_100| Int) (v_ArrVal_1552 (Array Int Int)) (v_ArrVal_1553 Int) (|v_t_funThread2of2ForFork0_~p~0#1.offset_106| Int)) (or (= |v_t_funThread1of2ForFork0_~p~0#1.offset_100| |v_t_funThread2of2ForFork0_~p~0#1.offset_106|) (= (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1552) |c_~#a~0.base|) |v_t_funThread1of2ForFork0_~p~0#1.offset_100| v_ArrVal_1553) |v_t_funThread2of2ForFork0_~p~0#1.offset_106|) 0))) (or (forall ((|v_t_funThread1of2ForFork0_~p~0#1.offset_100| Int) (v_ArrVal_1552 (Array Int Int)) (v_ArrVal_1553 Int) (|v_t_funThread2of2ForFork0_~p~0#1.offset_106| Int)) (= (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1552) |c_~#a~0.base|) |v_t_funThread1of2ForFork0_~p~0#1.offset_100| v_ArrVal_1553) |v_t_funThread2of2ForFork0_~p~0#1.offset_106|) 0)) (not (= |c_~#a~0.base| |c_~#__global_lock~0.base|)))) is different from false [2023-08-26 19:07:22,115 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 2 not checked. [2023-08-26 19:07:22,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932366356] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:07:22,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:07:22,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 19 [2023-08-26 19:07:22,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121228400] [2023-08-26 19:07:22,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:07:22,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-26 19:07:22,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:07:22,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-26 19:07:22,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=283, Unknown=3, NotChecked=70, Total=420 [2023-08-26 19:07:22,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 607 [2023-08-26 19:07:22,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 176 transitions, 1676 flow. Second operand has 21 states, 21 states have (on average 171.52380952380952) internal successors, (3602), 21 states have internal predecessors, (3602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:07:22,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:07:22,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 607 [2023-08-26 19:07:22,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:07:44,316 WARN L234 SmtUtils]: Spent 22.16s on a formula simplification. DAG size of input: 49 DAG size of output: 28 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 19:07:46,321 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:07:48,328 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:07:50,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:07:52,335 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:07:54,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-26 19:07:56,344 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:07:58,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:08:10,560 WARN L234 SmtUtils]: Spent 12.08s on a formula simplification. DAG size of input: 42 DAG size of output: 26 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 19:08:12,564 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:08:14,578 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:08:16,580 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:08:18,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:08:20,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:08:22,641 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-26 19:08:24,647 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:08:26,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:08:29,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:08:31,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:08:33,103 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:08:37,104 INFO L124 PetriNetUnfolderBase]: 1929/3974 cut-off events. [2023-08-26 19:08:37,105 INFO L125 PetriNetUnfolderBase]: For 24156/24180 co-relation queries the response was YES. [2023-08-26 19:08:37,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18613 conditions, 3974 events. 1929/3974 cut-off events. For 24156/24180 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 30230 event pairs, 315 based on Foata normal form. 19/3547 useless extension candidates. Maximal degree in co-relation 18557. Up to 1854 conditions per place. [2023-08-26 19:08:37,133 INFO L140 encePairwiseOnDemand]: 594/607 looper letters, 186 selfloop transitions, 75 changer transitions 34/301 dead transitions. [2023-08-26 19:08:37,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 301 transitions, 3179 flow [2023-08-26 19:08:37,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-08-26 19:08:37,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-08-26 19:08:37,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3883 transitions. [2023-08-26 19:08:37,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2907742998352554 [2023-08-26 19:08:37,136 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3883 transitions. [2023-08-26 19:08:37,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3883 transitions. [2023-08-26 19:08:37,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:08:37,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3883 transitions. [2023-08-26 19:08:37,140 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 176.5) internal successors, (3883), 22 states have internal predecessors, (3883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:08:37,148 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 607.0) internal successors, (13961), 23 states have internal predecessors, (13961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:08:37,149 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 607.0) internal successors, (13961), 23 states have internal predecessors, (13961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:08:37,149 INFO L175 Difference]: Start difference. First operand has 186 places, 176 transitions, 1676 flow. Second operand 22 states and 3883 transitions. [2023-08-26 19:08:37,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 301 transitions, 3179 flow [2023-08-26 19:08:37,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 301 transitions, 3085 flow, removed 1 selfloop flow, removed 18 redundant places. [2023-08-26 19:08:37,215 INFO L231 Difference]: Finished difference. Result has 195 places, 195 transitions, 2047 flow [2023-08-26 19:08:37,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=1589, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2047, PETRI_PLACES=195, PETRI_TRANSITIONS=195} [2023-08-26 19:08:37,216 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 93 predicate places. [2023-08-26 19:08:37,216 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 195 transitions, 2047 flow [2023-08-26 19:08:37,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 171.52380952380952) internal successors, (3602), 21 states have internal predecessors, (3602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:08:37,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:08:37,216 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:08:37,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-26 19:08:37,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:08:37,425 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t_funErr10ASSERT_VIOLATIONASSERT === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-26 19:08:37,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:08:37,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1921960, now seen corresponding path program 4 times [2023-08-26 19:08:37,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:08:37,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764520397] [2023-08-26 19:08:37,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:08:37,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:08:37,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 19:08:39,643 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 19:08:39,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 19:08:39,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764520397] [2023-08-26 19:08:39,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764520397] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 19:08:39,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050959993] [2023-08-26 19:08:39,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 19:08:39,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:08:39,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 19:08:39,644 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 19:08:39,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-26 19:08:39,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 19:08:39,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 19:08:39,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 36 conjunts are in the unsatisfiable core [2023-08-26 19:08:39,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 19:08:39,800 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2023-08-26 19:08:39,916 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-26 19:08:39,916 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 19:08:39,957 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-26 19:08:39,976 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-08-26 19:08:40,059 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 15 [2023-08-26 19:08:40,123 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-26 19:08:40,124 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2023-08-26 19:08:40,210 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 18 treesize of output 13 [2023-08-26 19:08:40,267 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2023-08-26 19:08:40,304 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-08-26 19:08:40,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 19:08:40,601 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 15 treesize of output 13 [2023-08-26 19:08:40,607 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 12 treesize of output 8 [2023-08-26 19:08:40,613 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1644 (Array Int Int)) (v_ArrVal_1641 (Array Int Int)) (v_ArrVal_1642 Int) (|v_t_funThread2of2ForFork0_~p~0#1.offset_108| Int) (|v_t_funThread1of2ForFork0_~p~0#1.offset_102| Int)) (or (= (select (select (store (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1641))) (store .cse0 |c_~#a~0.base| (store (select .cse0 |c_~#a~0.base|) |v_t_funThread2of2ForFork0_~p~0#1.offset_108| v_ArrVal_1642))) |c_ULTIMATE.start_main_~#t_ids~0#1.base| v_ArrVal_1644) |c_~#a~0.base|) |v_t_funThread1of2ForFork0_~p~0#1.offset_102|) 0) (= |v_t_funThread1of2ForFork0_~p~0#1.offset_102| |v_t_funThread2of2ForFork0_~p~0#1.offset_108|))) is different from false [2023-08-26 19:08:40,795 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 3 not checked. [2023-08-26 19:08:40,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050959993] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 19:08:40,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 19:08:40,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6, 7] total 30 [2023-08-26 19:08:40,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599709959] [2023-08-26 19:08:40,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 19:08:40,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-26 19:08:40,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 19:08:40,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-26 19:08:40,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=788, Unknown=16, NotChecked=58, Total=992 [2023-08-26 19:08:40,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 607 [2023-08-26 19:08:40,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 195 transitions, 2047 flow. Second operand has 32 states, 32 states have (on average 166.09375) internal successors, (5315), 32 states have internal predecessors, (5315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:08:40,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 19:08:40,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 607 [2023-08-26 19:08:40,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 19:08:49,077 WARN L234 SmtUtils]: Spent 8.11s on a formula simplification. DAG size of input: 39 DAG size of output: 34 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 19:08:51,079 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:08:53,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:08:55,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:08:57,423 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:09:00,097 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:09:02,108 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:09:04,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-26 19:09:06,130 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:09:08,145 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:09:10,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:09:12,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:09:14,167 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:09:16,184 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-26 19:09:19,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:09:21,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:09:23,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:09:25,047 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:09:27,052 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:09:29,068 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:09:31,071 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:09:33,082 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:09:35,085 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-26 19:09:37,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:09:39,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:09:41,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:09:43,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-26 19:09:45,194 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:09:46,786 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:09:49,451 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:09:51,454 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:09:53,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:09:56,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:09:58,039 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:10:00,584 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:10:03,153 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:10:05,155 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 19:10:07,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1] [2023-08-26 19:10:09,651 INFO L124 PetriNetUnfolderBase]: 1865/3986 cut-off events. [2023-08-26 19:10:09,651 INFO L125 PetriNetUnfolderBase]: For 25420/25440 co-relation queries the response was YES. [2023-08-26 19:10:09,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18860 conditions, 3986 events. 1865/3986 cut-off events. For 25420/25440 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 31777 event pairs, 469 based on Foata normal form. 6/3539 useless extension candidates. Maximal degree in co-relation 18798. Up to 2296 conditions per place. [2023-08-26 19:10:09,679 INFO L140 encePairwiseOnDemand]: 595/607 looper letters, 170 selfloop transitions, 45 changer transitions 35/256 dead transitions. [2023-08-26 19:10:09,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 256 transitions, 2837 flow [2023-08-26 19:10:09,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-08-26 19:10:09,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-08-26 19:10:09,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 3897 transitions. [2023-08-26 19:10:09,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2791347324690208 [2023-08-26 19:10:09,685 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 3897 transitions. [2023-08-26 19:10:09,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 3897 transitions. [2023-08-26 19:10:09,686 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 19:10:09,686 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 3897 transitions. [2023-08-26 19:10:09,690 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 169.43478260869566) internal successors, (3897), 23 states have internal predecessors, (3897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:10:09,699 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 607.0) internal successors, (14568), 24 states have internal predecessors, (14568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:10:09,700 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 607.0) internal successors, (14568), 24 states have internal predecessors, (14568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:10:09,700 INFO L175 Difference]: Start difference. First operand has 195 places, 195 transitions, 2047 flow. Second operand 23 states and 3897 transitions. [2023-08-26 19:10:09,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 256 transitions, 2837 flow [2023-08-26 19:10:09,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 256 transitions, 2648 flow, removed 63 selfloop flow, removed 8 redundant places. [2023-08-26 19:10:09,800 INFO L231 Difference]: Finished difference. Result has 212 places, 195 transitions, 1963 flow [2023-08-26 19:10:09,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=607, PETRI_DIFFERENCE_MINUEND_FLOW=1858, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=1963, PETRI_PLACES=212, PETRI_TRANSITIONS=195} [2023-08-26 19:10:09,800 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 110 predicate places. [2023-08-26 19:10:09,800 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 195 transitions, 1963 flow [2023-08-26 19:10:09,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 166.09375) internal successors, (5315), 32 states have internal predecessors, (5315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 19:10:09,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 19:10:09,801 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 19:10:09,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-26 19:10:10,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 19:10:10,002 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t_funErr10ASSERT_VIOLATIONASSERT === [t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 45 more)] === [2023-08-26 19:10:10,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 19:10:10,002 INFO L85 PathProgramCache]: Analyzing trace with hash 375261741, now seen corresponding path program 6 times [2023-08-26 19:10:10,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 19:10:10,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255516754] [2023-08-26 19:10:10,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 19:10:10,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 19:10:10,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat