/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 INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/pthread/stack_longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 14:21:47,033 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 14:21:47,118 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 14:21:47,125 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 14:21:47,126 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 14:21:47,158 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 14:21:47,159 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 14:21:47,159 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 14:21:47,160 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 14:21:47,163 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 14:21:47,163 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 14:21:47,164 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 14:21:47,164 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 14:21:47,165 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 14:21:47,165 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 14:21:47,166 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 14:21:47,166 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 14:21:47,166 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 14:21:47,166 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 14:21:47,166 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 14:21:47,167 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 14:21:47,168 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 14:21:47,168 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 14:21:47,168 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 14:21:47,168 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 14:21:47,169 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 14:21:47,169 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 14:21:47,169 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 14:21:47,169 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 14:21:47,170 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 14:21:47,170 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 14:21:47,171 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 14:21:47,171 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 14:21:47,171 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 14:21:47,171 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 14:21:47,171 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 14:21:47,444 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 14:21:47,470 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 14:21:47,472 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 14:21:47,473 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 14:21:47,475 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 14:21:47,477 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/stack_longest-2.i [2023-08-26 14:21:48,633 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 14:21:48,956 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 14:21:48,957 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/stack_longest-2.i [2023-08-26 14:21:48,977 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abe5cc4ed/ec5f47a7a34e4547af5bcf0e2a52858d/FLAG4affdda88 [2023-08-26 14:21:48,998 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abe5cc4ed/ec5f47a7a34e4547af5bcf0e2a52858d [2023-08-26 14:21:49,003 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 14:21:49,004 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 14:21:49,006 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 14:21:49,006 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 14:21:49,009 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 14:21:49,009 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:21:48" (1/1) ... [2023-08-26 14:21:49,010 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@198d5bef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:21:49, skipping insertion in model container [2023-08-26 14:21:49,010 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:21:48" (1/1) ... [2023-08-26 14:21:49,064 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 14:21:49,419 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 14:21:49,432 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 14:21:49,464 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-26 14:21:49,466 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [261] [2023-08-26 14:21:49,474 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [753] [2023-08-26 14:21:49,498 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 14:21:49,575 INFO L206 MainTranslator]: Completed translation [2023-08-26 14:21:49,575 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:21:49 WrapperNode [2023-08-26 14:21:49,576 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 14:21:49,577 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 14:21:49,577 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 14:21:49,577 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 14:21:49,583 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:21:49" (1/1) ... [2023-08-26 14:21:49,611 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:21:49" (1/1) ... [2023-08-26 14:21:49,634 INFO L138 Inliner]: procedures = 277, calls = 39, calls flagged for inlining = 12, calls inlined = 13, statements flattened = 155 [2023-08-26 14:21:49,634 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 14:21:49,635 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 14:21:49,635 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 14:21:49,635 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 14:21:49,644 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:21:49" (1/1) ... [2023-08-26 14:21:49,645 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:21:49" (1/1) ... [2023-08-26 14:21:49,662 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:21:49" (1/1) ... [2023-08-26 14:21:49,662 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:21:49" (1/1) ... [2023-08-26 14:21:49,669 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:21:49" (1/1) ... [2023-08-26 14:21:49,672 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:21:49" (1/1) ... [2023-08-26 14:21:49,674 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:21:49" (1/1) ... [2023-08-26 14:21:49,675 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:21:49" (1/1) ... [2023-08-26 14:21:49,690 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 14:21:49,691 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 14:21:49,691 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 14:21:49,692 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 14:21:49,692 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:21:49" (1/1) ... [2023-08-26 14:21:49,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 14:21:49,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 14:21:49,722 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 14:21:49,736 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 14:21:49,755 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-08-26 14:21:49,756 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-08-26 14:21:49,756 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-08-26 14:21:49,756 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-08-26 14:21:49,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 14:21:49,756 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 14:21:49,756 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 14:21:49,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 14:21:49,757 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 14:21:49,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 14:21:49,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 14:21:49,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 14:21:49,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 14:21:49,758 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 14:21:49,887 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 14:21:49,889 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 14:21:50,104 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 14:21:50,112 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 14:21:50,112 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-26 14:21:50,114 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:21:50 BoogieIcfgContainer [2023-08-26 14:21:50,114 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 14:21:50,116 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 14:21:50,116 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 14:21:50,137 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 14:21:50,137 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 02:21:48" (1/3) ... [2023-08-26 14:21:50,138 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43ae7736 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:21:50, skipping insertion in model container [2023-08-26 14:21:50,138 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:21:49" (2/3) ... [2023-08-26 14:21:50,138 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43ae7736 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:21:50, skipping insertion in model container [2023-08-26 14:21:50,138 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:21:50" (3/3) ... [2023-08-26 14:21:50,140 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2023-08-26 14:21:50,154 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 14:21:50,154 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2023-08-26 14:21:50,154 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 14:21:50,235 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 14:21:50,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 171 transitions, 358 flow [2023-08-26 14:21:50,367 INFO L124 PetriNetUnfolderBase]: 12/169 cut-off events. [2023-08-26 14:21:50,368 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 14:21:50,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 178 conditions, 169 events. 12/169 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 448 event pairs, 0 based on Foata normal form. 0/143 useless extension candidates. Maximal degree in co-relation 127. Up to 3 conditions per place. [2023-08-26 14:21:50,378 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 171 transitions, 358 flow [2023-08-26 14:21:50,386 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 160 transitions, 329 flow [2023-08-26 14:21:50,389 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 14:21:50,405 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 155 places, 160 transitions, 329 flow [2023-08-26 14:21:50,407 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 155 places, 160 transitions, 329 flow [2023-08-26 14:21:50,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 155 places, 160 transitions, 329 flow [2023-08-26 14:21:50,461 INFO L124 PetriNetUnfolderBase]: 12/160 cut-off events. [2023-08-26 14:21:50,461 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 14:21:50,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 160 events. 12/160 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 403 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 127. Up to 3 conditions per place. [2023-08-26 14:21:50,470 INFO L119 LiptonReduction]: Number of co-enabled transitions 8840 [2023-08-26 14:21:54,637 INFO L134 LiptonReduction]: Checked pairs total: 13733 [2023-08-26 14:21:54,638 INFO L136 LiptonReduction]: Total number of compositions: 178 [2023-08-26 14:21:54,651 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 14:21:54,657 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;@4337d4e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 14:21:54,657 INFO L358 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2023-08-26 14:21:54,658 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 14:21:54,658 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 14:21:54,658 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 14:21:54,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:21:54,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 14:21:54,659 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 14:21:54,663 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:21:54,663 INFO L85 PathProgramCache]: Analyzing trace with hash 724, now seen corresponding path program 1 times [2023-08-26 14:21:54,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:21:54,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973316124] [2023-08-26 14:21:54,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:21:54,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:21:54,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:21:54,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:21:54,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:21:54,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973316124] [2023-08-26 14:21:54,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973316124] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:21:54,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:21:54,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 14:21:54,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059645530] [2023-08-26 14:21:54,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:21:54,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 14:21:54,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:21:54,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 14:21:54,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 14:21:54,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 158 out of 349 [2023-08-26 14:21:54,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 44 transitions, 97 flow. Second operand has 2 states, 2 states have (on average 158.5) internal successors, (317), 2 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:54,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:21:54,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 158 of 349 [2023-08-26 14:21:54,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:21:55,031 INFO L124 PetriNetUnfolderBase]: 1250/1979 cut-off events. [2023-08-26 14:21:55,031 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2023-08-26 14:21:55,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3939 conditions, 1979 events. 1250/1979 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9271 event pairs, 994 based on Foata normal form. 0/1117 useless extension candidates. Maximal degree in co-relation 3692. Up to 1920 conditions per place. [2023-08-26 14:21:55,043 INFO L140 encePairwiseOnDemand]: 347/349 looper letters, 40 selfloop transitions, 0 changer transitions 0/42 dead transitions. [2023-08-26 14:21:55,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 42 transitions, 173 flow [2023-08-26 14:21:55,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 14:21:55,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 14:21:55,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 358 transitions. [2023-08-26 14:21:55,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5128939828080229 [2023-08-26 14:21:55,056 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 358 transitions. [2023-08-26 14:21:55,057 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 358 transitions. [2023-08-26 14:21:55,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:21:55,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 358 transitions. [2023-08-26 14:21:55,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 179.0) internal successors, (358), 2 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:55,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 349.0) internal successors, (1047), 3 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:55,067 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 349.0) internal successors, (1047), 3 states have internal predecessors, (1047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:55,069 INFO L175 Difference]: Start difference. First operand has 46 places, 44 transitions, 97 flow. Second operand 2 states and 358 transitions. [2023-08-26 14:21:55,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 42 transitions, 173 flow [2023-08-26 14:21:55,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 42 transitions, 168 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 14:21:55,073 INFO L231 Difference]: Finished difference. Result has 42 places, 42 transitions, 88 flow [2023-08-26 14:21:55,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=88, PETRI_PLACES=42, PETRI_TRANSITIONS=42} [2023-08-26 14:21:55,077 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -4 predicate places. [2023-08-26 14:21:55,077 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 42 transitions, 88 flow [2023-08-26 14:21:55,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 158.5) internal successors, (317), 2 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:55,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:21:55,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 14:21:55,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 14:21:55,078 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 14:21:55,079 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:21:55,079 INFO L85 PathProgramCache]: Analyzing trace with hash 711364, now seen corresponding path program 1 times [2023-08-26 14:21:55,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:21:55,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235191702] [2023-08-26 14:21:55,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:21:55,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:21:55,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:21:55,204 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 14:21:55,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:21:55,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235191702] [2023-08-26 14:21:55,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235191702] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:21:55,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:21:55,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 14:21:55,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192886613] [2023-08-26 14:21:55,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:21:55,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 14:21:55,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:21:55,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 14:21:55,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 14:21:55,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 349 [2023-08-26 14:21:55,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 42 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:55,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:21:55,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 349 [2023-08-26 14:21:55,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:21:55,378 INFO L124 PetriNetUnfolderBase]: 1223/1927 cut-off events. [2023-08-26 14:21:55,378 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-26 14:21:55,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3821 conditions, 1927 events. 1223/1927 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8934 event pairs, 972 based on Foata normal form. 0/1099 useless extension candidates. Maximal degree in co-relation 3818. Up to 1868 conditions per place. [2023-08-26 14:21:55,388 INFO L140 encePairwiseOnDemand]: 346/349 looper letters, 37 selfloop transitions, 1 changer transitions 0/40 dead transitions. [2023-08-26 14:21:55,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 40 transitions, 160 flow [2023-08-26 14:21:55,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 14:21:55,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 14:21:55,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 439 transitions. [2023-08-26 14:21:55,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4192932187201528 [2023-08-26 14:21:55,395 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 439 transitions. [2023-08-26 14:21:55,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 439 transitions. [2023-08-26 14:21:55,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:21:55,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 439 transitions. [2023-08-26 14:21:55,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:55,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:55,402 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:55,402 INFO L175 Difference]: Start difference. First operand has 42 places, 42 transitions, 88 flow. Second operand 3 states and 439 transitions. [2023-08-26 14:21:55,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 40 transitions, 160 flow [2023-08-26 14:21:55,404 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 40 transitions, 160 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 14:21:55,405 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 86 flow [2023-08-26 14:21:55,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2023-08-26 14:21:55,406 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -4 predicate places. [2023-08-26 14:21:55,408 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 86 flow [2023-08-26 14:21:55,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 134.0) internal successors, (402), 3 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:55,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:21:55,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 14:21:55,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 14:21:55,411 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 14:21:55,413 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:21:55,413 INFO L85 PathProgramCache]: Analyzing trace with hash 711365, now seen corresponding path program 1 times [2023-08-26 14:21:55,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:21:55,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969393861] [2023-08-26 14:21:55,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:21:55,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:21:55,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:21:55,535 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 14:21:55,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:21:55,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969393861] [2023-08-26 14:21:55,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969393861] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:21:55,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:21:55,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 14:21:55,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181229730] [2023-08-26 14:21:55,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:21:55,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 14:21:55,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:21:55,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 14:21:55,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 14:21:55,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 349 [2023-08-26 14:21:55,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:55,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:21:55,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 349 [2023-08-26 14:21:55,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:21:55,726 INFO L124 PetriNetUnfolderBase]: 1196/1875 cut-off events. [2023-08-26 14:21:55,726 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-26 14:21:55,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3720 conditions, 1875 events. 1196/1875 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8614 event pairs, 950 based on Foata normal form. 0/1081 useless extension candidates. Maximal degree in co-relation 3716. Up to 1817 conditions per place. [2023-08-26 14:21:55,735 INFO L140 encePairwiseOnDemand]: 346/349 looper letters, 35 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2023-08-26 14:21:55,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 38 transitions, 154 flow [2023-08-26 14:21:55,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 14:21:55,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 14:21:55,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 443 transitions. [2023-08-26 14:21:55,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42311365807067813 [2023-08-26 14:21:55,737 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 443 transitions. [2023-08-26 14:21:55,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 443 transitions. [2023-08-26 14:21:55,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:21:55,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 443 transitions. [2023-08-26 14:21:55,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:55,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:55,741 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:55,741 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 86 flow. Second operand 3 states and 443 transitions. [2023-08-26 14:21:55,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 38 transitions, 154 flow [2023-08-26 14:21:55,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 38 transitions, 153 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 14:21:55,744 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 83 flow [2023-08-26 14:21:55,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=83, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2023-08-26 14:21:55,745 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -5 predicate places. [2023-08-26 14:21:55,745 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 83 flow [2023-08-26 14:21:55,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:55,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:21:55,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 14:21:55,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 14:21:55,746 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 14:21:55,746 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:21:55,746 INFO L85 PathProgramCache]: Analyzing trace with hash 683639189, now seen corresponding path program 1 times [2023-08-26 14:21:55,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:21:55,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713271003] [2023-08-26 14:21:55,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:21:55,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:21:55,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:21:55,906 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 14:21:55,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:21:55,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713271003] [2023-08-26 14:21:55,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713271003] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:21:55,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:21:55,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 14:21:55,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49337050] [2023-08-26 14:21:55,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:21:55,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 14:21:55,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:21:55,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 14:21:55,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 14:21:55,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 131 out of 349 [2023-08-26 14:21:55,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 83 flow. Second operand has 4 states, 4 states have (on average 132.25) internal successors, (529), 4 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:55,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:21:55,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 131 of 349 [2023-08-26 14:21:55,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:21:56,038 INFO L124 PetriNetUnfolderBase]: 875/1397 cut-off events. [2023-08-26 14:21:56,039 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-26 14:21:56,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2779 conditions, 1397 events. 875/1397 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6146 event pairs, 688 based on Foata normal form. 0/868 useless extension candidates. Maximal degree in co-relation 2775. Up to 1353 conditions per place. [2023-08-26 14:21:56,046 INFO L140 encePairwiseOnDemand]: 347/349 looper letters, 34 selfloop transitions, 1 changer transitions 0/37 dead transitions. [2023-08-26 14:21:56,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 37 transitions, 151 flow [2023-08-26 14:21:56,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 14:21:56,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 14:21:56,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 429 transitions. [2023-08-26 14:21:56,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40974212034383956 [2023-08-26 14:21:56,048 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 429 transitions. [2023-08-26 14:21:56,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 429 transitions. [2023-08-26 14:21:56,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:21:56,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 429 transitions. [2023-08-26 14:21:56,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:56,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:56,052 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:56,052 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 83 flow. Second operand 3 states and 429 transitions. [2023-08-26 14:21:56,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 37 transitions, 151 flow [2023-08-26 14:21:56,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 37 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 14:21:56,055 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 82 flow [2023-08-26 14:21:56,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2023-08-26 14:21:56,056 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -5 predicate places. [2023-08-26 14:21:56,056 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 82 flow [2023-08-26 14:21:56,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 132.25) internal successors, (529), 4 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:56,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:21:56,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 14:21:56,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 14:21:56,057 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 14:21:56,058 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:21:56,058 INFO L85 PathProgramCache]: Analyzing trace with hash 683639188, now seen corresponding path program 1 times [2023-08-26 14:21:56,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:21:56,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254248634] [2023-08-26 14:21:56,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:21:56,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:21:56,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:21:56,117 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 14:21:56,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:21:56,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254248634] [2023-08-26 14:21:56,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254248634] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:21:56,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:21:56,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 14:21:56,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338571926] [2023-08-26 14:21:56,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:21:56,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 14:21:56,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:21:56,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 14:21:56,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 14:21:56,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 349 [2023-08-26 14:21:56,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 82 flow. Second operand has 4 states, 4 states have (on average 131.25) internal successors, (525), 4 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:56,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:21:56,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 349 [2023-08-26 14:21:56,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:21:56,217 INFO L124 PetriNetUnfolderBase]: 554/919 cut-off events. [2023-08-26 14:21:56,217 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-26 14:21:56,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1838 conditions, 919 events. 554/919 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3846 event pairs, 426 based on Foata normal form. 0/655 useless extension candidates. Maximal degree in co-relation 1834. Up to 889 conditions per place. [2023-08-26 14:21:56,222 INFO L140 encePairwiseOnDemand]: 347/349 looper letters, 33 selfloop transitions, 1 changer transitions 0/36 dead transitions. [2023-08-26 14:21:56,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 36 transitions, 148 flow [2023-08-26 14:21:56,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 14:21:56,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 14:21:56,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 425 transitions. [2023-08-26 14:21:56,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4059216809933142 [2023-08-26 14:21:56,224 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 425 transitions. [2023-08-26 14:21:56,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 425 transitions. [2023-08-26 14:21:56,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:21:56,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 425 transitions. [2023-08-26 14:21:56,226 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:56,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:56,228 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:56,228 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 82 flow. Second operand 3 states and 425 transitions. [2023-08-26 14:21:56,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 36 transitions, 148 flow [2023-08-26 14:21:56,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 36 transitions, 147 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 14:21:56,230 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 81 flow [2023-08-26 14:21:56,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2023-08-26 14:21:56,230 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -5 predicate places. [2023-08-26 14:21:56,231 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 81 flow [2023-08-26 14:21:56,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 131.25) internal successors, (525), 4 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:56,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:21:56,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 14:21:56,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 14:21:56,232 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 14:21:56,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:21:56,232 INFO L85 PathProgramCache]: Analyzing trace with hash -281769903, now seen corresponding path program 1 times [2023-08-26 14:21:56,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:21:56,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888399568] [2023-08-26 14:21:56,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:21:56,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:21:56,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:21:56,403 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 14:21:56,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:21:56,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888399568] [2023-08-26 14:21:56,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888399568] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:21:56,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:21:56,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 14:21:56,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357298065] [2023-08-26 14:21:56,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:21:56,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 14:21:56,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:21:56,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 14:21:56,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 14:21:56,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 349 [2023-08-26 14:21:56,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 81 flow. Second operand has 5 states, 5 states have (on average 131.2) internal successors, (656), 5 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:56,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:21:56,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 349 [2023-08-26 14:21:56,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:21:56,631 INFO L124 PetriNetUnfolderBase]: 629/1052 cut-off events. [2023-08-26 14:21:56,631 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-26 14:21:56,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2103 conditions, 1052 events. 629/1052 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4940 event pairs, 114 based on Foata normal form. 0/772 useless extension candidates. Maximal degree in co-relation 2099. Up to 668 conditions per place. [2023-08-26 14:21:56,636 INFO L140 encePairwiseOnDemand]: 344/349 looper letters, 68 selfloop transitions, 5 changer transitions 0/75 dead transitions. [2023-08-26 14:21:56,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 75 transitions, 310 flow [2023-08-26 14:21:56,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 14:21:56,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 14:21:56,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 724 transitions. [2023-08-26 14:21:56,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41489971346704874 [2023-08-26 14:21:56,639 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 724 transitions. [2023-08-26 14:21:56,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 724 transitions. [2023-08-26 14:21:56,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:21:56,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 724 transitions. [2023-08-26 14:21:56,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 144.8) internal successors, (724), 5 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:56,645 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 349.0) internal successors, (2094), 6 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:56,646 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 349.0) internal successors, (2094), 6 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:56,646 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 81 flow. Second operand 5 states and 724 transitions. [2023-08-26 14:21:56,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 75 transitions, 310 flow [2023-08-26 14:21:56,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 75 transitions, 309 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 14:21:56,649 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 90 flow [2023-08-26 14:21:56,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=90, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2023-08-26 14:21:56,651 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -3 predicate places. [2023-08-26 14:21:56,652 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 90 flow [2023-08-26 14:21:56,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 131.2) internal successors, (656), 5 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:56,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:21:56,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 14:21:56,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 14:21:56,653 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 14:21:56,653 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:21:56,653 INFO L85 PathProgramCache]: Analyzing trace with hash -281769902, now seen corresponding path program 1 times [2023-08-26 14:21:56,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:21:56,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703729790] [2023-08-26 14:21:56,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:21:56,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:21:56,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:21:56,947 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 14:21:56,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:21:56,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703729790] [2023-08-26 14:21:56,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703729790] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:21:56,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:21:56,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 14:21:56,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712035570] [2023-08-26 14:21:56,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:21:56,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 14:21:56,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:21:56,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 14:21:56,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 14:21:56,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 349 [2023-08-26 14:21:56,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 90 flow. Second operand has 5 states, 5 states have (on average 121.2) internal successors, (606), 5 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:56,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:21:56,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 349 [2023-08-26 14:21:56,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:21:57,191 INFO L124 PetriNetUnfolderBase]: 689/1124 cut-off events. [2023-08-26 14:21:57,192 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2023-08-26 14:21:57,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2408 conditions, 1124 events. 689/1124 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 4282 event pairs, 222 based on Foata normal form. 0/884 useless extension candidates. Maximal degree in co-relation 2404. Up to 883 conditions per place. [2023-08-26 14:21:57,197 INFO L140 encePairwiseOnDemand]: 342/349 looper letters, 61 selfloop transitions, 4 changer transitions 3/68 dead transitions. [2023-08-26 14:21:57,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 68 transitions, 299 flow [2023-08-26 14:21:57,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 14:21:57,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 14:21:57,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 673 transitions. [2023-08-26 14:21:57,200 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3856733524355301 [2023-08-26 14:21:57,200 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 673 transitions. [2023-08-26 14:21:57,200 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 673 transitions. [2023-08-26 14:21:57,200 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:21:57,200 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 673 transitions. [2023-08-26 14:21:57,202 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 134.6) internal successors, (673), 5 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:57,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 349.0) internal successors, (2094), 6 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:57,205 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 349.0) internal successors, (2094), 6 states have internal predecessors, (2094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:57,205 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 90 flow. Second operand 5 states and 673 transitions. [2023-08-26 14:21:57,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 68 transitions, 299 flow [2023-08-26 14:21:57,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 68 transitions, 293 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 14:21:57,207 INFO L231 Difference]: Finished difference. Result has 48 places, 38 transitions, 118 flow [2023-08-26 14:21:57,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=118, PETRI_PLACES=48, PETRI_TRANSITIONS=38} [2023-08-26 14:21:57,207 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 2 predicate places. [2023-08-26 14:21:57,208 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 118 flow [2023-08-26 14:21:57,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 121.2) internal successors, (606), 5 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:57,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:21:57,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:21:57,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 14:21:57,208 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t1Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 14:21:57,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:21:57,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1293271885, now seen corresponding path program 1 times [2023-08-26 14:21:57,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:21:57,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887649083] [2023-08-26 14:21:57,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:21:57,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:21:57,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:21:57,244 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 14:21:57,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:21:57,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887649083] [2023-08-26 14:21:57,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887649083] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:21:57,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:21:57,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 14:21:57,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903928450] [2023-08-26 14:21:57,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:21:57,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 14:21:57,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:21:57,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 14:21:57,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 14:21:57,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 349 [2023-08-26 14:21:57,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:57,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:21:57,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 349 [2023-08-26 14:21:57,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:21:57,371 INFO L124 PetriNetUnfolderBase]: 615/1050 cut-off events. [2023-08-26 14:21:57,372 INFO L125 PetriNetUnfolderBase]: For 230/230 co-relation queries the response was YES. [2023-08-26 14:21:57,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2402 conditions, 1050 events. 615/1050 cut-off events. For 230/230 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4603 event pairs, 276 based on Foata normal form. 0/866 useless extension candidates. Maximal degree in co-relation 2395. Up to 918 conditions per place. [2023-08-26 14:21:57,377 INFO L140 encePairwiseOnDemand]: 346/349 looper letters, 52 selfloop transitions, 3 changer transitions 0/57 dead transitions. [2023-08-26 14:21:57,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 57 transitions, 274 flow [2023-08-26 14:21:57,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 14:21:57,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 14:21:57,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 509 transitions. [2023-08-26 14:21:57,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48615090735434574 [2023-08-26 14:21:57,380 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 509 transitions. [2023-08-26 14:21:57,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 509 transitions. [2023-08-26 14:21:57,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:21:57,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 509 transitions. [2023-08-26 14:21:57,381 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 169.66666666666666) internal successors, (509), 3 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:57,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:57,383 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:57,383 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 118 flow. Second operand 3 states and 509 transitions. [2023-08-26 14:21:57,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 57 transitions, 274 flow [2023-08-26 14:21:57,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 57 transitions, 270 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 14:21:57,386 INFO L231 Difference]: Finished difference. Result has 49 places, 39 transitions, 129 flow [2023-08-26 14:21:57,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=49, PETRI_TRANSITIONS=39} [2023-08-26 14:21:57,386 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 3 predicate places. [2023-08-26 14:21:57,386 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 39 transitions, 129 flow [2023-08-26 14:21:57,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:57,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:21:57,387 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:21:57,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 14:21:57,387 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 14:21:57,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:21:57,388 INFO L85 PathProgramCache]: Analyzing trace with hash -2004663441, now seen corresponding path program 1 times [2023-08-26 14:21:57,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:21:57,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771709301] [2023-08-26 14:21:57,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:21:57,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:21:57,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:21:57,740 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:21:57,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:21:57,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771709301] [2023-08-26 14:21:57,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771709301] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 14:21:57,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691536093] [2023-08-26 14:21:57,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:21:57,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 14:21:57,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 14:21:57,744 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 14:21:57,749 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 14:21:57,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:21:57,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 40 conjunts are in the unsatisfiable core [2023-08-26 14:21:57,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 14:21:57,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 14:21:57,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 14:21:57,952 INFO L322 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-26 14:21:57,953 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 23 [2023-08-26 14:21:58,003 INFO L322 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-26 14:21:58,004 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-08-26 14:21:58,222 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:21:58,222 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 14:21:58,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:21:58,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691536093] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 14:21:58,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 14:21:58,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 19 [2023-08-26 14:21:58,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443774824] [2023-08-26 14:21:58,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 14:21:58,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-26 14:21:58,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:21:58,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-26 14:21:58,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2023-08-26 14:21:58,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 118 out of 349 [2023-08-26 14:21:58,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 39 transitions, 129 flow. Second operand has 21 states, 21 states have (on average 119.85714285714286) internal successors, (2517), 21 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:58,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:21:58,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 118 of 349 [2023-08-26 14:21:58,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:21:59,506 INFO L124 PetriNetUnfolderBase]: 1693/2768 cut-off events. [2023-08-26 14:21:59,506 INFO L125 PetriNetUnfolderBase]: For 974/974 co-relation queries the response was YES. [2023-08-26 14:21:59,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6756 conditions, 2768 events. 1693/2768 cut-off events. For 974/974 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 12943 event pairs, 192 based on Foata normal form. 66/2402 useless extension candidates. Maximal degree in co-relation 6748. Up to 1025 conditions per place. [2023-08-26 14:21:59,522 INFO L140 encePairwiseOnDemand]: 339/349 looper letters, 195 selfloop transitions, 22 changer transitions 3/220 dead transitions. [2023-08-26 14:21:59,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 220 transitions, 1043 flow [2023-08-26 14:21:59,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-26 14:21:59,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-26 14:21:59,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1881 transitions. [2023-08-26 14:21:59,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3849774866966844 [2023-08-26 14:21:59,528 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1881 transitions. [2023-08-26 14:21:59,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1881 transitions. [2023-08-26 14:21:59,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:21:59,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1881 transitions. [2023-08-26 14:21:59,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 134.35714285714286) internal successors, (1881), 14 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:59,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 349.0) internal successors, (5235), 15 states have internal predecessors, (5235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:59,539 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 349.0) internal successors, (5235), 15 states have internal predecessors, (5235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:59,539 INFO L175 Difference]: Start difference. First operand has 49 places, 39 transitions, 129 flow. Second operand 14 states and 1881 transitions. [2023-08-26 14:21:59,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 220 transitions, 1043 flow [2023-08-26 14:21:59,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 220 transitions, 1034 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 14:21:59,546 INFO L231 Difference]: Finished difference. Result has 68 places, 58 transitions, 295 flow [2023-08-26 14:21:59,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=295, PETRI_PLACES=68, PETRI_TRANSITIONS=58} [2023-08-26 14:21:59,547 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 22 predicate places. [2023-08-26 14:21:59,547 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 58 transitions, 295 flow [2023-08-26 14:21:59,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 119.85714285714286) internal successors, (2517), 21 states have internal predecessors, (2517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:59,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:21:59,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:21:59,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-26 14:21:59,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 14:21:59,756 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 14:21:59,757 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:21:59,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1318318509, now seen corresponding path program 1 times [2023-08-26 14:21:59,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:21:59,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947638246] [2023-08-26 14:21:59,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:21:59,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:21:59,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:21:59,817 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 14:21:59,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:21:59,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947638246] [2023-08-26 14:21:59,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947638246] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:21:59,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:21:59,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 14:21:59,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030969170] [2023-08-26 14:21:59,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:21:59,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 14:21:59,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:21:59,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 14:21:59,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 14:21:59,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 349 [2023-08-26 14:21:59,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 58 transitions, 295 flow. Second operand has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:59,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:21:59,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 349 [2023-08-26 14:21:59,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:21:59,965 INFO L124 PetriNetUnfolderBase]: 509/978 cut-off events. [2023-08-26 14:21:59,965 INFO L125 PetriNetUnfolderBase]: For 868/868 co-relation queries the response was YES. [2023-08-26 14:21:59,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2708 conditions, 978 events. 509/978 cut-off events. For 868/868 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 4195 event pairs, 86 based on Foata normal form. 42/946 useless extension candidates. Maximal degree in co-relation 2693. Up to 691 conditions per place. [2023-08-26 14:21:59,975 INFO L140 encePairwiseOnDemand]: 344/349 looper letters, 46 selfloop transitions, 9 changer transitions 0/59 dead transitions. [2023-08-26 14:21:59,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 59 transitions, 384 flow [2023-08-26 14:21:59,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 14:21:59,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 14:21:59,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 485 transitions. [2023-08-26 14:21:59,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46322827125119387 [2023-08-26 14:21:59,978 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 485 transitions. [2023-08-26 14:21:59,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 485 transitions. [2023-08-26 14:21:59,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:21:59,978 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 485 transitions. [2023-08-26 14:21:59,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:59,981 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:59,981 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:59,981 INFO L175 Difference]: Start difference. First operand has 68 places, 58 transitions, 295 flow. Second operand 3 states and 485 transitions. [2023-08-26 14:21:59,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 59 transitions, 384 flow [2023-08-26 14:21:59,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 59 transitions, 352 flow, removed 12 selfloop flow, removed 4 redundant places. [2023-08-26 14:21:59,989 INFO L231 Difference]: Finished difference. Result has 64 places, 50 transitions, 239 flow [2023-08-26 14:21:59,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=239, PETRI_PLACES=64, PETRI_TRANSITIONS=50} [2023-08-26 14:21:59,990 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 18 predicate places. [2023-08-26 14:21:59,990 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 50 transitions, 239 flow [2023-08-26 14:21:59,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:21:59,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:21:59,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:21:59,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 14:21:59,991 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 14:21:59,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:21:59,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1574545704, now seen corresponding path program 1 times [2023-08-26 14:21:59,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:21:59,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961870341] [2023-08-26 14:21:59,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:21:59,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:22:00,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:22:00,093 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 14:22:00,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:22:00,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961870341] [2023-08-26 14:22:00,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961870341] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:22:00,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:22:00,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 14:22:00,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116650668] [2023-08-26 14:22:00,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:22:00,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 14:22:00,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:22:00,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 14:22:00,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-26 14:22:00,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 349 [2023-08-26 14:22:00,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 50 transitions, 239 flow. Second operand has 7 states, 7 states have (on average 129.57142857142858) internal successors, (907), 7 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:00,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:22:00,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 349 [2023-08-26 14:22:00,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:22:00,368 INFO L124 PetriNetUnfolderBase]: 647/1228 cut-off events. [2023-08-26 14:22:00,368 INFO L125 PetriNetUnfolderBase]: For 553/553 co-relation queries the response was YES. [2023-08-26 14:22:00,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3349 conditions, 1228 events. 647/1228 cut-off events. For 553/553 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 5381 event pairs, 69 based on Foata normal form. 0/1210 useless extension candidates. Maximal degree in co-relation 3334. Up to 544 conditions per place. [2023-08-26 14:22:00,378 INFO L140 encePairwiseOnDemand]: 341/349 looper letters, 67 selfloop transitions, 20 changer transitions 3/94 dead transitions. [2023-08-26 14:22:00,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 94 transitions, 589 flow [2023-08-26 14:22:00,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-26 14:22:00,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-26 14:22:00,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1090 transitions. [2023-08-26 14:22:00,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39040114613180515 [2023-08-26 14:22:00,383 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1090 transitions. [2023-08-26 14:22:00,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1090 transitions. [2023-08-26 14:22:00,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:22:00,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1090 transitions. [2023-08-26 14:22:00,385 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 136.25) internal successors, (1090), 8 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:00,389 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 349.0) internal successors, (3141), 9 states have internal predecessors, (3141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:00,389 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 349.0) internal successors, (3141), 9 states have internal predecessors, (3141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:00,390 INFO L175 Difference]: Start difference. First operand has 64 places, 50 transitions, 239 flow. Second operand 8 states and 1090 transitions. [2023-08-26 14:22:00,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 94 transitions, 589 flow [2023-08-26 14:22:00,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 94 transitions, 568 flow, removed 2 selfloop flow, removed 1 redundant places. [2023-08-26 14:22:00,396 INFO L231 Difference]: Finished difference. Result has 71 places, 58 transitions, 339 flow [2023-08-26 14:22:00,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=339, PETRI_PLACES=71, PETRI_TRANSITIONS=58} [2023-08-26 14:22:00,397 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 25 predicate places. [2023-08-26 14:22:00,397 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 58 transitions, 339 flow [2023-08-26 14:22:00,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 129.57142857142858) internal successors, (907), 7 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:00,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:22:00,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:22:00,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 14:22:00,398 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 14:22:00,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:22:00,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1686574283, now seen corresponding path program 1 times [2023-08-26 14:22:00,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:22:00,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010785304] [2023-08-26 14:22:00,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:22:00,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:22:00,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:22:00,754 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 14:22:00,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:22:00,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010785304] [2023-08-26 14:22:00,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010785304] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:22:00,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:22:00,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-08-26 14:22:00,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717811399] [2023-08-26 14:22:00,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:22:00,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 14:22:00,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:22:00,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 14:22:00,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-08-26 14:22:00,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 349 [2023-08-26 14:22:00,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 58 transitions, 339 flow. Second operand has 13 states, 13 states have (on average 112.46153846153847) internal successors, (1462), 13 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:00,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:22:00,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 349 [2023-08-26 14:22:00,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:22:01,466 INFO L124 PetriNetUnfolderBase]: 874/1589 cut-off events. [2023-08-26 14:22:01,466 INFO L125 PetriNetUnfolderBase]: For 785/785 co-relation queries the response was YES. [2023-08-26 14:22:01,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4537 conditions, 1589 events. 874/1589 cut-off events. For 785/785 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 7195 event pairs, 192 based on Foata normal form. 12/1537 useless extension candidates. Maximal degree in co-relation 4519. Up to 944 conditions per place. [2023-08-26 14:22:01,473 INFO L140 encePairwiseOnDemand]: 335/349 looper letters, 138 selfloop transitions, 16 changer transitions 3/157 dead transitions. [2023-08-26 14:22:01,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 157 transitions, 984 flow [2023-08-26 14:22:01,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-26 14:22:01,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-26 14:22:01,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1588 transitions. [2023-08-26 14:22:01,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3500110204981265 [2023-08-26 14:22:01,478 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1588 transitions. [2023-08-26 14:22:01,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1588 transitions. [2023-08-26 14:22:01,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:22:01,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1588 transitions. [2023-08-26 14:22:01,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 122.15384615384616) internal successors, (1588), 13 states have internal predecessors, (1588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:01,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 349.0) internal successors, (4886), 14 states have internal predecessors, (4886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:01,489 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 349.0) internal successors, (4886), 14 states have internal predecessors, (4886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:01,489 INFO L175 Difference]: Start difference. First operand has 71 places, 58 transitions, 339 flow. Second operand 13 states and 1588 transitions. [2023-08-26 14:22:01,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 157 transitions, 984 flow [2023-08-26 14:22:01,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 157 transitions, 916 flow, removed 11 selfloop flow, removed 4 redundant places. [2023-08-26 14:22:01,495 INFO L231 Difference]: Finished difference. Result has 85 places, 67 transitions, 414 flow [2023-08-26 14:22:01,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=414, PETRI_PLACES=85, PETRI_TRANSITIONS=67} [2023-08-26 14:22:01,496 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 39 predicate places. [2023-08-26 14:22:01,496 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 67 transitions, 414 flow [2023-08-26 14:22:01,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 112.46153846153847) internal successors, (1462), 13 states have internal predecessors, (1462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:01,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:22:01,497 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-08-26 14:22:01,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-26 14:22:01,497 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t1Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 14:22:01,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:22:01,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1145158303, now seen corresponding path program 1 times [2023-08-26 14:22:01,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:22:01,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597849955] [2023-08-26 14:22:01,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:22:01,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:22:01,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:22:01,588 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:22:01,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:22:01,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597849955] [2023-08-26 14:22:01,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597849955] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 14:22:01,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444602162] [2023-08-26 14:22:01,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:22:01,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 14:22:01,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 14:22:01,593 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 14:22:01,596 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 14:22:01,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:22:01,700 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 14:22:01,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 14:22:01,744 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:22:01,744 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 14:22:01,797 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:22:01,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444602162] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 14:22:01,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 14:22:01,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-26 14:22:01,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12198753] [2023-08-26 14:22:01,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 14:22:01,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-26 14:22:01,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:22:01,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-26 14:22:01,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-08-26 14:22:01,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 349 [2023-08-26 14:22:01,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 67 transitions, 414 flow. Second operand has 14 states, 14 states have (on average 146.42857142857142) internal successors, (2050), 14 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:01,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:22:01,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 349 [2023-08-26 14:22:01,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:22:02,358 INFO L124 PetriNetUnfolderBase]: 1748/3197 cut-off events. [2023-08-26 14:22:02,359 INFO L125 PetriNetUnfolderBase]: For 2452/2452 co-relation queries the response was YES. [2023-08-26 14:22:02,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9365 conditions, 3197 events. 1748/3197 cut-off events. For 2452/2452 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 15295 event pairs, 452 based on Foata normal form. 92/3249 useless extension candidates. Maximal degree in co-relation 9341. Up to 756 conditions per place. [2023-08-26 14:22:02,380 INFO L140 encePairwiseOnDemand]: 341/349 looper letters, 196 selfloop transitions, 41 changer transitions 3/240 dead transitions. [2023-08-26 14:22:02,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 240 transitions, 1690 flow [2023-08-26 14:22:02,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-26 14:22:02,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-26 14:22:02,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2049 transitions. [2023-08-26 14:22:02,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45162001322459777 [2023-08-26 14:22:02,386 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2049 transitions. [2023-08-26 14:22:02,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2049 transitions. [2023-08-26 14:22:02,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:22:02,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2049 transitions. [2023-08-26 14:22:02,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 157.6153846153846) internal successors, (2049), 13 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:02,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 349.0) internal successors, (4886), 14 states have internal predecessors, (4886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:02,410 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 349.0) internal successors, (4886), 14 states have internal predecessors, (4886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:02,410 INFO L175 Difference]: Start difference. First operand has 85 places, 67 transitions, 414 flow. Second operand 13 states and 2049 transitions. [2023-08-26 14:22:02,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 240 transitions, 1690 flow [2023-08-26 14:22:02,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 240 transitions, 1674 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-26 14:22:02,427 INFO L231 Difference]: Finished difference. Result has 100 places, 98 transitions, 801 flow [2023-08-26 14:22:02,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=801, PETRI_PLACES=100, PETRI_TRANSITIONS=98} [2023-08-26 14:22:02,429 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 54 predicate places. [2023-08-26 14:22:02,429 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 98 transitions, 801 flow [2023-08-26 14:22:02,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 146.42857142857142) internal successors, (2050), 14 states have internal predecessors, (2050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:02,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:22:02,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:22:02,438 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 14:22:02,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-26 14:22:02,635 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 14:22:02,636 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:22:02,636 INFO L85 PathProgramCache]: Analyzing trace with hash -309886205, now seen corresponding path program 1 times [2023-08-26 14:22:02,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:22:02,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445151685] [2023-08-26 14:22:02,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:22:02,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:22:02,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:22:03,278 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 14:22:03,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:22:03,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445151685] [2023-08-26 14:22:03,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445151685] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:22:03,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:22:03,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-26 14:22:03,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010341339] [2023-08-26 14:22:03,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:22:03,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-26 14:22:03,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:22:03,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-26 14:22:03,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2023-08-26 14:22:03,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 349 [2023-08-26 14:22:03,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 98 transitions, 801 flow. Second operand has 15 states, 15 states have (on average 106.4) internal successors, (1596), 15 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:03,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:22:03,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 349 [2023-08-26 14:22:03,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:22:04,610 INFO L124 PetriNetUnfolderBase]: 2012/3687 cut-off events. [2023-08-26 14:22:04,611 INFO L125 PetriNetUnfolderBase]: For 4642/4642 co-relation queries the response was YES. [2023-08-26 14:22:04,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11685 conditions, 3687 events. 2012/3687 cut-off events. For 4642/4642 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 18482 event pairs, 626 based on Foata normal form. 0/3643 useless extension candidates. Maximal degree in co-relation 11653. Up to 3035 conditions per place. [2023-08-26 14:22:04,636 INFO L140 encePairwiseOnDemand]: 333/349 looper letters, 173 selfloop transitions, 27 changer transitions 4/204 dead transitions. [2023-08-26 14:22:04,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 204 transitions, 1609 flow [2023-08-26 14:22:04,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-26 14:22:04,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-26 14:22:04,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2033 transitions. [2023-08-26 14:22:04,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3236230499840815 [2023-08-26 14:22:04,648 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2033 transitions. [2023-08-26 14:22:04,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2033 transitions. [2023-08-26 14:22:04,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:22:04,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2033 transitions. [2023-08-26 14:22:04,654 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 112.94444444444444) internal successors, (2033), 18 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:04,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 349.0) internal successors, (6631), 19 states have internal predecessors, (6631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:04,664 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 349.0) internal successors, (6631), 19 states have internal predecessors, (6631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:04,665 INFO L175 Difference]: Start difference. First operand has 100 places, 98 transitions, 801 flow. Second operand 18 states and 2033 transitions. [2023-08-26 14:22:04,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 204 transitions, 1609 flow [2023-08-26 14:22:04,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 204 transitions, 1524 flow, removed 39 selfloop flow, removed 2 redundant places. [2023-08-26 14:22:04,689 INFO L231 Difference]: Finished difference. Result has 123 places, 121 transitions, 943 flow [2023-08-26 14:22:04,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=731, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=943, PETRI_PLACES=123, PETRI_TRANSITIONS=121} [2023-08-26 14:22:04,690 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 77 predicate places. [2023-08-26 14:22:04,690 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 121 transitions, 943 flow [2023-08-26 14:22:04,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 106.4) internal successors, (1596), 15 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:04,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:22:04,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:22:04,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 14:22:04,691 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 14:22:04,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:22:04,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1697843001, now seen corresponding path program 2 times [2023-08-26 14:22:04,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:22:04,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024343636] [2023-08-26 14:22:04,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:22:04,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:22:04,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:22:05,346 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 14:22:05,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:22:05,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024343636] [2023-08-26 14:22:05,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024343636] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:22:05,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:22:05,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-08-26 14:22:05,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598256792] [2023-08-26 14:22:05,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:22:05,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-26 14:22:05,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:22:05,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-26 14:22:05,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-08-26 14:22:05,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 349 [2023-08-26 14:22:05,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 121 transitions, 943 flow. Second operand has 11 states, 11 states have (on average 116.81818181818181) internal successors, (1285), 11 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:05,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:22:05,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 349 [2023-08-26 14:22:05,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:22:06,377 INFO L124 PetriNetUnfolderBase]: 2006/3833 cut-off events. [2023-08-26 14:22:06,377 INFO L125 PetriNetUnfolderBase]: For 4290/4290 co-relation queries the response was YES. [2023-08-26 14:22:06,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11932 conditions, 3833 events. 2006/3833 cut-off events. For 4290/4290 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 20709 event pairs, 611 based on Foata normal form. 0/3776 useless extension candidates. Maximal degree in co-relation 11893. Up to 2244 conditions per place. [2023-08-26 14:22:06,402 INFO L140 encePairwiseOnDemand]: 340/349 looper letters, 145 selfloop transitions, 19 changer transitions 3/184 dead transitions. [2023-08-26 14:22:06,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 184 transitions, 1509 flow [2023-08-26 14:22:06,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 14:22:06,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 14:22:06,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1143 transitions. [2023-08-26 14:22:06,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3638968481375358 [2023-08-26 14:22:06,406 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1143 transitions. [2023-08-26 14:22:06,406 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1143 transitions. [2023-08-26 14:22:06,407 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:22:06,407 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1143 transitions. [2023-08-26 14:22:06,409 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 127.0) internal successors, (1143), 9 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:06,413 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 349.0) internal successors, (3490), 10 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:06,414 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 349.0) internal successors, (3490), 10 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:06,414 INFO L175 Difference]: Start difference. First operand has 123 places, 121 transitions, 943 flow. Second operand 9 states and 1143 transitions. [2023-08-26 14:22:06,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 184 transitions, 1509 flow [2023-08-26 14:22:06,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 184 transitions, 1498 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 14:22:06,440 INFO L231 Difference]: Finished difference. Result has 130 places, 125 transitions, 1007 flow [2023-08-26 14:22:06,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=932, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1007, PETRI_PLACES=130, PETRI_TRANSITIONS=125} [2023-08-26 14:22:06,441 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 84 predicate places. [2023-08-26 14:22:06,441 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 125 transitions, 1007 flow [2023-08-26 14:22:06,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 116.81818181818181) internal successors, (1285), 11 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:06,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:22:06,441 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:22:06,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 14:22:06,441 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 14:22:06,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:22:06,442 INFO L85 PathProgramCache]: Analyzing trace with hash -623392431, now seen corresponding path program 1 times [2023-08-26 14:22:06,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:22:06,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238666087] [2023-08-26 14:22:06,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:22:06,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:22:06,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:22:06,480 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-26 14:22:06,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:22:06,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238666087] [2023-08-26 14:22:06,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238666087] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:22:06,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:22:06,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 14:22:06,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663632237] [2023-08-26 14:22:06,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:22:06,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 14:22:06,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:22:06,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 14:22:06,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 14:22:06,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 349 [2023-08-26 14:22:06,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 125 transitions, 1007 flow. Second operand has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:06,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:22:06,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 349 [2023-08-26 14:22:06,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:22:07,045 INFO L124 PetriNetUnfolderBase]: 2146/3975 cut-off events. [2023-08-26 14:22:07,046 INFO L125 PetriNetUnfolderBase]: For 4845/4845 co-relation queries the response was YES. [2023-08-26 14:22:07,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12794 conditions, 3975 events. 2146/3975 cut-off events. For 4845/4845 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 20560 event pairs, 1342 based on Foata normal form. 90/4035 useless extension candidates. Maximal degree in co-relation 12752. Up to 2912 conditions per place. [2023-08-26 14:22:07,069 INFO L140 encePairwiseOnDemand]: 343/349 looper letters, 116 selfloop transitions, 18 changer transitions 0/134 dead transitions. [2023-08-26 14:22:07,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 134 transitions, 1289 flow [2023-08-26 14:22:07,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 14:22:07,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 14:22:07,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 489 transitions. [2023-08-26 14:22:07,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4670487106017192 [2023-08-26 14:22:07,071 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 489 transitions. [2023-08-26 14:22:07,071 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 489 transitions. [2023-08-26 14:22:07,071 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:22:07,071 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 489 transitions. [2023-08-26 14:22:07,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:07,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:07,074 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 349.0) internal successors, (1396), 4 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:07,074 INFO L175 Difference]: Start difference. First operand has 130 places, 125 transitions, 1007 flow. Second operand 3 states and 489 transitions. [2023-08-26 14:22:07,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 134 transitions, 1289 flow [2023-08-26 14:22:07,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 134 transitions, 1252 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-08-26 14:22:07,097 INFO L231 Difference]: Finished difference. Result has 129 places, 115 transitions, 981 flow [2023-08-26 14:22:07,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=981, PETRI_PLACES=129, PETRI_TRANSITIONS=115} [2023-08-26 14:22:07,097 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 83 predicate places. [2023-08-26 14:22:07,097 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 115 transitions, 981 flow [2023-08-26 14:22:07,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.66666666666666) internal successors, (452), 3 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:07,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:22:07,098 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:22:07,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 14:22:07,098 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 14:22:07,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:22:07,099 INFO L85 PathProgramCache]: Analyzing trace with hash 449939420, now seen corresponding path program 1 times [2023-08-26 14:22:07,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:22:07,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992518305] [2023-08-26 14:22:07,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:22:07,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:22:07,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:22:07,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:22:07,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:22:07,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992518305] [2023-08-26 14:22:07,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992518305] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 14:22:07,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202528104] [2023-08-26 14:22:07,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:22:07,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 14:22:07,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 14:22:07,545 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 14:22:07,581 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 14:22:07,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:22:07,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-26 14:22:07,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 14:22:08,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:22:08,083 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 14:22:08,403 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 14:22:08,404 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 39 [2023-08-26 14:22:08,575 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:22:08,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202528104] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 14:22:08,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 14:22:08,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 38 [2023-08-26 14:22:08,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565223097] [2023-08-26 14:22:08,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 14:22:08,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-26 14:22:08,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:22:08,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-26 14:22:08,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1391, Unknown=0, NotChecked=0, Total=1560 [2023-08-26 14:22:08,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 349 [2023-08-26 14:22:08,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 115 transitions, 981 flow. Second operand has 40 states, 40 states have (on average 112.8) internal successors, (4512), 40 states have internal predecessors, (4512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:08,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:22:08,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 349 [2023-08-26 14:22:08,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:22:13,171 INFO L124 PetriNetUnfolderBase]: 2784/5167 cut-off events. [2023-08-26 14:22:13,172 INFO L125 PetriNetUnfolderBase]: For 8480/8480 co-relation queries the response was YES. [2023-08-26 14:22:13,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16716 conditions, 5167 events. 2784/5167 cut-off events. For 8480/8480 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 28413 event pairs, 258 based on Foata normal form. 66/5183 useless extension candidates. Maximal degree in co-relation 16673. Up to 1008 conditions per place. [2023-08-26 14:22:13,207 INFO L140 encePairwiseOnDemand]: 335/349 looper letters, 315 selfloop transitions, 133 changer transitions 9/457 dead transitions. [2023-08-26 14:22:13,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 457 transitions, 3224 flow [2023-08-26 14:22:13,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-08-26 14:22:13,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2023-08-26 14:22:13,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 7163 transitions. [2023-08-26 14:22:13,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33646484099769836 [2023-08-26 14:22:13,219 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 7163 transitions. [2023-08-26 14:22:13,219 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 7163 transitions. [2023-08-26 14:22:13,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:22:13,222 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 7163 transitions. [2023-08-26 14:22:13,233 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 117.42622950819673) internal successors, (7163), 61 states have internal predecessors, (7163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:13,256 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 349.0) internal successors, (21638), 62 states have internal predecessors, (21638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:13,262 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 349.0) internal successors, (21638), 62 states have internal predecessors, (21638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:13,262 INFO L175 Difference]: Start difference. First operand has 129 places, 115 transitions, 981 flow. Second operand 61 states and 7163 transitions. [2023-08-26 14:22:13,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 457 transitions, 3224 flow [2023-08-26 14:22:13,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 457 transitions, 3120 flow, removed 21 selfloop flow, removed 2 redundant places. [2023-08-26 14:22:13,300 INFO L231 Difference]: Finished difference. Result has 194 places, 182 transitions, 1733 flow [2023-08-26 14:22:13,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=923, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=1733, PETRI_PLACES=194, PETRI_TRANSITIONS=182} [2023-08-26 14:22:13,300 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 148 predicate places. [2023-08-26 14:22:13,301 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 182 transitions, 1733 flow [2023-08-26 14:22:13,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 112.8) internal successors, (4512), 40 states have internal predecessors, (4512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:13,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:22:13,302 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:22:13,311 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 14:22:13,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 14:22:13,508 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t1Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 14:22:13,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:22:13,509 INFO L85 PathProgramCache]: Analyzing trace with hash -726554869, now seen corresponding path program 1 times [2023-08-26 14:22:13,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:22:13,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78792054] [2023-08-26 14:22:13,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:22:13,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:22:13,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:22:13,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:22:13,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:22:13,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78792054] [2023-08-26 14:22:13,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78792054] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 14:22:13,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328725719] [2023-08-26 14:22:13,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:22:13,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 14:22:13,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 14:22:13,592 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 14:22:13,612 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 14:22:13,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:22:13,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 14:22:13,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 14:22:13,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-26 14:22:13,743 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 14:22:13,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328725719] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:22:13,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 14:22:13,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2023-08-26 14:22:13,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074332947] [2023-08-26 14:22:13,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:22:13,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 14:22:13,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:22:13,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 14:22:13,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-08-26 14:22:13,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 349 [2023-08-26 14:22:13,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 182 transitions, 1733 flow. Second operand has 6 states, 6 states have (on average 144.83333333333334) internal successors, (869), 6 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:13,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:22:13,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 349 [2023-08-26 14:22:13,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:22:14,389 INFO L124 PetriNetUnfolderBase]: 2330/4353 cut-off events. [2023-08-26 14:22:14,389 INFO L125 PetriNetUnfolderBase]: For 8204/8204 co-relation queries the response was YES. [2023-08-26 14:22:14,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15304 conditions, 4353 events. 2330/4353 cut-off events. For 8204/8204 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 23251 event pairs, 834 based on Foata normal form. 44/4363 useless extension candidates. Maximal degree in co-relation 15254. Up to 2082 conditions per place. [2023-08-26 14:22:14,415 INFO L140 encePairwiseOnDemand]: 341/349 looper letters, 186 selfloop transitions, 37 changer transitions 0/223 dead transitions. [2023-08-26 14:22:14,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 223 transitions, 2330 flow [2023-08-26 14:22:14,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 14:22:14,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 14:22:14,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 935 transitions. [2023-08-26 14:22:14,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651384909264563 [2023-08-26 14:22:14,418 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 935 transitions. [2023-08-26 14:22:14,418 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 935 transitions. [2023-08-26 14:22:14,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:22:14,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 935 transitions. [2023-08-26 14:22:14,420 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 155.83333333333334) internal successors, (935), 6 states have internal predecessors, (935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:14,422 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 349.0) internal successors, (2443), 7 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:14,422 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 349.0) internal successors, (2443), 7 states have internal predecessors, (2443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:14,422 INFO L175 Difference]: Start difference. First operand has 194 places, 182 transitions, 1733 flow. Second operand 6 states and 935 transitions. [2023-08-26 14:22:14,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 223 transitions, 2330 flow [2023-08-26 14:22:14,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 223 transitions, 1894 flow, removed 152 selfloop flow, removed 24 redundant places. [2023-08-26 14:22:14,479 INFO L231 Difference]: Finished difference. Result has 170 places, 167 transitions, 1332 flow [2023-08-26 14:22:14,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=1124, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1332, PETRI_PLACES=170, PETRI_TRANSITIONS=167} [2023-08-26 14:22:14,480 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 124 predicate places. [2023-08-26 14:22:14,480 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 167 transitions, 1332 flow [2023-08-26 14:22:14,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 144.83333333333334) internal successors, (869), 6 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:14,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:22:14,480 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:22:14,489 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 14:22:14,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-26 14:22:14,686 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 14:22:14,687 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:22:14,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1045689208, now seen corresponding path program 2 times [2023-08-26 14:22:14,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:22:14,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759372697] [2023-08-26 14:22:14,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:22:14,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:22:14,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:22:15,046 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:22:15,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:22:15,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759372697] [2023-08-26 14:22:15,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759372697] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 14:22:15,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215923112] [2023-08-26 14:22:15,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 14:22:15,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 14:22:15,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 14:22:15,048 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 14:22:15,068 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 14:22:15,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-26 14:22:15,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 14:22:15,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 31 conjunts are in the unsatisfiable core [2023-08-26 14:22:15,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 14:22:15,500 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 14:22:15,500 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 14:22:15,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215923112] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:22:15,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 14:22:15,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13] total 24 [2023-08-26 14:22:15,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133004131] [2023-08-26 14:22:15,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:22:15,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 14:22:15,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:22:15,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 14:22:15,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=587, Unknown=0, NotChecked=0, Total=650 [2023-08-26 14:22:15,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 349 [2023-08-26 14:22:15,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 167 transitions, 1332 flow. Second operand has 13 states, 13 states have (on average 113.0) internal successors, (1469), 13 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:15,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:22:15,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 349 [2023-08-26 14:22:15,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:22:16,955 INFO L124 PetriNetUnfolderBase]: 2508/4683 cut-off events. [2023-08-26 14:22:16,955 INFO L125 PetriNetUnfolderBase]: For 5640/5640 co-relation queries the response was YES. [2023-08-26 14:22:16,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14960 conditions, 4683 events. 2508/4683 cut-off events. For 5640/5640 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 25665 event pairs, 242 based on Foata normal form. 18/4633 useless extension candidates. Maximal degree in co-relation 14916. Up to 1475 conditions per place. [2023-08-26 14:22:16,981 INFO L140 encePairwiseOnDemand]: 335/349 looper letters, 151 selfloop transitions, 137 changer transitions 3/291 dead transitions. [2023-08-26 14:22:16,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 291 transitions, 2355 flow [2023-08-26 14:22:16,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-26 14:22:16,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-26 14:22:16,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 3053 transitions. [2023-08-26 14:22:16,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33645580780251266 [2023-08-26 14:22:16,986 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 3053 transitions. [2023-08-26 14:22:16,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 3053 transitions. [2023-08-26 14:22:16,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:22:16,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 3053 transitions. [2023-08-26 14:22:16,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 117.42307692307692) internal successors, (3053), 26 states have internal predecessors, (3053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:16,998 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 349.0) internal successors, (9423), 27 states have internal predecessors, (9423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:17,000 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 349.0) internal successors, (9423), 27 states have internal predecessors, (9423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:17,000 INFO L175 Difference]: Start difference. First operand has 170 places, 167 transitions, 1332 flow. Second operand 26 states and 3053 transitions. [2023-08-26 14:22:17,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 291 transitions, 2355 flow [2023-08-26 14:22:17,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 291 transitions, 2345 flow, removed 5 selfloop flow, removed 0 redundant places. [2023-08-26 14:22:17,040 INFO L231 Difference]: Finished difference. Result has 197 places, 187 transitions, 1829 flow [2023-08-26 14:22:17,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=1326, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1829, PETRI_PLACES=197, PETRI_TRANSITIONS=187} [2023-08-26 14:22:17,041 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 151 predicate places. [2023-08-26 14:22:17,041 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 187 transitions, 1829 flow [2023-08-26 14:22:17,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 113.0) internal successors, (1469), 13 states have internal predecessors, (1469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:17,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:22:17,042 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2023-08-26 14:22:17,047 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 14:22:17,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 14:22:17,248 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 14:22:17,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:22:17,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1761919503, now seen corresponding path program 2 times [2023-08-26 14:22:17,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:22:17,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442162336] [2023-08-26 14:22:17,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:22:17,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:22:17,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:22:18,127 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:22:18,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:22:18,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442162336] [2023-08-26 14:22:18,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442162336] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 14:22:18,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418950969] [2023-08-26 14:22:18,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 14:22:18,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 14:22:18,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 14:22:18,130 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 14:22:18,132 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 14:22:18,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 14:22:18,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 14:22:18,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-26 14:22:18,262 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 14:22:18,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 14:22:18,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 14:22:18,290 INFO L322 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-08-26 14:22:18,290 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 23 [2023-08-26 14:22:18,320 INFO L322 Elim1Store]: treesize reduction 21, result has 48.8 percent of original size [2023-08-26 14:22:18,321 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 45 [2023-08-26 14:22:18,763 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:22:18,763 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 14:22:19,132 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:22:19,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418950969] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 14:22:19,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 14:22:19,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10, 9] total 38 [2023-08-26 14:22:19,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205562405] [2023-08-26 14:22:19,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 14:22:19,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-08-26 14:22:19,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:22:19,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-08-26 14:22:19,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1420, Unknown=0, NotChecked=0, Total=1560 [2023-08-26 14:22:19,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 349 [2023-08-26 14:22:19,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 187 transitions, 1829 flow. Second operand has 40 states, 40 states have (on average 118.025) internal successors, (4721), 40 states have internal predecessors, (4721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:19,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:22:19,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 349 [2023-08-26 14:22:19,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:22:22,069 INFO L124 PetriNetUnfolderBase]: 3418/6365 cut-off events. [2023-08-26 14:22:22,069 INFO L125 PetriNetUnfolderBase]: For 10291/10291 co-relation queries the response was YES. [2023-08-26 14:22:22,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23218 conditions, 6365 events. 3418/6365 cut-off events. For 10291/10291 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 34661 event pairs, 1032 based on Foata normal form. 84/6349 useless extension candidates. Maximal degree in co-relation 23171. Up to 3742 conditions per place. [2023-08-26 14:22:22,109 INFO L140 encePairwiseOnDemand]: 340/349 looper letters, 388 selfloop transitions, 64 changer transitions 6/458 dead transitions. [2023-08-26 14:22:22,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 458 transitions, 4253 flow [2023-08-26 14:22:22,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-08-26 14:22:22,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2023-08-26 14:22:22,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 3549 transitions. [2023-08-26 14:22:22,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3631805157593123 [2023-08-26 14:22:22,114 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 3549 transitions. [2023-08-26 14:22:22,114 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 3549 transitions. [2023-08-26 14:22:22,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:22:22,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 3549 transitions. [2023-08-26 14:22:22,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 126.75) internal successors, (3549), 28 states have internal predecessors, (3549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:22,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 349.0) internal successors, (10121), 29 states have internal predecessors, (10121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:22,127 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 349.0) internal successors, (10121), 29 states have internal predecessors, (10121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:22,128 INFO L175 Difference]: Start difference. First operand has 197 places, 187 transitions, 1829 flow. Second operand 28 states and 3549 transitions. [2023-08-26 14:22:22,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 458 transitions, 4253 flow [2023-08-26 14:22:22,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 458 transitions, 4079 flow, removed 22 selfloop flow, removed 11 redundant places. [2023-08-26 14:22:22,215 INFO L231 Difference]: Finished difference. Result has 223 places, 231 transitions, 2483 flow [2023-08-26 14:22:22,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=1709, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=2483, PETRI_PLACES=223, PETRI_TRANSITIONS=231} [2023-08-26 14:22:22,215 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 177 predicate places. [2023-08-26 14:22:22,216 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 231 transitions, 2483 flow [2023-08-26 14:22:22,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 118.025) internal successors, (4721), 40 states have internal predecessors, (4721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:22,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:22:22,217 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:22:22,228 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 14:22:22,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 14:22:22,423 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t2Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 14:22:22,423 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:22:22,423 INFO L85 PathProgramCache]: Analyzing trace with hash 467836902, now seen corresponding path program 3 times [2023-08-26 14:22:22,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:22:22,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716754154] [2023-08-26 14:22:22,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:22:22,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:22:22,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:22:23,010 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 14:22:23,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:22:23,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716754154] [2023-08-26 14:22:23,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716754154] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 14:22:23,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 14:22:23,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2023-08-26 14:22:23,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767897498] [2023-08-26 14:22:23,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 14:22:23,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-26 14:22:23,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:22:23,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-26 14:22:23,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2023-08-26 14:22:23,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 349 [2023-08-26 14:22:23,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 231 transitions, 2483 flow. Second operand has 15 states, 15 states have (on average 106.86666666666666) internal successors, (1603), 15 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:23,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:22:23,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 349 [2023-08-26 14:22:23,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:22:25,705 INFO L124 PetriNetUnfolderBase]: 5490/10186 cut-off events. [2023-08-26 14:22:25,706 INFO L125 PetriNetUnfolderBase]: For 23138/23138 co-relation queries the response was YES. [2023-08-26 14:22:25,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38052 conditions, 10186 events. 5490/10186 cut-off events. For 23138/23138 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 62669 event pairs, 948 based on Foata normal form. 0/10036 useless extension candidates. Maximal degree in co-relation 37999. Up to 2305 conditions per place. [2023-08-26 14:22:25,763 INFO L140 encePairwiseOnDemand]: 330/349 looper letters, 190 selfloop transitions, 330 changer transitions 4/524 dead transitions. [2023-08-26 14:22:25,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 524 transitions, 5851 flow [2023-08-26 14:22:25,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-08-26 14:22:25,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2023-08-26 14:22:25,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3663 transitions. [2023-08-26 14:22:25,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31805157593123207 [2023-08-26 14:22:25,769 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3663 transitions. [2023-08-26 14:22:25,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3663 transitions. [2023-08-26 14:22:25,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:22:25,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3663 transitions. [2023-08-26 14:22:25,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 111.0) internal successors, (3663), 33 states have internal predecessors, (3663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:25,784 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 349.0) internal successors, (11866), 34 states have internal predecessors, (11866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:25,785 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 349.0) internal successors, (11866), 34 states have internal predecessors, (11866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:25,785 INFO L175 Difference]: Start difference. First operand has 223 places, 231 transitions, 2483 flow. Second operand 33 states and 3663 transitions. [2023-08-26 14:22:25,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 524 transitions, 5851 flow [2023-08-26 14:22:26,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 524 transitions, 5673 flow, removed 61 selfloop flow, removed 10 redundant places. [2023-08-26 14:22:26,084 INFO L231 Difference]: Finished difference. Result has 252 places, 395 transitions, 5090 flow [2023-08-26 14:22:26,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=2386, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=5090, PETRI_PLACES=252, PETRI_TRANSITIONS=395} [2023-08-26 14:22:26,085 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 206 predicate places. [2023-08-26 14:22:26,085 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 395 transitions, 5090 flow [2023-08-26 14:22:26,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 106.86666666666666) internal successors, (1603), 15 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:26,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:22:26,086 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:22:26,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-26 14:22:26,086 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t2Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 14:22:26,086 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:22:26,086 INFO L85 PathProgramCache]: Analyzing trace with hash -2038868506, now seen corresponding path program 4 times [2023-08-26 14:22:26,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:22:26,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76057287] [2023-08-26 14:22:26,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:22:26,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:22:26,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:22:26,960 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:22:26,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:22:26,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76057287] [2023-08-26 14:22:26,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76057287] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 14:22:26,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464433178] [2023-08-26 14:22:26,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 14:22:26,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 14:22:26,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 14:22:26,961 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 14:22:26,963 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 14:22:27,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 14:22:27,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 14:22:27,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 64 conjunts are in the unsatisfiable core [2023-08-26 14:22:27,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 14:22:27,125 INFO L322 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-26 14:22:27,125 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-08-26 14:22:27,454 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-26 14:22:27,609 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-08-26 14:22:27,882 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 32 [2023-08-26 14:22:27,954 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:22:27,954 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 14:22:28,321 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_642 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_642) |c_~#arr~0.base|) (+ (* |c_t1Thread1of1ForFork1_inc_top_#t~post31#1| 4) |c_~#arr~0.offset|)) 4294967296)))) is different from false [2023-08-26 14:22:28,326 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_642 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_642) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4))) 4294967296)))) is different from false [2023-08-26 14:22:28,333 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 14:22:28,334 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2023-08-26 14:22:28,341 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 14:22:28,342 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2023-08-26 14:22:28,346 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2023-08-26 14:22:28,576 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2023-08-26 14:22:28,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464433178] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 14:22:28,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 14:22:28,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 14] total 46 [2023-08-26 14:22:28,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203072393] [2023-08-26 14:22:28,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 14:22:28,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-08-26 14:22:28,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:22:28,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-08-26 14:22:28,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1892, Unknown=3, NotChecked=178, Total=2256 [2023-08-26 14:22:28,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 349 [2023-08-26 14:22:28,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 395 transitions, 5090 flow. Second operand has 48 states, 48 states have (on average 91.75) internal successors, (4404), 48 states have internal predecessors, (4404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:28,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:22:28,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 349 [2023-08-26 14:22:28,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:22:41,187 INFO L124 PetriNetUnfolderBase]: 7034/13062 cut-off events. [2023-08-26 14:22:41,187 INFO L125 PetriNetUnfolderBase]: For 34824/34824 co-relation queries the response was YES. [2023-08-26 14:22:41,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53782 conditions, 13062 events. 7034/13062 cut-off events. For 34824/34824 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 83769 event pairs, 1166 based on Foata normal form. 40/12934 useless extension candidates. Maximal degree in co-relation 53721. Up to 2978 conditions per place. [2023-08-26 14:22:41,265 INFO L140 encePairwiseOnDemand]: 328/349 looper letters, 327 selfloop transitions, 485 changer transitions 15/827 dead transitions. [2023-08-26 14:22:41,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 827 transitions, 9401 flow [2023-08-26 14:22:41,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-08-26 14:22:41,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2023-08-26 14:22:41,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 6808 transitions. [2023-08-26 14:22:41,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2747487792082005 [2023-08-26 14:22:41,272 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 6808 transitions. [2023-08-26 14:22:41,272 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 6808 transitions. [2023-08-26 14:22:41,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:22:41,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 6808 transitions. [2023-08-26 14:22:41,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 95.88732394366197) internal successors, (6808), 71 states have internal predecessors, (6808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:41,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 349.0) internal successors, (25128), 72 states have internal predecessors, (25128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:41,303 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 349.0) internal successors, (25128), 72 states have internal predecessors, (25128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:41,303 INFO L175 Difference]: Start difference. First operand has 252 places, 395 transitions, 5090 flow. Second operand 71 states and 6808 transitions. [2023-08-26 14:22:41,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 827 transitions, 9401 flow [2023-08-26 14:22:41,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 827 transitions, 9184 flow, removed 84 selfloop flow, removed 7 redundant places. [2023-08-26 14:22:41,624 INFO L231 Difference]: Finished difference. Result has 322 places, 541 transitions, 7745 flow [2023-08-26 14:22:41,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=4986, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=345, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=7745, PETRI_PLACES=322, PETRI_TRANSITIONS=541} [2023-08-26 14:22:41,624 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 276 predicate places. [2023-08-26 14:22:41,624 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 541 transitions, 7745 flow [2023-08-26 14:22:41,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 91.75) internal successors, (4404), 48 states have internal predecessors, (4404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:41,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:22:41,625 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:22:41,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-26 14:22:41,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 14:22:41,831 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 14:22:41,832 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:22:41,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1933740609, now seen corresponding path program 2 times [2023-08-26 14:22:41,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:22:41,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141586513] [2023-08-26 14:22:41,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:22:41,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:22:41,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:22:42,414 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:22:42,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:22:42,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141586513] [2023-08-26 14:22:42,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141586513] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 14:22:42,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115900704] [2023-08-26 14:22:42,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 14:22:42,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 14:22:42,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 14:22:42,416 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 14:22:42,418 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 14:22:42,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 14:22:42,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 14:22:42,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-26 14:22:42,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 14:22:42,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 14:22:42,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 14:22:42,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 14:22:42,575 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2023-08-26 14:22:43,128 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:22:43,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 14:22:43,528 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:22:43,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115900704] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 14:22:43,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 14:22:43,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 9] total 35 [2023-08-26 14:22:43,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297284808] [2023-08-26 14:22:43,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 14:22:43,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-08-26 14:22:43,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:22:43,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-08-26 14:22:43,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2023-08-26 14:22:43,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 349 [2023-08-26 14:22:43,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 541 transitions, 7745 flow. Second operand has 37 states, 37 states have (on average 110.51351351351352) internal successors, (4089), 37 states have internal predecessors, (4089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:43,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:22:43,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 349 [2023-08-26 14:22:43,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:22:48,093 INFO L124 PetriNetUnfolderBase]: 8198/15244 cut-off events. [2023-08-26 14:22:48,093 INFO L125 PetriNetUnfolderBase]: For 50971/50971 co-relation queries the response was YES. [2023-08-26 14:22:48,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71256 conditions, 15244 events. 8198/15244 cut-off events. For 50971/50971 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 101644 event pairs, 2553 based on Foata normal form. 42/15048 useless extension candidates. Maximal degree in co-relation 71188. Up to 8849 conditions per place. [2023-08-26 14:22:48,199 INFO L140 encePairwiseOnDemand]: 337/349 looper letters, 672 selfloop transitions, 171 changer transitions 27/870 dead transitions. [2023-08-26 14:22:48,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 870 transitions, 12423 flow [2023-08-26 14:22:48,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-08-26 14:22:48,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-08-26 14:22:48,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3613 transitions. [2023-08-26 14:22:48,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33394953322857934 [2023-08-26 14:22:48,203 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3613 transitions. [2023-08-26 14:22:48,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3613 transitions. [2023-08-26 14:22:48,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:22:48,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3613 transitions. [2023-08-26 14:22:48,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 116.54838709677419) internal successors, (3613), 31 states have internal predecessors, (3613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:48,215 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 349.0) internal successors, (11168), 32 states have internal predecessors, (11168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:48,216 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 349.0) internal successors, (11168), 32 states have internal predecessors, (11168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:48,216 INFO L175 Difference]: Start difference. First operand has 322 places, 541 transitions, 7745 flow. Second operand 31 states and 3613 transitions. [2023-08-26 14:22:48,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 870 transitions, 12423 flow [2023-08-26 14:22:48,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 870 transitions, 11235 flow, removed 197 selfloop flow, removed 29 redundant places. [2023-08-26 14:22:48,577 INFO L231 Difference]: Finished difference. Result has 334 places, 606 transitions, 8356 flow [2023-08-26 14:22:48,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=6751, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=8356, PETRI_PLACES=334, PETRI_TRANSITIONS=606} [2023-08-26 14:22:48,578 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 288 predicate places. [2023-08-26 14:22:48,578 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 606 transitions, 8356 flow [2023-08-26 14:22:48,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 110.51351351351352) internal successors, (4089), 37 states have internal predecessors, (4089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:48,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:22:48,579 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:22:48,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-26 14:22:48,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-08-26 14:22:48,785 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 14:22:48,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:22:48,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1772673812, now seen corresponding path program 1 times [2023-08-26 14:22:48,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:22:48,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742347613] [2023-08-26 14:22:48,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:22:48,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:22:48,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:22:49,111 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-26 14:22:49,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:22:49,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742347613] [2023-08-26 14:22:49,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742347613] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 14:22:49,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642498553] [2023-08-26 14:22:49,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:22:49,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 14:22:49,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 14:22:49,117 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 14:22:49,119 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 14:22:49,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:22:49,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 35 conjunts are in the unsatisfiable core [2023-08-26 14:22:49,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 14:22:49,812 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:22:49,812 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 14:22:50,266 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 14:22:50,267 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 39 [2023-08-26 14:22:50,404 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:22:50,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642498553] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 14:22:50,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 14:22:50,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 15] total 41 [2023-08-26 14:22:50,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624977089] [2023-08-26 14:22:50,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 14:22:50,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-08-26 14:22:50,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:22:50,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-08-26 14:22:50,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1635, Unknown=0, NotChecked=0, Total=1806 [2023-08-26 14:22:50,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 349 [2023-08-26 14:22:50,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 606 transitions, 8356 flow. Second operand has 43 states, 43 states have (on average 113.37209302325581) internal successors, (4875), 43 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:50,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:22:50,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 349 [2023-08-26 14:22:50,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:22:56,023 INFO L124 PetriNetUnfolderBase]: 8216/15280 cut-off events. [2023-08-26 14:22:56,023 INFO L125 PetriNetUnfolderBase]: For 46919/46919 co-relation queries the response was YES. [2023-08-26 14:22:56,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69629 conditions, 15280 events. 8216/15280 cut-off events. For 46919/46919 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 101879 event pairs, 1020 based on Foata normal form. 6/15052 useless extension candidates. Maximal degree in co-relation 69556. Up to 6129 conditions per place. [2023-08-26 14:22:56,143 INFO L140 encePairwiseOnDemand]: 335/349 looper letters, 201 selfloop transitions, 530 changer transitions 3/734 dead transitions. [2023-08-26 14:22:56,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 734 transitions, 10287 flow [2023-08-26 14:22:56,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-08-26 14:22:56,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2023-08-26 14:22:56,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3981 transitions. [2023-08-26 14:22:56,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33549637620091016 [2023-08-26 14:22:56,147 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3981 transitions. [2023-08-26 14:22:56,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3981 transitions. [2023-08-26 14:22:56,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:22:56,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3981 transitions. [2023-08-26 14:22:56,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 117.08823529411765) internal successors, (3981), 34 states have internal predecessors, (3981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:56,159 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 349.0) internal successors, (12215), 35 states have internal predecessors, (12215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:56,160 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 349.0) internal successors, (12215), 35 states have internal predecessors, (12215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:56,161 INFO L175 Difference]: Start difference. First operand has 334 places, 606 transitions, 8356 flow. Second operand 34 states and 3981 transitions. [2023-08-26 14:22:56,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 734 transitions, 10287 flow [2023-08-26 14:22:56,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 734 transitions, 10175 flow, removed 31 selfloop flow, removed 10 redundant places. [2023-08-26 14:22:56,519 INFO L231 Difference]: Finished difference. Result has 356 places, 610 transitions, 9336 flow [2023-08-26 14:22:56,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=8248, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=525, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=9336, PETRI_PLACES=356, PETRI_TRANSITIONS=610} [2023-08-26 14:22:56,519 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 310 predicate places. [2023-08-26 14:22:56,520 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 610 transitions, 9336 flow [2023-08-26 14:22:56,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 113.37209302325581) internal successors, (4875), 43 states have internal predecessors, (4875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:22:56,520 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:22:56,521 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:22:56,531 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 14:22:56,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-26 14:22:56,727 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting t2Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 14:22:56,727 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:22:56,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1562433482, now seen corresponding path program 1 times [2023-08-26 14:22:56,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:22:56,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422406364] [2023-08-26 14:22:56,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:22:56,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:22:56,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:22:57,838 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:22:57,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:22:57,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422406364] [2023-08-26 14:22:57,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422406364] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 14:22:57,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426348637] [2023-08-26 14:22:57,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:22:57,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 14:22:57,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 14:22:57,840 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 14:22:57,841 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 14:22:57,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:22:57,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 76 conjunts are in the unsatisfiable core [2023-08-26 14:22:57,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 14:22:58,183 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-26 14:22:58,442 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-08-26 14:22:58,925 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-26 14:22:58,926 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 32 [2023-08-26 14:22:58,988 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:22:58,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 14:23:02,099 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 48 [2023-08-26 14:23:02,380 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:23:02,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426348637] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 14:23:02,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 14:23:02,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 20] total 60 [2023-08-26 14:23:02,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225510267] [2023-08-26 14:23:02,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 14:23:02,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-08-26 14:23:02,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:23:02,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-08-26 14:23:02,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=3430, Unknown=1, NotChecked=0, Total=3782 [2023-08-26 14:23:02,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 349 [2023-08-26 14:23:02,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 610 transitions, 9336 flow. Second operand has 62 states, 62 states have (on average 106.74193548387096) internal successors, (6618), 62 states have internal predecessors, (6618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:23:02,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:23:02,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 349 [2023-08-26 14:23:02,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:23:09,748 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 14:23:23,346 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 14:23:29,809 WARN L539 Checker$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 14:23:57,607 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 14:24:03,259 WARN L539 Checker$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 14:24:03,977 INFO L124 PetriNetUnfolderBase]: 12948/24191 cut-off events. [2023-08-26 14:24:03,977 INFO L125 PetriNetUnfolderBase]: For 79765/79765 co-relation queries the response was YES. [2023-08-26 14:24:04,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115216 conditions, 24191 events. 12948/24191 cut-off events. For 79765/79765 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 173643 event pairs, 2886 based on Foata normal form. 102/23971 useless extension candidates. Maximal degree in co-relation 115143. Up to 8905 conditions per place. [2023-08-26 14:24:04,167 INFO L140 encePairwiseOnDemand]: 329/349 looper letters, 937 selfloop transitions, 650 changer transitions 223/1810 dead transitions. [2023-08-26 14:24:04,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 1810 transitions, 23856 flow [2023-08-26 14:24:04,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2023-08-26 14:24:04,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2023-08-26 14:24:04,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 17468 transitions. [2023-08-26 14:24:04,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.31678212614703855 [2023-08-26 14:24:04,185 INFO L72 ComplementDD]: Start complementDD. Operand 158 states and 17468 transitions. [2023-08-26 14:24:04,185 INFO L73 IsDeterministic]: Start isDeterministic. Operand 158 states and 17468 transitions. [2023-08-26 14:24:04,189 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:24:04,189 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 158 states and 17468 transitions. [2023-08-26 14:24:04,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 159 states, 158 states have (on average 110.55696202531645) internal successors, (17468), 158 states have internal predecessors, (17468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:24:04,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 159 states, 159 states have (on average 349.0) internal successors, (55491), 159 states have internal predecessors, (55491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:24:04,259 INFO L81 ComplementDD]: Finished complementDD. Result has 159 states, 159 states have (on average 349.0) internal successors, (55491), 159 states have internal predecessors, (55491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:24:04,260 INFO L175 Difference]: Start difference. First operand has 356 places, 610 transitions, 9336 flow. Second operand 158 states and 17468 transitions. [2023-08-26 14:24:04,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 1810 transitions, 23856 flow [2023-08-26 14:24:04,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 1810 transitions, 21178 flow, removed 31 selfloop flow, removed 26 redundant places. [2023-08-26 14:24:04,825 INFO L231 Difference]: Finished difference. Result has 535 places, 1133 transitions, 16926 flow [2023-08-26 14:24:04,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=7967, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=610, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=238, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=158, PETRI_FLOW=16926, PETRI_PLACES=535, PETRI_TRANSITIONS=1133} [2023-08-26 14:24:04,826 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 489 predicate places. [2023-08-26 14:24:04,826 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 1133 transitions, 16926 flow [2023-08-26 14:24:04,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 106.74193548387096) internal successors, (6618), 62 states have internal predecessors, (6618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:24:04,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:24:04,827 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:24:04,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-26 14:24:05,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-26 14:24:05,028 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting t2Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 14:24:05,028 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:24:05,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1429512368, now seen corresponding path program 2 times [2023-08-26 14:24:05,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:24:05,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773567439] [2023-08-26 14:24:05,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:24:05,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:24:05,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:24:06,332 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:24:06,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:24:06,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773567439] [2023-08-26 14:24:06,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773567439] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 14:24:06,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422028081] [2023-08-26 14:24:06,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 14:24:06,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 14:24:06,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 14:24:06,334 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 14:24:06,335 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 14:24:06,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-26 14:24:06,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 14:24:06,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 82 conjunts are in the unsatisfiable core [2023-08-26 14:24:06,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 14:24:06,488 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-26 14:24:06,488 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-08-26 14:24:06,671 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-08-26 14:24:06,716 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2023-08-26 14:24:06,990 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2023-08-26 14:24:13,763 INFO L322 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2023-08-26 14:24:13,763 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 35 [2023-08-26 14:24:13,832 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:24:13,833 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 14:24:17,370 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 14:24:17,371 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2023-08-26 14:24:17,381 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 14:24:17,382 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 54 [2023-08-26 14:24:17,387 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 22 [2023-08-26 14:24:17,798 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:24:17,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422028081] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 14:24:17,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 14:24:17,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 21] total 64 [2023-08-26 14:24:17,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643713686] [2023-08-26 14:24:17,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 14:24:17,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-08-26 14:24:17,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:24:17,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-08-26 14:24:17,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=334, Invalid=3946, Unknown=10, NotChecked=0, Total=4290 [2023-08-26 14:24:17,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 349 [2023-08-26 14:24:17,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 1133 transitions, 16926 flow. Second operand has 66 states, 66 states have (on average 91.63636363636364) internal successors, (6048), 66 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:24:17,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:24:17,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 349 [2023-08-26 14:24:17,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:24:46,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 14:24:50,580 WARN L539 Checker$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 14:24:54,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 14:25:09,254 WARN L539 Checker$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 14:25:11,776 INFO L124 PetriNetUnfolderBase]: 15298/28586 cut-off events. [2023-08-26 14:25:11,776 INFO L125 PetriNetUnfolderBase]: For 107270/107270 co-relation queries the response was YES. [2023-08-26 14:25:12,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136405 conditions, 28586 events. 15298/28586 cut-off events. For 107270/107270 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 211013 event pairs, 4246 based on Foata normal form. 28/28212 useless extension candidates. Maximal degree in co-relation 136286. Up to 14324 conditions per place. [2023-08-26 14:25:12,148 INFO L140 encePairwiseOnDemand]: 328/349 looper letters, 1064 selfloop transitions, 631 changer transitions 151/1846 dead transitions. [2023-08-26 14:25:12,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 617 places, 1846 transitions, 26713 flow [2023-08-26 14:25:12,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-08-26 14:25:12,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2023-08-26 14:25:12,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 8000 transitions. [2023-08-26 14:25:12,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2761763385921911 [2023-08-26 14:25:12,156 INFO L72 ComplementDD]: Start complementDD. Operand 83 states and 8000 transitions. [2023-08-26 14:25:12,156 INFO L73 IsDeterministic]: Start isDeterministic. Operand 83 states and 8000 transitions. [2023-08-26 14:25:12,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:25:12,157 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 83 states and 8000 transitions. [2023-08-26 14:25:12,165 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 84 states, 83 states have (on average 96.3855421686747) internal successors, (8000), 83 states have internal predecessors, (8000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:25:12,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 84 states, 84 states have (on average 349.0) internal successors, (29316), 84 states have internal predecessors, (29316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:25:12,282 INFO L81 ComplementDD]: Finished complementDD. Result has 84 states, 84 states have (on average 349.0) internal successors, (29316), 84 states have internal predecessors, (29316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:25:12,283 INFO L175 Difference]: Start difference. First operand has 535 places, 1133 transitions, 16926 flow. Second operand 83 states and 8000 transitions. [2023-08-26 14:25:12,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 617 places, 1846 transitions, 26713 flow [2023-08-26 14:25:13,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 597 places, 1846 transitions, 26038 flow, removed 287 selfloop flow, removed 20 redundant places. [2023-08-26 14:25:13,593 INFO L231 Difference]: Finished difference. Result has 650 places, 1423 transitions, 22686 flow [2023-08-26 14:25:13,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=16435, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=379, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=83, PETRI_FLOW=22686, PETRI_PLACES=650, PETRI_TRANSITIONS=1423} [2023-08-26 14:25:13,595 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 604 predicate places. [2023-08-26 14:25:13,595 INFO L495 AbstractCegarLoop]: Abstraction has has 650 places, 1423 transitions, 22686 flow [2023-08-26 14:25:13,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 91.63636363636364) internal successors, (6048), 66 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:25:13,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:25:13,596 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:25:13,600 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 14:25:13,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-26 14:25:13,796 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting t2Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 14:25:13,796 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:25:13,796 INFO L85 PathProgramCache]: Analyzing trace with hash -19589870, now seen corresponding path program 3 times [2023-08-26 14:25:13,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:25:13,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967478839] [2023-08-26 14:25:13,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:25:13,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:25:13,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:25:15,500 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:25:15,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:25:15,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967478839] [2023-08-26 14:25:15,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967478839] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 14:25:15,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515724494] [2023-08-26 14:25:15,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-26 14:25:15,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 14:25:15,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 14:25:15,501 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 14:25:15,503 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 14:25:15,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-26 14:25:15,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 14:25:15,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 92 conjunts are in the unsatisfiable core [2023-08-26 14:25:15,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 14:25:15,675 INFO L322 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-26 14:25:15,675 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-08-26 14:25:15,916 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-26 14:25:16,202 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-08-26 14:25:16,343 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2023-08-26 14:25:16,946 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-26 14:25:16,947 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 32 [2023-08-26 14:25:17,008 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:25:17,008 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 14:25:20,293 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_983 Int) (v_ArrVal_981 (Array Int Int)) (v_~top~0_96 Int)) (or (not (= 4294967294 (mod (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_981) |c_~#arr~0.base|) (+ (* |c_t1Thread1of1ForFork1_inc_top_#t~post31#1| 4) |c_~#arr~0.offset| 4) v_ArrVal_983) (+ |c_~#arr~0.offset| (- 4) (* v_~top~0_96 4))) 4294967296))) (<= v_~top~0_96 0) (< (+ |c_t1Thread1of1ForFork1_inc_top_#t~post31#1| 1) v_~top~0_96))) is different from false [2023-08-26 14:25:20,424 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 14:25:20,424 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 39 [2023-08-26 14:25:20,435 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 14:25:20,435 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 71 [2023-08-26 14:25:20,441 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 57 [2023-08-26 14:25:20,451 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 4 [2023-08-26 14:25:20,465 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 14:25:20,465 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 68 [2023-08-26 14:25:20,876 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-26 14:25:20,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515724494] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 14:25:20,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 14:25:20,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 22] total 69 [2023-08-26 14:25:20,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549012764] [2023-08-26 14:25:20,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 14:25:20,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-08-26 14:25:20,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:25:20,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-08-26 14:25:20,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=4374, Unknown=37, NotChecked=136, Total=4970 [2023-08-26 14:25:20,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 349 [2023-08-26 14:25:20,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 650 places, 1423 transitions, 22686 flow. Second operand has 71 states, 71 states have (on average 91.52112676056338) internal successors, (6498), 71 states have internal predecessors, (6498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:25:20,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:25:20,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 349 [2023-08-26 14:25:20,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:25:30,080 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 14:25:38,368 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (* c_~top~0 4))) (and (forall ((v_ArrVal_983 Int) (v_ArrVal_981 (Array Int Int)) (v_~top~0_96 Int)) (or (not (= 4294967294 (mod (select (select (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_981))) (store .cse0 |c_t1Thread1of1ForFork1_push_#in~stack#1.base| (store (select .cse0 |c_t1Thread1of1ForFork1_push_#in~stack#1.base|) (+ |c_t1Thread1of1ForFork1_push_#in~stack#1.offset| .cse1) v_ArrVal_983))) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (- 4) (* v_~top~0_96 4))) 4294967296))) (< c_~top~0 v_~top~0_96) (<= v_~top~0_96 0))) (forall ((v_~top~0_96 Int)) (or (not (= (mod (select (select |c_#memory_int| |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (- 4) (* v_~top~0_96 4))) 4294967296) 4294967294)) (< c_~top~0 v_~top~0_96) (<= v_~top~0_96 0))) (forall ((v_ArrVal_983 Int) (v_ArrVal_981 (Array Int Int)) (v_~top~0_96 Int)) (or (not (= 4294967294 (mod (select (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_981) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| .cse1) v_ArrVal_983) (+ |c_~#arr~0.offset| (- 4) (* v_~top~0_96 4))) 4294967296))) (< c_~top~0 v_~top~0_96) (<= v_~top~0_96 0))))) is different from false [2023-08-26 14:25:41,045 WARN L539 Checker$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 14:25:43,181 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 14:25:54,915 WARN L539 Checker$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 14:25:56,959 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 14:26:13,996 WARN L539 Checker$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 14:26:16,051 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 14:26:25,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 14:26:34,794 INFO L124 PetriNetUnfolderBase]: 20022/37610 cut-off events. [2023-08-26 14:26:34,794 INFO L125 PetriNetUnfolderBase]: For 172409/172409 co-relation queries the response was YES. [2023-08-26 14:26:35,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 187448 conditions, 37610 events. 