/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 12:44:54,444 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 12:44:54,525 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-08-26 12:44:54,530 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 12:44:54,531 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 12:44:54,563 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 12:44:54,564 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 12:44:54,569 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 12:44:54,569 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 12:44:54,573 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 12:44:54,573 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 12:44:54,573 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 12:44:54,573 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 12:44:54,574 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 12:44:54,574 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 12:44:54,574 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 12:44:54,574 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 12:44:54,575 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 12:44:54,575 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 12:44:54,575 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 12:44:54,575 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 12:44:54,576 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 12:44:54,576 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 12:44:54,577 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 12:44:54,577 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 12:44:54,577 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 12:44:54,577 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 12:44:54,577 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:44:54,578 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 12:44:54,578 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 12:44:54,579 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 12:44:54,579 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 12:44:54,579 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 12:44:54,579 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 12:44:54,580 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 12:44:54,580 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 12:44:54,935 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 12:44:54,960 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 12:44:54,962 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 12:44:54,963 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 12:44:54,964 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 12:44:54,965 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2023-08-26 12:44:56,096 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 12:44:56,410 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 12:44:56,411 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2023-08-26 12:44:56,425 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/291335a68/0bc296c6c6bc4468a8c47fcbc0ea3c4f/FLAG2b90773e5 [2023-08-26 12:44:56,443 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/291335a68/0bc296c6c6bc4468a8c47fcbc0ea3c4f [2023-08-26 12:44:56,447 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 12:44:56,449 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 12:44:56,451 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 12:44:56,451 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 12:44:56,454 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 12:44:56,455 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:44:56" (1/1) ... [2023-08-26 12:44:56,455 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4cacde4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:44:56, skipping insertion in model container [2023-08-26 12:44:56,456 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:44:56" (1/1) ... [2023-08-26 12:44:56,513 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 12:44:57,001 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:44:57,025 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 12:44:57,050 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 12:44:57,051 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 12:44:57,057 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [736] [2023-08-26 12:44:57,093 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:44:57,155 INFO L206 MainTranslator]: Completed translation [2023-08-26 12:44:57,156 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:44:57 WrapperNode [2023-08-26 12:44:57,156 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 12:44:57,157 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 12:44:57,157 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 12:44:57,157 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 12:44:57,163 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:44:57" (1/1) ... [2023-08-26 12:44:57,184 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:44:57" (1/1) ... [2023-08-26 12:44:57,216 INFO L138 Inliner]: procedures = 270, calls = 42, calls flagged for inlining = 7, calls inlined = 8, statements flattened = 202 [2023-08-26 12:44:57,216 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 12:44:57,217 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 12:44:57,217 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 12:44:57,217 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 12:44:57,224 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:44:57" (1/1) ... [2023-08-26 12:44:57,224 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:44:57" (1/1) ... [2023-08-26 12:44:57,227 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:44:57" (1/1) ... [2023-08-26 12:44:57,228 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:44:57" (1/1) ... [2023-08-26 12:44:57,234 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:44:57" (1/1) ... [2023-08-26 12:44:57,240 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:44:57" (1/1) ... [2023-08-26 12:44:57,241 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:44:57" (1/1) ... [2023-08-26 12:44:57,243 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:44:57" (1/1) ... [2023-08-26 12:44:57,246 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 12:44:57,246 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 12:44:57,246 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 12:44:57,247 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 12:44:57,249 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:44:57" (1/1) ... [2023-08-26 12:44:57,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:44:57,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:44:57,277 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-26 12:44:57,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-26 12:44:57,318 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 12:44:57,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 12:44:57,318 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 12:44:57,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 12:44:57,318 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 12:44:57,318 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 12:44:57,318 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-26 12:44:57,319 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-26 12:44:57,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 12:44:57,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 12:44:57,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 12:44:57,320 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-26 12:44:57,436 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 12:44:57,438 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 12:44:57,726 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 12:44:57,733 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 12:44:57,734 INFO L302 CfgBuilder]: Removed 23 assume(true) statements. [2023-08-26 12:44:57,736 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:44:57 BoogieIcfgContainer [2023-08-26 12:44:57,736 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 12:44:57,738 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 12:44:57,738 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 12:44:57,741 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 12:44:57,741 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 12:44:56" (1/3) ... [2023-08-26 12:44:57,741 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@532994b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:44:57, skipping insertion in model container [2023-08-26 12:44:57,742 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:44:57" (2/3) ... [2023-08-26 12:44:57,742 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@532994b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:44:57, skipping insertion in model container [2023-08-26 12:44:57,742 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:44:57" (3/3) ... [2023-08-26 12:44:57,743 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_77-tricky_address4_racing.i [2023-08-26 12:44:57,757 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 12:44:57,757 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2023-08-26 12:44:57,757 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 12:44:57,837 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-26 12:44:57,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 228 transitions, 464 flow [2023-08-26 12:44:58,002 INFO L124 PetriNetUnfolderBase]: 48/318 cut-off events. [2023-08-26 12:44:58,004 INFO L125 PetriNetUnfolderBase]: For 1/2 co-relation queries the response was YES. [2023-08-26 12:44:58,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324 conditions, 318 events. 48/318 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1193 event pairs, 0 based on Foata normal form. 0/226 useless extension candidates. Maximal degree in co-relation 180. Up to 8 conditions per place. [2023-08-26 12:44:58,015 INFO L82 GeneralOperation]: Start removeDead. Operand has 198 places, 228 transitions, 464 flow [2023-08-26 12:44:58,030 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 198 places, 228 transitions, 464 flow [2023-08-26 12:44:58,034 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:44:58,045 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 198 places, 228 transitions, 464 flow [2023-08-26 12:44:58,049 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 198 places, 228 transitions, 464 flow [2023-08-26 12:44:58,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 198 places, 228 transitions, 464 flow [2023-08-26 12:44:58,116 INFO L124 PetriNetUnfolderBase]: 48/318 cut-off events. [2023-08-26 12:44:58,116 INFO L125 PetriNetUnfolderBase]: For 1/2 co-relation queries the response was YES. [2023-08-26 12:44:58,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 324 conditions, 318 events. 48/318 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1193 event pairs, 0 based on Foata normal form. 0/226 useless extension candidates. Maximal degree in co-relation 180. Up to 8 conditions per place. [2023-08-26 12:44:58,128 INFO L119 LiptonReduction]: Number of co-enabled transitions 16320 [2023-08-26 12:45:01,993 INFO L134 LiptonReduction]: Checked pairs total: 30848 [2023-08-26 12:45:01,993 INFO L136 LiptonReduction]: Total number of compositions: 217 [2023-08-26 12:45:02,005 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:45:02,010 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;@639373a7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:45:02,011 INFO L358 AbstractCegarLoop]: Starting to check reachability of 38 error locations. [2023-08-26 12:45:02,013 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:45:02,013 INFO L124 PetriNetUnfolderBase]: 1/5 cut-off events. [2023-08-26 12:45:02,013 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:45:02,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:45:02,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 12:45:02,014 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-26 12:45:02,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:45:02,018 INFO L85 PathProgramCache]: Analyzing trace with hash 914444, now seen corresponding path program 1 times [2023-08-26 12:45:02,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:45:02,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733503425] [2023-08-26 12:45:02,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:45:02,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:45:02,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:45:02,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:45:02,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:45:02,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733503425] [2023-08-26 12:45:02,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733503425] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:45:02,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:45:02,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:45:02,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253148150] [2023-08-26 12:45:02,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:45:02,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:45:02,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:45:02,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:45:02,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:45:02,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 445 [2023-08-26 12:45:02,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 92 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:02,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:45:02,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 445 [2023-08-26 12:45:02,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:45:02,585 INFO L124 PetriNetUnfolderBase]: 563/1291 cut-off events. [2023-08-26 12:45:02,585 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 12:45:02,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2403 conditions, 1291 events. 563/1291 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 8513 event pairs, 513 based on Foata normal form. 98/936 useless extension candidates. Maximal degree in co-relation 2324. Up to 1105 conditions per place. [2023-08-26 12:45:02,592 INFO L140 encePairwiseOnDemand]: 415/445 looper letters, 51 selfloop transitions, 2 changer transitions 0/66 dead transitions. [2023-08-26 12:45:02,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 66 transitions, 246 flow [2023-08-26 12:45:02,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:45:02,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:45:02,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 642 transitions. [2023-08-26 12:45:02,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48089887640449436 [2023-08-26 12:45:02,606 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 642 transitions. [2023-08-26 12:45:02,606 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 642 transitions. [2023-08-26 12:45:02,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:45:02,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 642 transitions. [2023-08-26 12:45:02,614 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.0) internal successors, (642), 3 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:02,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 445.0) internal successors, (1780), 4 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:02,620 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 445.0) internal successors, (1780), 4 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:02,622 INFO L175 Difference]: Start difference. First operand has 70 places, 92 transitions, 192 flow. Second operand 3 states and 642 transitions. [2023-08-26 12:45:02,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 66 transitions, 246 flow [2023-08-26 12:45:02,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 66 transitions, 246 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:45:02,627 INFO L231 Difference]: Finished difference. Result has 67 places, 66 transitions, 150 flow [2023-08-26 12:45:02,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=445, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=150, PETRI_PLACES=67, PETRI_TRANSITIONS=66} [2023-08-26 12:45:02,632 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -3 predicate places. [2023-08-26 12:45:02,632 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 66 transitions, 150 flow [2023-08-26 12:45:02,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:02,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:45:02,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 12:45:02,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 12:45:02,633 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-26 12:45:02,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:45:02,634 INFO L85 PathProgramCache]: Analyzing trace with hash 28310633, now seen corresponding path program 1 times [2023-08-26 12:45:02,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:45:02,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905270886] [2023-08-26 12:45:02,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:45:02,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:45:02,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:45:02,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:45:02,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:45:02,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905270886] [2023-08-26 12:45:02,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905270886] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:45:02,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799107325] [2023-08-26 12:45:02,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:45:02,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:45:02,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:45:02,901 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 12:45:02,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-26 12:45:02,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:45:02,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-26 12:45:02,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:45:03,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:45:03,046 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:45:03,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:45:03,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799107325] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:45:03,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:45:03,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-26 12:45:03,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625244074] [2023-08-26 12:45:03,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:45:03,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 12:45:03,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:45:03,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 12:45:03,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-26 12:45:03,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 445 [2023-08-26 12:45:03,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 66 transitions, 150 flow. Second operand has 7 states, 7 states have (on average 188.28571428571428) internal successors, (1318), 7 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:03,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:45:03,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 445 [2023-08-26 12:45:03,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:45:03,348 INFO L124 PetriNetUnfolderBase]: 563/1294 cut-off events. [2023-08-26 12:45:03,348 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 12:45:03,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2419 conditions, 1294 events. 563/1294 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 8514 event pairs, 513 based on Foata normal form. 0/841 useless extension candidates. Maximal degree in co-relation 2407. Up to 1105 conditions per place. [2023-08-26 12:45:03,356 INFO L140 encePairwiseOnDemand]: 442/445 looper letters, 51 selfloop transitions, 5 changer transitions 0/69 dead transitions. [2023-08-26 12:45:03,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 69 transitions, 274 flow [2023-08-26 12:45:03,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 12:45:03,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 12:45:03,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1181 transitions. [2023-08-26 12:45:03,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44232209737827716 [2023-08-26 12:45:03,360 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1181 transitions. [2023-08-26 12:45:03,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1181 transitions. [2023-08-26 12:45:03,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:45:03,362 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1181 transitions. [2023-08-26 12:45:03,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 196.83333333333334) internal successors, (1181), 6 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:03,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 445.0) internal successors, (3115), 7 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:03,371 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 445.0) internal successors, (3115), 7 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:03,371 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 150 flow. Second operand 6 states and 1181 transitions. [2023-08-26 12:45:03,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 69 transitions, 274 flow [2023-08-26 12:45:03,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 69 transitions, 270 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-26 12:45:03,377 INFO L231 Difference]: Finished difference. Result has 74 places, 69 transitions, 182 flow [2023-08-26 12:45:03,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=445, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=182, PETRI_PLACES=74, PETRI_TRANSITIONS=69} [2023-08-26 12:45:03,378 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 4 predicate places. [2023-08-26 12:45:03,379 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 69 transitions, 182 flow [2023-08-26 12:45:03,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 188.28571428571428) internal successors, (1318), 7 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:03,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:45:03,380 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-26 12:45:03,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-26 12:45:03,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:45:03,588 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-26 12:45:03,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:45:03,588 INFO L85 PathProgramCache]: Analyzing trace with hash 1551575821, now seen corresponding path program 2 times [2023-08-26 12:45:03,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:45:03,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459286438] [2023-08-26 12:45:03,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:45:03,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:45:03,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:45:03,682 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-26 12:45:03,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:45:03,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459286438] [2023-08-26 12:45:03,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459286438] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:45:03,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:45:03,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:45:03,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005391888] [2023-08-26 12:45:03,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:45:03,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:45:03,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:45:03,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:45:03,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:45:03,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 445 [2023-08-26 12:45:03,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 69 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:03,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:45:03,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 445 [2023-08-26 12:45:03,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:45:03,893 INFO L124 PetriNetUnfolderBase]: 648/1375 cut-off events. [2023-08-26 12:45:03,894 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 12:45:03,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2685 conditions, 1375 events. 648/1375 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8612 event pairs, 575 based on Foata normal form. 0/877 useless extension candidates. Maximal degree in co-relation 2651. Up to 1226 conditions per place. [2023-08-26 12:45:03,902 INFO L140 encePairwiseOnDemand]: 441/445 looper letters, 77 selfloop transitions, 2 changer transitions 3/90 dead transitions. [2023-08-26 12:45:03,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 90 transitions, 388 flow [2023-08-26 12:45:03,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:45:03,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:45:03,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 560 transitions. [2023-08-26 12:45:03,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41947565543071164 [2023-08-26 12:45:03,905 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 560 transitions. [2023-08-26 12:45:03,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 560 transitions. [2023-08-26 12:45:03,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:45:03,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 560 transitions. [2023-08-26 12:45:03,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 186.66666666666666) internal successors, (560), 3 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:03,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 445.0) internal successors, (1780), 4 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:03,911 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 445.0) internal successors, (1780), 4 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:03,911 INFO L175 Difference]: Start difference. First operand has 74 places, 69 transitions, 182 flow. Second operand 3 states and 560 transitions. [2023-08-26 12:45:03,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 90 transitions, 388 flow [2023-08-26 12:45:03,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 90 transitions, 374 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-26 12:45:03,916 INFO L231 Difference]: Finished difference. Result has 73 places, 67 transitions, 168 flow [2023-08-26 12:45:03,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=445, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=73, PETRI_TRANSITIONS=67} [2023-08-26 12:45:03,916 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 3 predicate places. [2023-08-26 12:45:03,917 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 67 transitions, 168 flow [2023-08-26 12:45:03,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:03,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:45:03,917 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-26 12:45:03,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 12:45:03,918 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-26 12:45:03,918 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:45:03,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1551575820, now seen corresponding path program 1 times [2023-08-26 12:45:03,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:45:03,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740966595] [2023-08-26 12:45:03,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:45:03,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:45:03,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:45:03,997 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:45:03,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:45:03,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740966595] [2023-08-26 12:45:03,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740966595] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:45:03,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878070938] [2023-08-26 12:45:03,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:45:03,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:45:03,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:45:03,999 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 12:45:04,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-26 12:45:04,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:45:04,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 12:45:04,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:45:04,080 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:45:04,080 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:45:04,124 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:45:04,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878070938] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:45:04,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:45:04,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-26 12:45:04,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292878179] [2023-08-26 12:45:04,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:45:04,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 12:45:04,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:45:04,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 12:45:04,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-26 12:45:04,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 445 [2023-08-26 12:45:04,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 67 transitions, 168 flow. Second operand has 13 states, 13 states have (on average 188.15384615384616) internal successors, (2446), 13 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:04,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:45:04,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 445 [2023-08-26 12:45:04,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:45:04,317 INFO L124 PetriNetUnfolderBase]: 523/1210 cut-off events. [2023-08-26 12:45:04,317 INFO L125 PetriNetUnfolderBase]: For 58/58 co-relation queries the response was YES. [2023-08-26 12:45:04,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2302 conditions, 1210 events. 523/1210 cut-off events. For 58/58 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7821 event pairs, 475 based on Foata normal form. 6/841 useless extension candidates. Maximal degree in co-relation 2250. Up to 1025 conditions per place. [2023-08-26 12:45:04,324 INFO L140 encePairwiseOnDemand]: 442/445 looper letters, 49 selfloop transitions, 11 changer transitions 0/73 dead transitions. [2023-08-26 12:45:04,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 73 transitions, 324 flow [2023-08-26 12:45:04,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 12:45:04,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 12:45:04,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2310 transitions. [2023-08-26 12:45:04,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43258426966292135 [2023-08-26 12:45:04,330 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2310 transitions. [2023-08-26 12:45:04,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2310 transitions. [2023-08-26 12:45:04,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:45:04,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2310 transitions. [2023-08-26 12:45:04,335 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 192.5) internal successors, (2310), 12 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:04,343 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 445.0) internal successors, (5785), 13 states have internal predecessors, (5785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:04,345 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 445.0) internal successors, (5785), 13 states have internal predecessors, (5785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:04,345 INFO L175 Difference]: Start difference. First operand has 73 places, 67 transitions, 168 flow. Second operand 12 states and 2310 transitions. [2023-08-26 12:45:04,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 73 transitions, 324 flow [2023-08-26 12:45:04,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 73 transitions, 320 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:45:04,348 INFO L231 Difference]: Finished difference. Result has 88 places, 73 transitions, 248 flow [2023-08-26 12:45:04,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=445, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=248, PETRI_PLACES=88, PETRI_TRANSITIONS=73} [2023-08-26 12:45:04,349 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 18 predicate places. [2023-08-26 12:45:04,349 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 73 transitions, 248 flow [2023-08-26 12:45:04,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 188.15384615384616) internal successors, (2446), 13 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:04,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:45:04,350 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2023-08-26 12:45:04,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-26 12:45:04,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-26 12:45:04,556 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-26 12:45:04,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:45:04,557 INFO L85 PathProgramCache]: Analyzing trace with hash 934440332, now seen corresponding path program 2 times [2023-08-26 12:45:04,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:45:04,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135893142] [2023-08-26 12:45:04,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:45:04,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:45:04,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:45:04,665 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 12:45:04,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:45:04,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135893142] [2023-08-26 12:45:04,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135893142] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:45:04,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:45:04,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:45:04,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819759000] [2023-08-26 12:45:04,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:45:04,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:45:04,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:45:04,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:45:04,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:45:04,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 445 [2023-08-26 12:45:04,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 73 transitions, 248 flow. Second operand has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:04,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:45:04,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 445 [2023-08-26 12:45:04,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:45:04,856 INFO L124 PetriNetUnfolderBase]: 543/1217 cut-off events. [2023-08-26 12:45:04,856 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2023-08-26 12:45:04,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2409 conditions, 1217 events. 543/1217 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 8125 event pairs, 0 based on Foata normal form. 0/843 useless extension candidates. Maximal degree in co-relation 2333. Up to 1084 conditions per place. [2023-08-26 12:45:04,863 INFO L140 encePairwiseOnDemand]: 441/445 looper letters, 81 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2023-08-26 12:45:04,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 94 transitions, 456 flow [2023-08-26 12:45:04,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:45:04,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:45:04,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 540 transitions. [2023-08-26 12:45:04,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4044943820224719 [2023-08-26 12:45:04,866 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 540 transitions. [2023-08-26 12:45:04,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 540 transitions. [2023-08-26 12:45:04,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:45:04,866 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 540 transitions. [2023-08-26 12:45:04,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:04,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 445.0) internal successors, (1780), 4 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:04,870 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 445.0) internal successors, (1780), 4 states have internal predecessors, (1780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:04,870 INFO L175 Difference]: Start difference. First operand has 88 places, 73 transitions, 248 flow. Second operand 3 states and 540 transitions. [2023-08-26 12:45:04,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 94 transitions, 456 flow [2023-08-26 12:45:04,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 94 transitions, 408 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-26 12:45:04,877 INFO L231 Difference]: Finished difference. Result has 86 places, 73 transitions, 210 flow [2023-08-26 12:45:04,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=445, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=210, PETRI_PLACES=86, PETRI_TRANSITIONS=73} [2023-08-26 12:45:04,879 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, 16 predicate places. [2023-08-26 12:45:04,879 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 73 transitions, 210 flow [2023-08-26 12:45:04,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.33333333333334) internal successors, (469), 3 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:04,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:45:04,880 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-08-26 12:45:04,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 12:45:04,880 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-26 12:45:04,880 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:45:04,880 INFO L85 PathProgramCache]: Analyzing trace with hash -2065438184, now seen corresponding path program 1 times [2023-08-26 12:45:04,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:45:04,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076470570] [2023-08-26 12:45:04,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:45:04,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:45:04,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:45:05,051 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 12:45:05,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:45:05,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076470570] [2023-08-26 12:45:05,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076470570] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:45:05,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127103087] [2023-08-26 12:45:05,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:45:05,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:45:05,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:45:05,053 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 12:45:05,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-26 12:45:05,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:45:05,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 12:45:05,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:45:05,169 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-26 12:45:05,212 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 12:45:05,212 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:45:05,269 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 12:45:05,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127103087] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:45:05,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:45:05,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-26 12:45:05,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834402788] [2023-08-26 12:45:05,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:45:05,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 12:45:05,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:45:05,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 12:45:05,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-26 12:45:05,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 445 [2023-08-26 12:45:05,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 73 transitions, 210 flow. Second operand has 8 states, 8 states have (on average 157.125) internal successors, (1257), 8 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:05,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:45:05,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 445 [2023-08-26 12:45:05,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:45:05,419 INFO L124 PetriNetUnfolderBase]: 44/136 cut-off events. [2023-08-26 12:45:05,419 INFO L125 PetriNetUnfolderBase]: For 103/103 co-relation queries the response was YES. [2023-08-26 12:45:05,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342 conditions, 136 events. 44/136 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 435 event pairs, 16 based on Foata normal form. 21/139 useless extension candidates. Maximal degree in co-relation 289. Up to 82 conditions per place. [2023-08-26 12:45:05,420 INFO L140 encePairwiseOnDemand]: 441/445 looper letters, 55 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2023-08-26 12:45:05,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 64 transitions, 299 flow [2023-08-26 12:45:05,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:45:05,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:45:05,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 669 transitions. [2023-08-26 12:45:05,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3758426966292135 [2023-08-26 12:45:05,423 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 669 transitions. [2023-08-26 12:45:05,423 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 669 transitions. [2023-08-26 12:45:05,423 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:45:05,423 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 669 transitions. [2023-08-26 12:45:05,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 167.25) internal successors, (669), 4 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:05,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 445.0) internal successors, (2225), 5 states have internal predecessors, (2225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:05,428 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 445.0) internal successors, (2225), 5 states have internal predecessors, (2225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:05,428 INFO L175 Difference]: Start difference. First operand has 86 places, 73 transitions, 210 flow. Second operand 4 states and 669 transitions. [2023-08-26 12:45:05,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 64 transitions, 299 flow [2023-08-26 12:45:05,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 64 transitions, 293 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 12:45:05,430 INFO L231 Difference]: Finished difference. Result has 58 places, 43 transitions, 141 flow [2023-08-26 12:45:05,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=445, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=141, PETRI_PLACES=58, PETRI_TRANSITIONS=43} [2023-08-26 12:45:05,431 INFO L281 CegarLoopForPetriNet]: 70 programPoint places, -12 predicate places. [2023-08-26 12:45:05,431 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 43 transitions, 141 flow [2023-08-26 12:45:05,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 157.125) internal successors, (1257), 8 states have internal predecessors, (1257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:05,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:45:05,432 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2023-08-26 12:45:05,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-26 12:45:05,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:45:05,638 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 35 more)] === [2023-08-26 12:45:05,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:45:05,639 INFO L85 PathProgramCache]: Analyzing trace with hash 395926377, now seen corresponding path program 1 times [2023-08-26 12:45:05,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:45:05,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482901803] [2023-08-26 12:45:05,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:45:05,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:45:05,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:45:05,665 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 12:45:05,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:45:05,707 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 12:45:05,707 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 12:45:05,708 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (37 of 38 remaining) [2023-08-26 12:45:05,710 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 38 remaining) [2023-08-26 12:45:05,711 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 38 remaining) [2023-08-26 12:45:05,714 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 38 remaining) [2023-08-26 12:45:05,715 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 38 remaining) [2023-08-26 12:45:05,715 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 38 remaining) [2023-08-26 12:45:05,716 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 38 remaining) [2023-08-26 12:45:05,716 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 38 remaining) [2023-08-26 12:45:05,716 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 38 remaining) [2023-08-26 12:45:05,716 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 38 remaining) [2023-08-26 12:45:05,716 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 38 remaining) [2023-08-26 12:45:05,717 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 38 remaining) [2023-08-26 12:45:05,717 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 38 remaining) [2023-08-26 12:45:05,717 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 38 remaining) [2023-08-26 12:45:05,717 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 38 remaining) [2023-08-26 12:45:05,717 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONASSERT (22 of 38 remaining) [2023-08-26 12:45:05,717 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 38 remaining) [2023-08-26 12:45:05,718 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 38 remaining) [2023-08-26 12:45:05,719 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 38 remaining) [2023-08-26 12:45:05,719 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 38 remaining) [2023-08-26 12:45:05,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 38 remaining) [2023-08-26 12:45:05,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 38 remaining) [2023-08-26 12:45:05,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 38 remaining) [2023-08-26 12:45:05,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 38 remaining) [2023-08-26 12:45:05,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 38 remaining) [2023-08-26 12:45:05,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 38 remaining) [2023-08-26 12:45:05,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONASSERT (11 of 38 remaining) [2023-08-26 12:45:05,721 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 38 remaining) [2023-08-26 12:45:05,721 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 38 remaining) [2023-08-26 12:45:05,721 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 38 remaining) [2023-08-26 12:45:05,721 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 38 remaining) [2023-08-26 12:45:05,721 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 38 remaining) [2023-08-26 12:45:05,721 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 38 remaining) [2023-08-26 12:45:05,721 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 38 remaining) [2023-08-26 12:45:05,725 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 38 remaining) [2023-08-26 12:45:05,725 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 38 remaining) [2023-08-26 12:45:05,725 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 38 remaining) [2023-08-26 12:45:05,725 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONASSERT (0 of 38 remaining) [2023-08-26 12:45:05,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 12:45:05,726 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2023-08-26 12:45:05,728 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 12:45:05,728 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-26 12:45:05,776 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 12:45:05,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 272 places, 315 transitions, 648 flow [2023-08-26 12:45:05,841 INFO L124 PetriNetUnfolderBase]: 80/522 cut-off events. [2023-08-26 12:45:05,841 INFO L125 PetriNetUnfolderBase]: For 6/8 co-relation queries the response was YES. [2023-08-26 12:45:05,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 536 conditions, 522 events. 80/522 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2395 event pairs, 0 based on Foata normal form. 0/369 useless extension candidates. Maximal degree in co-relation 320. Up to 12 conditions per place. [2023-08-26 12:45:05,846 INFO L82 GeneralOperation]: Start removeDead. Operand has 272 places, 315 transitions, 648 flow [2023-08-26 12:45:05,853 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 272 places, 315 transitions, 648 flow [2023-08-26 12:45:05,854 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:45:05,854 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 272 places, 315 transitions, 648 flow [2023-08-26 12:45:05,854 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 272 places, 315 transitions, 648 flow [2023-08-26 12:45:05,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 272 places, 315 transitions, 648 flow [2023-08-26 12:45:05,916 INFO L124 PetriNetUnfolderBase]: 80/522 cut-off events. [2023-08-26 12:45:05,917 INFO L125 PetriNetUnfolderBase]: For 6/8 co-relation queries the response was YES. [2023-08-26 12:45:05,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 536 conditions, 522 events. 80/522 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2395 event pairs, 0 based on Foata normal form. 0/369 useless extension candidates. Maximal degree in co-relation 320. Up to 12 conditions per place. [2023-08-26 12:45:05,946 INFO L119 LiptonReduction]: Number of co-enabled transitions 48960 [2023-08-26 12:45:10,367 INFO L134 LiptonReduction]: Checked pairs total: 97151 [2023-08-26 12:45:10,367 INFO L136 LiptonReduction]: Total number of compositions: 286 [2023-08-26 12:45:10,369 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:45:10,369 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;@639373a7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:45:10,370 INFO L358 AbstractCegarLoop]: Starting to check reachability of 49 error locations. [2023-08-26 12:45:10,371 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:45:10,371 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2023-08-26 12:45:10,371 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:45:10,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:45:10,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 12:45:10,371 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-26 12:45:10,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:45:10,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1596235, now seen corresponding path program 1 times [2023-08-26 12:45:10,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:45:10,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117174792] [2023-08-26 12:45:10,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:45:10,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:45:10,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:45:10,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:45:10,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:45:10,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117174792] [2023-08-26 12:45:10,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117174792] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:45:10,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:45:10,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:45:10,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085038582] [2023-08-26 12:45:10,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:45:10,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:45:10,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:45:10,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:45:10,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:45:10,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 601 [2023-08-26 12:45:10,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 134 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 259.0) internal successors, (777), 3 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:10,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:45:10,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 601 [2023-08-26 12:45:10,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:45:13,601 INFO L124 PetriNetUnfolderBase]: 22825/38051 cut-off events. [2023-08-26 12:45:13,601 INFO L125 PetriNetUnfolderBase]: For 132/132 co-relation queries the response was YES. [2023-08-26 12:45:13,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71674 conditions, 38051 events. 22825/38051 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 1558. Compared 320903 event pairs, 21546 based on Foata normal form. 3152/29199 useless extension candidates. Maximal degree in co-relation 30523. Up to 33499 conditions per place. [2023-08-26 12:45:13,828 INFO L140 encePairwiseOnDemand]: 559/601 looper letters, 72 selfloop transitions, 2 changer transitions 0/96 dead transitions. [2023-08-26 12:45:13,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 96 transitions, 358 flow [2023-08-26 12:45:13,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:45:13,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:45:13,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 888 transitions. [2023-08-26 12:45:13,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4925124792013311 [2023-08-26 12:45:13,831 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 888 transitions. [2023-08-26 12:45:13,831 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 888 transitions. [2023-08-26 12:45:13,832 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:45:13,832 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 888 transitions. [2023-08-26 12:45:13,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 296.0) internal successors, (888), 3 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:13,836 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 601.0) internal successors, (2404), 4 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:13,837 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 601.0) internal successors, (2404), 4 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:13,837 INFO L175 Difference]: Start difference. First operand has 102 places, 134 transitions, 286 flow. Second operand 3 states and 888 transitions. [2023-08-26 12:45:13,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 96 transitions, 358 flow [2023-08-26 12:45:13,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 96 transitions, 358 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:45:13,840 INFO L231 Difference]: Finished difference. Result has 97 places, 96 transitions, 220 flow [2023-08-26 12:45:13,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=97, PETRI_TRANSITIONS=96} [2023-08-26 12:45:13,841 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -5 predicate places. [2023-08-26 12:45:13,841 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 96 transitions, 220 flow [2023-08-26 12:45:13,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 259.0) internal successors, (777), 3 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:13,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:45:13,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 12:45:13,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 12:45:13,842 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-26 12:45:13,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:45:13,843 INFO L85 PathProgramCache]: Analyzing trace with hash 49446347, now seen corresponding path program 1 times [2023-08-26 12:45:13,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:45:13,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274434340] [2023-08-26 12:45:13,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:45:13,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:45:13,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:45:13,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:45:13,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:45:13,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274434340] [2023-08-26 12:45:13,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274434340] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:45:13,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087124339] [2023-08-26 12:45:13,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:45:13,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:45:13,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:45:13,869 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 12:45:13,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-26 12:45:13,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:45:13,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-26 12:45:13,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:45:13,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:45:13,941 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:45:13,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:45:13,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087124339] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:45:13,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:45:13,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-08-26 12:45:13,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095841845] [2023-08-26 12:45:13,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:45:13,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 12:45:13,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:45:13,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 12:45:13,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-08-26 12:45:13,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 601 [2023-08-26 12:45:13,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 96 transitions, 220 flow. Second operand has 6 states, 6 states have (on average 259.1666666666667) internal successors, (1555), 6 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:13,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:45:13,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 601 [2023-08-26 12:45:13,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:45:16,514 INFO L124 PetriNetUnfolderBase]: 22825/38054 cut-off events. [2023-08-26 12:45:16,516 INFO L125 PetriNetUnfolderBase]: For 132/132 co-relation queries the response was YES. [2023-08-26 12:45:16,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71690 conditions, 38054 events. 22825/38054 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 1557. Compared 320765 event pairs, 21546 based on Foata normal form. 0/26050 useless extension candidates. Maximal degree in co-relation 71677. Up to 33499 conditions per place. [2023-08-26 12:45:16,715 INFO L140 encePairwiseOnDemand]: 598/601 looper letters, 72 selfloop transitions, 5 changer transitions 0/99 dead transitions. [2023-08-26 12:45:16,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 99 transitions, 386 flow [2023-08-26 12:45:16,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 12:45:16,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 12:45:16,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1628 transitions. [2023-08-26 12:45:16,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4514697726012202 [2023-08-26 12:45:16,720 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1628 transitions. [2023-08-26 12:45:16,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1628 transitions. [2023-08-26 12:45:16,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:45:16,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1628 transitions. [2023-08-26 12:45:16,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 271.3333333333333) internal successors, (1628), 6 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:16,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 601.0) internal successors, (4207), 7 states have internal predecessors, (4207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:16,730 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 601.0) internal successors, (4207), 7 states have internal predecessors, (4207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:16,730 INFO L175 Difference]: Start difference. First operand has 97 places, 96 transitions, 220 flow. Second operand 6 states and 1628 transitions. [2023-08-26 12:45:16,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 99 transitions, 386 flow [2023-08-26 12:45:16,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 99 transitions, 382 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-26 12:45:16,732 INFO L231 Difference]: Finished difference. Result has 104 places, 99 transitions, 252 flow [2023-08-26 12:45:16,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=252, PETRI_PLACES=104, PETRI_TRANSITIONS=99} [2023-08-26 12:45:16,735 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 2 predicate places. [2023-08-26 12:45:16,735 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 99 transitions, 252 flow [2023-08-26 12:45:16,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 259.1666666666667) internal successors, (1555), 6 states have internal predecessors, (1555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:16,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:45:16,736 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-26 12:45:16,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-26 12:45:16,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:45:16,942 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-26 12:45:16,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:45:16,942 INFO L85 PathProgramCache]: Analyzing trace with hash -154338485, now seen corresponding path program 2 times [2023-08-26 12:45:16,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:45:16,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492714323] [2023-08-26 12:45:16,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:45:16,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:45:16,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:45:16,996 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:45:16,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:45:16,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492714323] [2023-08-26 12:45:16,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492714323] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:45:16,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226815276] [2023-08-26 12:45:16,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 12:45:16,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:45:16,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:45:16,998 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 12:45:17,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-26 12:45:17,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-26 12:45:17,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 12:45:17,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-26 12:45:17,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:45:17,078 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-26 12:45:17,089 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-26 12:45:17,089 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 12:45:17,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226815276] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:45:17,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 12:45:17,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2023-08-26 12:45:17,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858198673] [2023-08-26 12:45:17,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:45:17,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:45:17,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:45:17,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:45:17,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-08-26 12:45:17,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 601 [2023-08-26 12:45:17,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 99 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 217.33333333333334) internal successors, (652), 3 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:17,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:45:17,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 601 [2023-08-26 12:45:17,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:45:19,667 INFO L124 PetriNetUnfolderBase]: 24498/40388 cut-off events. [2023-08-26 12:45:19,667 INFO L125 PetriNetUnfolderBase]: For 103/103 co-relation queries the response was YES. [2023-08-26 12:45:19,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76998 conditions, 40388 events. 24498/40388 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 1595. Compared 335330 event pairs, 11286 based on Foata normal form. 0/28212 useless extension candidates. Maximal degree in co-relation 76963. Up to 36410 conditions per place. [2023-08-26 12:45:19,838 INFO L140 encePairwiseOnDemand]: 597/601 looper letters, 100 selfloop transitions, 2 changer transitions 0/122 dead transitions. [2023-08-26 12:45:19,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 122 transitions, 502 flow [2023-08-26 12:45:19,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:45:19,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:45:19,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 748 transitions. [2023-08-26 12:45:19,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41486411536328344 [2023-08-26 12:45:19,840 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 748 transitions. [2023-08-26 12:45:19,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 748 transitions. [2023-08-26 12:45:19,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:45:19,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 748 transitions. [2023-08-26 12:45:19,842 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 249.33333333333334) internal successors, (748), 3 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:19,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 601.0) internal successors, (2404), 4 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:19,845 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 601.0) internal successors, (2404), 4 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:19,846 INFO L175 Difference]: Start difference. First operand has 104 places, 99 transitions, 252 flow. Second operand 3 states and 748 transitions. [2023-08-26 12:45:19,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 122 transitions, 502 flow [2023-08-26 12:45:19,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 122 transitions, 488 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-26 12:45:19,848 INFO L231 Difference]: Finished difference. Result has 106 places, 100 transitions, 252 flow [2023-08-26 12:45:19,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=252, PETRI_PLACES=106, PETRI_TRANSITIONS=100} [2023-08-26 12:45:19,849 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 4 predicate places. [2023-08-26 12:45:19,849 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 100 transitions, 252 flow [2023-08-26 12:45:19,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.33333333333334) internal successors, (652), 3 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:19,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:45:19,849 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2023-08-26 12:45:19,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-26 12:45:20,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-26 12:45:20,054 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-26 12:45:20,054 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:45:20,055 INFO L85 PathProgramCache]: Analyzing trace with hash -154338487, now seen corresponding path program 1 times [2023-08-26 12:45:20,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:45:20,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695614821] [2023-08-26 12:45:20,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:45:20,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:45:20,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:45:20,089 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-26 12:45:20,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:45:20,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695614821] [2023-08-26 12:45:20,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695614821] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:45:20,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:45:20,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:45:20,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384961469] [2023-08-26 12:45:20,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:45:20,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:45:20,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:45:20,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:45:20,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:45:20,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 221 out of 601 [2023-08-26 12:45:20,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 100 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:20,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:45:20,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 221 of 601 [2023-08-26 12:45:20,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:45:23,299 INFO L124 PetriNetUnfolderBase]: 32924/50770 cut-off events. [2023-08-26 12:45:23,299 INFO L125 PetriNetUnfolderBase]: For 1417/1417 co-relation queries the response was YES. [2023-08-26 12:45:23,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101161 conditions, 50770 events. 32924/50770 cut-off events. For 1417/1417 co-relation queries the response was YES. Maximal size of possible extension queue 1886. Compared 393093 event pairs, 30067 based on Foata normal form. 0/32002 useless extension candidates. Maximal degree in co-relation 101131. Up to 46470 conditions per place. [2023-08-26 12:45:23,565 INFO L140 encePairwiseOnDemand]: 597/601 looper letters, 131 selfloop transitions, 2 changer transitions 0/145 dead transitions. [2023-08-26 12:45:23,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 145 transitions, 608 flow [2023-08-26 12:45:23,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:45:23,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:45:23,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 793 transitions. [2023-08-26 12:45:23,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43982251802551303 [2023-08-26 12:45:23,568 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 793 transitions. [2023-08-26 12:45:23,568 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 793 transitions. [2023-08-26 12:45:23,569 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:45:23,569 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 793 transitions. [2023-08-26 12:45:23,571 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 264.3333333333333) internal successors, (793), 3 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:23,578 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 601.0) internal successors, (2404), 4 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:23,579 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 601.0) internal successors, (2404), 4 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:23,579 INFO L175 Difference]: Start difference. First operand has 106 places, 100 transitions, 252 flow. Second operand 3 states and 793 transitions. [2023-08-26 12:45:23,579 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 145 transitions, 608 flow [2023-08-26 12:45:23,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 145 transitions, 606 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:45:23,584 INFO L231 Difference]: Finished difference. Result has 105 places, 98 transitions, 250 flow [2023-08-26 12:45:23,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=250, PETRI_PLACES=105, PETRI_TRANSITIONS=98} [2023-08-26 12:45:23,585 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 3 predicate places. [2023-08-26 12:45:23,586 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 98 transitions, 250 flow [2023-08-26 12:45:23,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 222.33333333333334) internal successors, (667), 3 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:23,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:45:23,598 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:45:23,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 12:45:23,599 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-26 12:45:23,599 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:45:23,599 INFO L85 PathProgramCache]: Analyzing trace with hash -2008252095, now seen corresponding path program 1 times [2023-08-26 12:45:23,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:45:23,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509060203] [2023-08-26 12:45:23,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:45:23,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:45:23,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:45:23,681 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:45:23,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:45:23,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509060203] [2023-08-26 12:45:23,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509060203] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:45:23,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525085988] [2023-08-26 12:45:23,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:45:23,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:45:23,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:45:23,683 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 12:45:23,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-26 12:45:23,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:45:23,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 12:45:23,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:45:23,787 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:45:23,787 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:45:23,836 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:45:23,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525085988] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:45:23,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:45:23,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-08-26 12:45:23,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289177643] [2023-08-26 12:45:23,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:45:23,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-08-26 12:45:23,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:45:23,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-08-26 12:45:23,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2023-08-26 12:45:23,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 601 [2023-08-26 12:45:23,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 98 transitions, 250 flow. Second operand has 12 states, 12 states have (on average 259.4166666666667) internal successors, (3113), 12 states have internal predecessors, (3113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:23,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:45:23,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 601 [2023-08-26 12:45:23,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:45:26,086 INFO L124 PetriNetUnfolderBase]: 21275/34941 cut-off events. [2023-08-26 12:45:26,087 INFO L125 PetriNetUnfolderBase]: For 1244/1244 co-relation queries the response was YES. [2023-08-26 12:45:26,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67847 conditions, 34941 events. 21275/34941 cut-off events. For 1244/1244 co-relation queries the response was YES. Maximal size of possible extension queue 1470. Compared 287533 event pairs, 19969 based on Foata normal form. 6/25299 useless extension candidates. Maximal degree in co-relation 67793. Up to 31040 conditions per place. [2023-08-26 12:45:26,273 INFO L140 encePairwiseOnDemand]: 598/601 looper letters, 71 selfloop transitions, 11 changer transitions 0/104 dead transitions. [2023-08-26 12:45:26,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 104 transitions, 450 flow [2023-08-26 12:45:26,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 12:45:26,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 12:45:26,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3183 transitions. [2023-08-26 12:45:26,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4413477537437604 [2023-08-26 12:45:26,282 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3183 transitions. [2023-08-26 12:45:26,282 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3183 transitions. [2023-08-26 12:45:26,284 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:45:26,284 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3183 transitions. [2023-08-26 12:45:26,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 265.25) internal successors, (3183), 12 states have internal predecessors, (3183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:26,298 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 601.0) internal successors, (7813), 13 states have internal predecessors, (7813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:26,300 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 601.0) internal successors, (7813), 13 states have internal predecessors, (7813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:26,300 INFO L175 Difference]: Start difference. First operand has 105 places, 98 transitions, 250 flow. Second operand 12 states and 3183 transitions. [2023-08-26 12:45:26,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 104 transitions, 450 flow [2023-08-26 12:45:26,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 104 transitions, 446 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:45:26,328 INFO L231 Difference]: Finished difference. Result has 120 places, 104 transitions, 330 flow [2023-08-26 12:45:26,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=330, PETRI_PLACES=120, PETRI_TRANSITIONS=104} [2023-08-26 12:45:26,328 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 18 predicate places. [2023-08-26 12:45:26,329 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 104 transitions, 330 flow [2023-08-26 12:45:26,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 259.4166666666667) internal successors, (3113), 12 states have internal predecessors, (3113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:26,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:45:26,330 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:45:26,336 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-26 12:45:26,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:45:26,533 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-26 12:45:26,534 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:45:26,534 INFO L85 PathProgramCache]: Analyzing trace with hash -676499135, now seen corresponding path program 2 times [2023-08-26 12:45:26,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:45:26,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696012290] [2023-08-26 12:45:26,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:45:26,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:45:26,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:45:26,718 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 12:45:26,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:45:26,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696012290] [2023-08-26 12:45:26,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696012290] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:45:26,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:45:26,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:45:26,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540721194] [2023-08-26 12:45:26,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:45:26,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 12:45:26,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:45:26,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 12:45:26,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 12:45:26,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 601 [2023-08-26 12:45:26,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 104 transitions, 330 flow. Second operand has 5 states, 5 states have (on average 198.6) internal successors, (993), 5 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:26,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:45:26,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 601 [2023-08-26 12:45:26,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:45:28,925 INFO L124 PetriNetUnfolderBase]: 15767/24492 cut-off events. [2023-08-26 12:45:28,926 INFO L125 PetriNetUnfolderBase]: For 786/786 co-relation queries the response was YES. [2023-08-26 12:45:29,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49197 conditions, 24492 events. 15767/24492 cut-off events. For 786/786 co-relation queries the response was YES. Maximal size of possible extension queue 898. Compared 173927 event pairs, 5936 based on Foata normal form. 0/19519 useless extension candidates. Maximal degree in co-relation 49119. Up to 21241 conditions per place. [2023-08-26 12:45:29,075 INFO L140 encePairwiseOnDemand]: 582/601 looper letters, 183 selfloop transitions, 5 changer transitions 0/200 dead transitions. [2023-08-26 12:45:29,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 200 transitions, 914 flow [2023-08-26 12:45:29,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 12:45:29,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 12:45:29,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1385 transitions. [2023-08-26 12:45:29,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3840820854132002 [2023-08-26 12:45:29,079 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1385 transitions. [2023-08-26 12:45:29,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1385 transitions. [2023-08-26 12:45:29,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:45:29,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1385 transitions. [2023-08-26 12:45:29,082 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 230.83333333333334) internal successors, (1385), 6 states have internal predecessors, (1385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:29,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 601.0) internal successors, (4207), 7 states have internal predecessors, (4207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:29,087 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 601.0) internal successors, (4207), 7 states have internal predecessors, (4207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:29,087 INFO L175 Difference]: Start difference. First operand has 120 places, 104 transitions, 330 flow. Second operand 6 states and 1385 transitions. [2023-08-26 12:45:29,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 200 transitions, 914 flow [2023-08-26 12:45:29,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 200 transitions, 866 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-26 12:45:29,092 INFO L231 Difference]: Finished difference. Result has 116 places, 100 transitions, 319 flow [2023-08-26 12:45:29,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=319, PETRI_PLACES=116, PETRI_TRANSITIONS=100} [2023-08-26 12:45:29,093 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 14 predicate places. [2023-08-26 12:45:29,093 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 100 transitions, 319 flow [2023-08-26 12:45:29,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 198.6) internal successors, (993), 5 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:29,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:45:29,094 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:45:29,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 12:45:29,094 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-26 12:45:29,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:45:29,094 INFO L85 PathProgramCache]: Analyzing trace with hash -677067732, now seen corresponding path program 1 times [2023-08-26 12:45:29,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:45:29,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087129796] [2023-08-26 12:45:29,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:45:29,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:45:29,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:45:29,219 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 12:45:29,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:45:29,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087129796] [2023-08-26 12:45:29,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087129796] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:45:29,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261262023] [2023-08-26 12:45:29,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:45:29,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:45:29,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:45:29,221 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 12:45:29,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-26 12:45:29,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:45:29,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 12:45:29,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:45:29,311 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-08-26 12:45:29,343 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 12:45:29,343 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:45:29,388 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 12:45:29,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261262023] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:45:29,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:45:29,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2023-08-26 12:45:29,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328190728] [2023-08-26 12:45:29,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:45:29,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 12:45:29,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:45:29,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 12:45:29,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-26 12:45:29,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 216 out of 601 [2023-08-26 12:45:29,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 100 transitions, 319 flow. Second operand has 8 states, 8 states have (on average 218.125) internal successors, (1745), 8 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:29,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:45:29,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 216 of 601 [2023-08-26 12:45:29,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:45:29,888 INFO L124 PetriNetUnfolderBase]: 1575/2984 cut-off events. [2023-08-26 12:45:29,888 INFO L125 PetriNetUnfolderBase]: For 914/914 co-relation queries the response was YES. [2023-08-26 12:45:29,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6777 conditions, 2984 events. 1575/2984 cut-off events. For 914/914 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 19172 event pairs, 0 based on Foata normal form. 340/3000 useless extension candidates. Maximal degree in co-relation 6720. Up to 1866 conditions per place. [2023-08-26 12:45:29,898 INFO L140 encePairwiseOnDemand]: 597/601 looper letters, 101 selfloop transitions, 3 changer transitions 0/111 dead transitions. [2023-08-26 12:45:29,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 111 transitions, 509 flow [2023-08-26 12:45:29,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 12:45:29,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 12:45:29,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1178 transitions. [2023-08-26 12:45:29,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3920133111480865 [2023-08-26 12:45:29,901 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1178 transitions. [2023-08-26 12:45:29,901 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1178 transitions. [2023-08-26 12:45:29,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:45:29,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1178 transitions. [2023-08-26 12:45:29,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 235.6) internal successors, (1178), 5 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:29,907 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 601.0) internal successors, (3606), 6 states have internal predecessors, (3606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:29,908 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 601.0) internal successors, (3606), 6 states have internal predecessors, (3606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:29,908 INFO L175 Difference]: Start difference. First operand has 116 places, 100 transitions, 319 flow. Second operand 5 states and 1178 transitions. [2023-08-26 12:45:29,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 111 transitions, 509 flow [2023-08-26 12:45:29,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 111 transitions, 495 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-26 12:45:29,912 INFO L231 Difference]: Finished difference. Result has 78 places, 59 transitions, 187 flow [2023-08-26 12:45:29,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=187, PETRI_PLACES=78, PETRI_TRANSITIONS=59} [2023-08-26 12:45:29,912 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -24 predicate places. [2023-08-26 12:45:29,912 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 59 transitions, 187 flow [2023-08-26 12:45:29,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 218.125) internal successors, (1745), 8 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:29,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:45:29,913 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:45:29,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-26 12:45:30,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:45:30,118 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr10ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-26 12:45:30,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:45:30,119 INFO L85 PathProgramCache]: Analyzing trace with hash 503362591, now seen corresponding path program 1 times [2023-08-26 12:45:30,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:45:30,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870609823] [2023-08-26 12:45:30,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:45:30,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:45:30,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:45:30,365 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 12:45:30,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:45:30,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870609823] [2023-08-26 12:45:30,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870609823] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:45:30,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:45:30,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 12:45:30,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425205225] [2023-08-26 12:45:30,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:45:30,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 12:45:30,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:45:30,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 12:45:30,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-08-26 12:45:30,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 601 [2023-08-26 12:45:30,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 59 transitions, 187 flow. Second operand has 6 states, 6 states have (on average 189.5) internal successors, (1137), 6 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:30,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:45:30,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 601 [2023-08-26 12:45:30,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:45:30,651 INFO L124 PetriNetUnfolderBase]: 1687/2922 cut-off events. [2023-08-26 12:45:30,651 INFO L125 PetriNetUnfolderBase]: For 1205/1205 co-relation queries the response was YES. [2023-08-26 12:45:30,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6574 conditions, 2922 events. 1687/2922 cut-off events. For 1205/1205 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 17114 event pairs, 659 based on Foata normal form. 0/2648 useless extension candidates. Maximal degree in co-relation 6520. Up to 1727 conditions per place. [2023-08-26 12:45:30,664 INFO L140 encePairwiseOnDemand]: 592/601 looper letters, 81 selfloop transitions, 7 changer transitions 0/95 dead transitions. [2023-08-26 12:45:30,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 95 transitions, 453 flow [2023-08-26 12:45:30,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 12:45:30,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 12:45:30,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1018 transitions. [2023-08-26 12:45:30,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33876871880199666 [2023-08-26 12:45:30,668 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1018 transitions. [2023-08-26 12:45:30,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1018 transitions. [2023-08-26 12:45:30,669 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:45:30,669 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1018 transitions. [2023-08-26 12:45:30,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 203.6) internal successors, (1018), 5 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:30,674 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 601.0) internal successors, (3606), 6 states have internal predecessors, (3606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:30,674 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 601.0) internal successors, (3606), 6 states have internal predecessors, (3606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:30,674 INFO L175 Difference]: Start difference. First operand has 78 places, 59 transitions, 187 flow. Second operand 5 states and 1018 transitions. [2023-08-26 12:45:30,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 95 transitions, 453 flow [2023-08-26 12:45:30,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 95 transitions, 440 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-26 12:45:30,678 INFO L231 Difference]: Finished difference. Result has 82 places, 64 transitions, 230 flow [2023-08-26 12:45:30,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=230, PETRI_PLACES=82, PETRI_TRANSITIONS=64} [2023-08-26 12:45:30,678 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -20 predicate places. [2023-08-26 12:45:30,678 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 64 transitions, 230 flow [2023-08-26 12:45:30,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 189.5) internal successors, (1137), 6 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:30,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:45:30,679 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:45:30,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-26 12:45:30,679 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-26 12:45:30,679 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:45:30,679 INFO L85 PathProgramCache]: Analyzing trace with hash 878929922, now seen corresponding path program 1 times [2023-08-26 12:45:30,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:45:30,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407215487] [2023-08-26 12:45:30,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:45:30,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:45:30,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:45:30,848 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-08-26 12:45:30,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:45:30,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407215487] [2023-08-26 12:45:30,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407215487] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:45:30,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:45:30,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:45:30,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925495115] [2023-08-26 12:45:30,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:45:30,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 12:45:30,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:45:30,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 12:45:30,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 12:45:30,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 197 out of 601 [2023-08-26 12:45:30,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 64 transitions, 230 flow. Second operand has 5 states, 5 states have (on average 199.0) internal successors, (995), 5 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:30,852 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:45:30,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 197 of 601 [2023-08-26 12:45:30,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:45:31,101 INFO L124 PetriNetUnfolderBase]: 1428/2534 cut-off events. [2023-08-26 12:45:31,101 INFO L125 PetriNetUnfolderBase]: For 1003/1003 co-relation queries the response was YES. [2023-08-26 12:45:31,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6026 conditions, 2534 events. 1428/2534 cut-off events. For 1003/1003 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 14823 event pairs, 143 based on Foata normal form. 51/2482 useless extension candidates. Maximal degree in co-relation 5969. Up to 2154 conditions per place. [2023-08-26 12:45:31,114 INFO L140 encePairwiseOnDemand]: 596/601 looper letters, 69 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2023-08-26 12:45:31,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 78 transitions, 411 flow [2023-08-26 12:45:31,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:45:31,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:45:31,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 846 transitions. [2023-08-26 12:45:31,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3519134775374376 [2023-08-26 12:45:31,117 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 846 transitions. [2023-08-26 12:45:31,117 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 846 transitions. [2023-08-26 12:45:31,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:45:31,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 846 transitions. [2023-08-26 12:45:31,119 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 211.5) internal successors, (846), 4 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:31,121 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 601.0) internal successors, (3005), 5 states have internal predecessors, (3005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:31,122 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 601.0) internal successors, (3005), 5 states have internal predecessors, (3005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:31,122 INFO L175 Difference]: Start difference. First operand has 82 places, 64 transitions, 230 flow. Second operand 4 states and 846 transitions. [2023-08-26 12:45:31,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 78 transitions, 411 flow [2023-08-26 12:45:31,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 78 transitions, 409 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:45:31,126 INFO L231 Difference]: Finished difference. Result has 81 places, 61 transitions, 226 flow [2023-08-26 12:45:31,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=601, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=226, PETRI_PLACES=81, PETRI_TRANSITIONS=61} [2023-08-26 12:45:31,126 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -21 predicate places. [2023-08-26 12:45:31,126 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 61 transitions, 226 flow [2023-08-26 12:45:31,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 199.0) internal successors, (995), 5 states have internal predecessors, (995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:31,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:45:31,127 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2023-08-26 12:45:31,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-26 12:45:31,127 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 46 more)] === [2023-08-26 12:45:31,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:45:31,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1459382654, now seen corresponding path program 1 times [2023-08-26 12:45:31,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:45:31,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129400323] [2023-08-26 12:45:31,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:45:31,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:45:31,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:45:31,145 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 12:45:31,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:45:31,163 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 12:45:31,164 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 12:45:31,164 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (48 of 49 remaining) [2023-08-26 12:45:31,164 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 49 remaining) [2023-08-26 12:45:31,164 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 49 remaining) [2023-08-26 12:45:31,164 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 49 remaining) [2023-08-26 12:45:31,164 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 49 remaining) [2023-08-26 12:45:31,164 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 49 remaining) [2023-08-26 12:45:31,164 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 49 remaining) [2023-08-26 12:45:31,165 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 49 remaining) [2023-08-26 12:45:31,165 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 49 remaining) [2023-08-26 12:45:31,165 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 49 remaining) [2023-08-26 12:45:31,165 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 49 remaining) [2023-08-26 12:45:31,165 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 49 remaining) [2023-08-26 12:45:31,165 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 49 remaining) [2023-08-26 12:45:31,165 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 49 remaining) [2023-08-26 12:45:31,165 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 49 remaining) [2023-08-26 12:45:31,165 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONASSERT (33 of 49 remaining) [2023-08-26 12:45:31,165 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 49 remaining) [2023-08-26 12:45:31,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 49 remaining) [2023-08-26 12:45:31,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 49 remaining) [2023-08-26 12:45:31,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 49 remaining) [2023-08-26 12:45:31,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 49 remaining) [2023-08-26 12:45:31,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 49 remaining) [2023-08-26 12:45:31,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 49 remaining) [2023-08-26 12:45:31,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 49 remaining) [2023-08-26 12:45:31,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 49 remaining) [2023-08-26 12:45:31,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 49 remaining) [2023-08-26 12:45:31,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONASSERT (22 of 49 remaining) [2023-08-26 12:45:31,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 49 remaining) [2023-08-26 12:45:31,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 49 remaining) [2023-08-26 12:45:31,167 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 49 remaining) [2023-08-26 12:45:31,167 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 49 remaining) [2023-08-26 12:45:31,167 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 49 remaining) [2023-08-26 12:45:31,167 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 49 remaining) [2023-08-26 12:45:31,167 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 49 remaining) [2023-08-26 12:45:31,167 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 49 remaining) [2023-08-26 12:45:31,167 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 49 remaining) [2023-08-26 12:45:31,167 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 49 remaining) [2023-08-26 12:45:31,167 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONASSERT (11 of 49 remaining) [2023-08-26 12:45:31,167 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 49 remaining) [2023-08-26 12:45:31,167 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 49 remaining) [2023-08-26 12:45:31,168 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 49 remaining) [2023-08-26 12:45:31,168 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 49 remaining) [2023-08-26 12:45:31,168 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 49 remaining) [2023-08-26 12:45:31,168 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 49 remaining) [2023-08-26 12:45:31,168 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 49 remaining) [2023-08-26 12:45:31,168 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 49 remaining) [2023-08-26 12:45:31,168 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 49 remaining) [2023-08-26 12:45:31,168 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 49 remaining) [2023-08-26 12:45:31,169 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONASSERT (0 of 49 remaining) [2023-08-26 12:45:31,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-26 12:45:31,170 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-26 12:45:31,170 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 12:45:31,170 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-26 12:45:31,221 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-26 12:45:31,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 346 places, 402 transitions, 834 flow [2023-08-26 12:45:31,316 INFO L124 PetriNetUnfolderBase]: 117/763 cut-off events. [2023-08-26 12:45:31,317 INFO L125 PetriNetUnfolderBase]: For 19/22 co-relation queries the response was YES. [2023-08-26 12:45:31,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 791 conditions, 763 events. 117/763 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 3821 event pairs, 1 based on Foata normal form. 0/541 useless extension candidates. Maximal degree in co-relation 530. Up to 16 conditions per place. [2023-08-26 12:45:31,328 INFO L82 GeneralOperation]: Start removeDead. Operand has 346 places, 402 transitions, 834 flow [2023-08-26 12:45:31,338 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 346 places, 402 transitions, 834 flow [2023-08-26 12:45:31,338 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:45:31,338 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 346 places, 402 transitions, 834 flow [2023-08-26 12:45:31,338 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 346 places, 402 transitions, 834 flow [2023-08-26 12:45:31,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 346 places, 402 transitions, 834 flow [2023-08-26 12:45:31,432 INFO L124 PetriNetUnfolderBase]: 117/763 cut-off events. [2023-08-26 12:45:31,432 INFO L125 PetriNetUnfolderBase]: For 19/22 co-relation queries the response was YES. [2023-08-26 12:45:31,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 791 conditions, 763 events. 117/763 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 3821 event pairs, 1 based on Foata normal form. 0/541 useless extension candidates. Maximal degree in co-relation 530. Up to 16 conditions per place. [2023-08-26 12:45:31,478 INFO L119 LiptonReduction]: Number of co-enabled transitions 95880 [2023-08-26 12:45:36,551 INFO L134 LiptonReduction]: Checked pairs total: 194644 [2023-08-26 12:45:36,551 INFO L136 LiptonReduction]: Total number of compositions: 376 [2023-08-26 12:45:36,553 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:45:36,553 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;@639373a7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:45:36,553 INFO L358 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2023-08-26 12:45:36,554 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:45:36,554 INFO L124 PetriNetUnfolderBase]: 1/3 cut-off events. [2023-08-26 12:45:36,554 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:45:36,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:45:36,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-08-26 12:45:36,554 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-26 12:45:36,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:45:36,555 INFO L85 PathProgramCache]: Analyzing trace with hash 2454903, now seen corresponding path program 1 times [2023-08-26 12:45:36,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:45:36,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782234003] [2023-08-26 12:45:36,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:45:36,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:45:36,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:45:36,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:45:36,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:45:36,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782234003] [2023-08-26 12:45:36,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782234003] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:45:36,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:45:36,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:45:36,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779328403] [2023-08-26 12:45:36,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:45:36,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:45:36,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:45:36,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:45:36,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:45:36,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 329 out of 778 [2023-08-26 12:45:36,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 174 transitions, 378 flow. Second operand has 3 states, 3 states have (on average 330.0) internal successors, (990), 3 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:45:36,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:45:36,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 329 of 778 [2023-08-26 12:45:36,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:46:53,001 INFO L124 PetriNetUnfolderBase]: 758121/1080698 cut-off events. [2023-08-26 12:46:53,001 INFO L125 PetriNetUnfolderBase]: For 5917/5917 co-relation queries the response was YES. [2023-08-26 12:46:55,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2080011 conditions, 1080698 events. 758121/1080698 cut-off events. For 5917/5917 co-relation queries the response was YES. Maximal size of possible extension queue 34160. Compared 10249363 event pairs, 730010 based on Foata normal form. 93714/790932 useless extension candidates. Maximal degree in co-relation 243365. Up to 995663 conditions per place. [2023-08-26 12:47:01,590 INFO L140 encePairwiseOnDemand]: 724/778 looper letters, 95 selfloop transitions, 2 changer transitions 0/124 dead transitions. [2023-08-26 12:47:01,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 124 transitions, 472 flow [2023-08-26 12:47:01,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:47:01,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:47:01,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1136 transitions. [2023-08-26 12:47:01,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48671808054841476 [2023-08-26 12:47:01,614 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1136 transitions. [2023-08-26 12:47:01,614 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1136 transitions. [2023-08-26 12:47:01,614 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:47:01,615 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1136 transitions. [2023-08-26 12:47:01,618 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 378.6666666666667) internal successors, (1136), 3 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:47:01,