20022/37610 cut-off events. For 172409/172409 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 291002 event pairs, 6680 based on Foata normal form. 54/37113 useless extension candidates. Maximal degree in co-relation 187280. Up to 20603 conditions per place. [2023-08-26 14:26:35,581 INFO L140 encePairwiseOnDemand]: 326/349 looper letters, 1586 selfloop transitions, 767 changer transitions 154/2507 dead transitions. [2023-08-26 14:26:35,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 748 places, 2507 transitions, 40170 flow [2023-08-26 14:26:35,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2023-08-26 14:26:35,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2023-08-26 14:26:35,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 9540 transitions. [2023-08-26 14:26:35,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27611357124251107 [2023-08-26 14:26:35,589 INFO L72 ComplementDD]: Start complementDD. Operand 99 states and 9540 transitions. [2023-08-26 14:26:35,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 99 states and 9540 transitions. [2023-08-26 14:26:35,591 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:26:35,591 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 99 states and 9540 transitions. [2023-08-26 14:26:35,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 100 states, 99 states have (on average 96.36363636363636) internal successors, (9540), 99 states have internal predecessors, (9540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:26:35,614 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 100 states, 100 states have (on average 349.0) internal successors, (34900), 100 states have internal predecessors, (34900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:26:35,616 INFO L81 ComplementDD]: Finished complementDD. Result has 100 states, 100 states have (on average 349.0) internal successors, (34900), 100 states have internal predecessors, (34900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:26:35,616 INFO L175 Difference]: Start difference. First operand has 650 places, 1423 transitions, 22686 flow. Second operand 99 states and 9540 transitions. [2023-08-26 14:26:35,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 748 places, 2507 transitions, 40170 flow [2023-08-26 14:26:38,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 746 places, 2507 transitions, 39953 flow, removed 99 selfloop flow, removed 2 redundant places. [2023-08-26 14:26:38,382 INFO L231 Difference]: Finished difference. Result has 792 places, 1866 transitions, 32497 flow [2023-08-26 14:26:38,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=349, PETRI_DIFFERENCE_MINUEND_FLOW=22456, PETRI_DIFFERENCE_MINUEND_PLACES=648, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=408, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=835, PETRI_DIFFERENCE_SUBTRAHEND_STATES=99, PETRI_FLOW=32497, PETRI_PLACES=792, PETRI_TRANSITIONS=1866} [2023-08-26 14:26:38,384 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 746 predicate places. [2023-08-26 14:26:38,384 INFO L495 AbstractCegarLoop]: Abstraction has has 792 places, 1866 transitions, 32497 flow [2023-08-26 14:26:38,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 91.52112676056338) internal successors, (6498), 71 states have internal predecessors, (6498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:26:38,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 14:26:38,385 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:26:38,393 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 14:26:38,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-08-26 14:26:38,591 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting t2Err2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2023-08-26 14:26:38,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 14:26:38,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1233541596, now seen corresponding path program 4 times [2023-08-26 14:26:38,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 14:26:38,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833791372] [2023-08-26 14:26:38,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 14:26:38,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 14:26:38,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 14:26:39,870 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:26:39,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 14:26:39,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833791372] [2023-08-26 14:26:39,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833791372] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 14:26:39,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656445539] [2023-08-26 14:26:39,871 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-26 14:26:39,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 14:26:39,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 14:26:39,872 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 14:26:39,873 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 14:26:40,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-26 14:26:40,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 14:26:40,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 80 conjunts are in the unsatisfiable core [2023-08-26 14:26:40,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 14:26:40,022 INFO L322 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-08-26 14:26:40,023 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 34 [2023-08-26 14:26:40,216 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-08-26 14:26:40,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 14:26:40,522 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 25 [2023-08-26 14:26:40,633 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2023-08-26 14:26:41,102 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 32 [2023-08-26 14:26:41,167 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:26:41,167 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 14:26:44,106 INFO L322 Elim1Store]: treesize reduction 27, result has 61.4 percent of original size [2023-08-26 14:26:44,106 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 53 treesize of output 60 [2023-08-26 14:26:44,121 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-26 14:26:44,121 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 70 [2023-08-26 14:26:44,128 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2023-08-26 14:26:46,466 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 14:26:46,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656445539] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 14:26:46,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 14:26:46,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22, 22] total 69 [2023-08-26 14:26:46,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161274466] [2023-08-26 14:26:46,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 14:26:46,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-08-26 14:26:46,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 14:26:46,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-08-26 14:26:46,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=4587, Unknown=41, NotChecked=0, Total=4970 [2023-08-26 14:26:46,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 349 [2023-08-26 14:26:46,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 792 places, 1866 transitions, 32497 flow. Second operand has 71 states, 71 states have (on average 91.52112676056338) internal successors, (6498), 71 states have internal predecessors, (6498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:26:46,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 14:26:46,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 349 [2023-08-26 14:26:46,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 14:28:20,702 WARN L234 SmtUtils]: Spent 8.51s on a formula simplification. DAG size of input: 83 DAG size of output: 77 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 14:28:48,749 WARN L234 SmtUtils]: Spent 6.39s on a formula simplification. DAG size of input: 83 DAG size of output: 74 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 14:28:50,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 14:28:57,641 WARN L234 SmtUtils]: Spent 6.30s on a formula simplification. DAG size of input: 91 DAG size of output: 85 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 14:29:12,427 WARN L234 SmtUtils]: Spent 6.37s on a formula simplification. DAG size of input: 106 DAG size of output: 100 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 14:29:25,006 WARN L234 SmtUtils]: Spent 6.18s on a formula simplification. DAG size of input: 51 DAG size of output: 46 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 14:29:31,248 WARN L539 Checker$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 14:29:33,269 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 14:29:36,228 WARN L539 Checker$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 14:30:19,205 WARN L234 SmtUtils]: Spent 8.21s on a formula simplification. DAG size of input: 66 DAG size of output: 57 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 14:30:28,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 14:30:35,614 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 14:30:47,436 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 14:30:58,051 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse0 (= c_~top~0 0)) (.cse1 (select |c_#memory_int| |c_t1Thread1of1ForFork1_push_~stack#1.base|)) (.cse2 (+ |c_~#arr~0.offset| (- 4) (* c_~top~0 4)))) (and (or .cse0 (forall ((v_ArrVal_1052 Int) (v_ArrVal_1053 (Array Int Int)) (|v_t1Thread1of1ForFork1_get_top_#res#1_58| Int)) (or (not (= 4294967294 (mod (select (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork1_push_~stack#1.base| (store .cse1 (+ |c_t1Thread1of1ForFork1_push_~stack#1.offset| (* |v_t1Thread1of1ForFork1_get_top_#res#1_58| 4)) v_ArrVal_1052)) |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1053) |c_~#arr~0.base|) .cse2) 4294967296))) (< |v_t1Thread1of1ForFork1_get_top_#res#1_58| c_~top~0)))) (or .cse0 (forall ((v_ArrVal_1053 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1053) |c_~#arr~0.base|) .cse2) 4294967296))))) (or (= |c_t1Thread1of1ForFork1_inc_top_#t~post31#1| 0) (forall ((v_ArrVal_1053 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1053) |c_~#arr~0.base|) (+ (* |c_t1Thread1of1ForFork1_inc_top_#t~post31#1| 4) |c_~#arr~0.offset| (- 4))) 4294967296) 4294967294)))) (or .cse0 (forall ((v_ArrVal_1052 Int) (v_ArrVal_1053 (Array Int Int))) (not (= (mod (select (select (store (store |c_#memory_int| |c_t1Thread1of1ForFork1_push_~stack#1.base| (store .cse1 (+ |c_t1Thread1of1ForFork1_push_~stack#1.offset| (* |c_t1Thread1of1ForFork1_get_top_#res#1| 4)) v_ArrVal_1052)) |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1053) |c_~#arr~0.base|) .cse2) 4294967296) 4294967294)))))) is different from false [2023-08-26 14:31:00,711 WARN L539 Checker$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 14:31:21,875 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (* c_~top~0 4))) (let ((.cse0 (= c_~top~0 0)) (.cse1 (+ |c_~#arr~0.offset| (- 4) .cse2))) (and (or .cse0 (forall ((v_ArrVal_1052 Int) (|v_t1Thread1of1ForFork1_push_~stack#1.offset_95| Int) (v_ArrVal_1053 (Array Int Int)) (|v_t1Thread1of1ForFork1_get_top_#res#1_58| Int)) (or (< |v_t1Thread1of1ForFork1_push_~stack#1.offset_95| |c_~#arr~0.offset|) (not (= 4294967294 (mod (select (select (store (store |c_#memory_int| |c_~#arr~0.base| (store (select |c_#memory_int| |c_~#arr~0.base|) (+ (* |v_t1Thread1of1ForFork1_get_top_#res#1_58| 4) |v_t1Thread1of1ForFork1_push_~stack#1.offset_95|) v_ArrVal_1052)) |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1053) |c_~#arr~0.base|) .cse1) 4294967296))) (< |v_t1Thread1of1ForFork1_get_top_#res#1_58| c_~top~0)))) (or .cse0 (forall ((v_ArrVal_1053 (Array Int Int))) (not (= 4294967294 (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1053) |c_~#arr~0.base|) .cse1) 4294967296))))) (or (forall ((v_ArrVal_1053 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_1053) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| .cse2 (- 8))) 4294967296) 4294967294))) (= c_~top~0 1))))) is different from false [2023-08-26 14:31:25,942 WARN L539 Checker$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 14:31:36,518 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 14:31:48,139 WARN L234 SmtUtils]: Spent 6.21s on a formula simplification. DAG size of input: 99 DAG size of output: 91 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 14:32:33,071 WARN L234 SmtUtils]: Spent 6.08s on a formula simplification. DAG size of input: 86 DAG size of output: 78 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 14:32:53,811 WARN L539 Checker$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 14:33:08,408 WARN L234 SmtUtils]: Spent 6.60s on a formula simplification. DAG size of input: 106 DAG size of output: 100 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 14:33:38,254 WARN L234 SmtUtils]: Spent 7.97s on a formula simplification. DAG size of input: 98 DAG size of output: 92 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 14:33:46,418 WARN L234 SmtUtils]: Spent 5.01s on a formula simplification. DAG size of input: 121 DAG size of output: 113 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-08-26 14:33:54,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-26 14:35:13,824 INFO L124 PetriNetUnfolderBase]: 28687/53967 cut-off events. [2023-08-26 14:35:13,824 INFO L125 PetriNetUnfolderBase]: For 405360/405360 co-relation queries the response was YES. [2023-08-26 14:35:15,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 312598 conditions, 53967 events. 28687/53967 cut-off events. For 405360/405360 co-relation queries the response was YES. Maximal size of possible extension queue 972. Compared 456544 event pairs, 3969 based on Foata normal form. 606/53753 useless extension candidates. Maximal degree in co-relation 312384. Up to 17736 conditions per place. [2023-08-26 14:35:15,647 INFO L140 encePairwiseOnDemand]: 320/349 looper letters, 1587 selfloop transitions, 2185 changer transitions 190/3962 dead transitions. [2023-08-26 14:35:15,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 965 places, 3962 transitions, 62258 flow [2023-08-26 14:35:15,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 249 states. [2023-08-26 14:35:15,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2023-08-26 14:35:15,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 23861 transitions. [2023-08-26 14:35:15,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.27457681729784467 [2023-08-26 14:35:15,668 INFO L72 ComplementDD]: Start complementDD. Operand 249 states and 23861 transitions. [2023-08-26 14:35:15,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 249 states and 23861 transitions. [2023-08-26 14:35:15,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 14:35:15,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 249 states and 23861 transitions. [2023-08-26 14:35:15,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 250 states, 249 states have (on average 95.8273092369478) internal successors, (23861), 249 states have internal predecessors, (23861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:35:15,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 250 states, 250 states have (on average 349.0) internal successors, (87250), 250 states have internal predecessors, (87250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:35:15,776 INFO L81 ComplementDD]: Finished complementDD. Result has 250 states, 250 states have (on average 349.0) internal successors, (87250), 250 states have internal predecessors, (87250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 14:35:15,776 INFO L175 Difference]: Start difference. First operand has 792 places, 1866 transitions, 32497 flow. Second operand 249 states and 23861 transitions. [2023-08-26 14:35:15,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 965 places, 3962 transitions, 62258 flow Received shutdown request... [2023-08-26 14:35:21,482 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t2Err2ASSERT_VIOLATIONASSERT (21 of 22 remaining) [2023-08-26 14:35:21,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-26 14:35:21,497 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-26 14:35:21,497 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-26 14:35:21,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-26 14:35:21,688 WARN L619 AbstractCegarLoop]: Verification canceled: while executing RemoveRedundantFlow. [2023-08-26 14:35:21,689 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 22 remaining) [2023-08-26 14:35:21,689 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 22 remaining) [2023-08-26 14:35:21,689 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 22 remaining) [2023-08-26 14:35:21,690 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 22 remaining) [2023-08-26 14:35:21,690 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 22 remaining) [2023-08-26 14:35:21,690 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 22 remaining) [2023-08-26 14:35:21,690 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 22 remaining) [2023-08-26 14:35:21,690 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 22 remaining) [2023-08-26 14:35:21,690 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 22 remaining) [2023-08-26 14:35:21,690 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 22 remaining) [2023-08-26 14:35:21,690 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 22 remaining) [2023-08-26 14:35:21,690 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 22 remaining) [2023-08-26 14:35:21,691 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t1Err2ASSERT_VIOLATIONASSERT (8 of 22 remaining) [2023-08-26 14:35:21,691 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t2Err2ASSERT_VIOLATIONASSERT (7 of 22 remaining) [2023-08-26 14:35:21,691 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 22 remaining) [2023-08-26 14:35:21,691 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 22 remaining) [2023-08-26 14:35:21,691 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 22 remaining) [2023-08-26 14:35:21,691 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 22 remaining) [2023-08-26 14:35:21,691 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t1Err2ASSERT_VIOLATIONASSERT (2 of 22 remaining) [2023-08-26 14:35:21,691 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 22 remaining) [2023-08-26 14:35:21,691 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 22 remaining) [2023-08-26 14:35:21,692 INFO L445 BasicCegarLoop]: Path program histogram: [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 14:35:21,696 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 14:35:21,696 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 14:35:21,698 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 02:35:21 BasicIcfg [2023-08-26 14:35:21,698 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 14:35:21,698 INFO L158 Benchmark]: Toolchain (without parser) took 812694.48ms. Allocated memory was 364.9MB in the beginning and 5.4GB in the end (delta: 5.0GB). Free memory was 339.3MB in the beginning and 2.7GB in the end (delta: -2.4GB). Peak memory consumption was 2.7GB. Max. memory is 16.0GB. [2023-08-26 14:35:21,698 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 364.9MB. Free memory is still 341.0MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 14:35:21,698 INFO L158 Benchmark]: CACSL2BoogieTranslator took 569.97ms. Allocated memory is still 364.9MB. Free memory was 339.3MB in the beginning and 310.1MB in the end (delta: 29.2MB). Peak memory consumption was 29.4MB. Max. memory is 16.0GB. [2023-08-26 14:35:21,699 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.69ms. Allocated memory is still 364.9MB. Free memory was 310.1MB in the beginning and 307.0MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 14:35:21,699 INFO L158 Benchmark]: Boogie Preprocessor took 55.89ms. Allocated memory is still 364.9MB. Free memory was 307.0MB in the beginning and 305.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 14:35:21,699 INFO L158 Benchmark]: RCFGBuilder took 423.09ms. Allocated memory is still 364.9MB. Free memory was 305.4MB in the beginning and 285.9MB in the end (delta: 19.6MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-26 14:35:21,699 INFO L158 Benchmark]: TraceAbstraction took 811581.62ms. Allocated memory was 364.9MB in the beginning and 5.4GB in the end (delta: 5.0GB). Free memory was 285.5MB in the beginning and 2.7GB in the end (delta: -2.4GB). Peak memory consumption was 2.7GB. Max. memory is 16.0GB. [2023-08-26 14:35:21,701 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 364.9MB. Free memory is still 341.0MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 569.97ms. Allocated memory is still 364.9MB. Free memory was 339.3MB in the beginning and 310.1MB in the end (delta: 29.2MB). Peak memory consumption was 29.4MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 57.69ms. Allocated memory is still 364.9MB. Free memory was 310.1MB in the beginning and 307.0MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 55.89ms. Allocated memory is still 364.9MB. Free memory was 307.0MB in the beginning and 305.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 423.09ms. Allocated memory is still 364.9MB. Free memory was 305.4MB in the beginning and 285.9MB in the end (delta: 19.6MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * TraceAbstraction took 811581.62ms. Allocated memory was 364.9MB in the beginning and 5.4GB in the end (delta: 5.0GB). Free memory was 285.5MB in the beginning and 2.7GB in the end (delta: -2.4GB). Peak memory consumption was 2.7GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 261]: Unsoundness Warning unspecified type, defaulting to int C: short [261] - GenericResultAtLocation [Line: 261]: Unsoundness Warning unspecified type, defaulting to int C: short [261] - GenericResultAtLocation [Line: 753]: Unsoundness Warning unspecified type, defaulting to int C: unsigned short [753] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.2s, 155 PlacesBefore, 46 PlacesAfterwards, 160 TransitionsBefore, 44 TransitionsAfterwards, 8840 CoEnabledTransitionPairs, 6 FixpointIterations, 36 TrivialSequentialCompositions, 104 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 31 ConcurrentYvCompositions, 7 ChoiceCompositions, 178 TotalNumberOfCompositions, 13733 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 9590, independent: 9375, independent conditional: 0, independent unconditional: 9375, dependent: 215, dependent conditional: 0, dependent unconditional: 215, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 5015, independent: 4962, independent conditional: 0, independent unconditional: 4962, dependent: 53, dependent conditional: 0, dependent unconditional: 53, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 9590, independent: 4413, independent conditional: 0, independent unconditional: 4413, dependent: 162, dependent conditional: 0, dependent unconditional: 162, unknown: 5015, unknown conditional: 0, unknown unconditional: 5015] , Statistics on independence cache: Total cache size (in pairs): 236, Positive cache size: 217, Positive conditional cache size: 0, Positive unconditional cache size: 217, Negative cache size: 19, Negative conditional cache size: 0, Negative unconditional cache size: 19, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 20]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 1021]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 1022]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: 20]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - TimeoutResultAtElement [Line: -1]: Timeout (TraceAbstraction) Unable to prove that pointer dereference always succeeds Cancelled while executing RemoveRedundantFlow. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 264 locations, 22 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 811.4s, OverallIterations: 28, TraceHistogramMax: 4, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 755.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.4s, HoareTripleCheckerStatistics: 731 mSolverCounterUnknown, 14693 SdHoareTripleChecker+Valid, 129.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 14693 mSDsluCounter, 13 SdHoareTripleChecker+Invalid, 123.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 2324 IncrementalHoareTripleChecker+Unchecked, 10 mSDsCounter, 1125 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 54128 IncrementalHoareTripleChecker+Invalid, 58308 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1125 mSolverCounterUnsat, 3 mSDtfsCounter, 54128 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 731 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1848 GetRequests, 359 SyntacticMatches, 31 SemanticMatches, 1458 ConstructedPredicates, 6 IntricatePredicates, 2 DeprecatedPredicates, 74669 ImplicationChecksByTransitivity, 569.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32497occurred in iteration=27, InterpolantAutomatonStates: 738, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 45.9s InterpolantComputationTime, 931 NumberOfCodeBlocks, 923 NumberOfCodeBlocksAsserted, 47 NumberOfCheckSat, 1200 ConstructedInterpolants, 83 QuantifiedInterpolants, 21562 SizeOfPredicates, 249 NumberOfNonLiveVariables, 3709 ConjunctsInSsa, 640 ConjunctsInUnsatCore, 52 InterpolantComputations, 17 PerfectInterpolantSequences, 63/460 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown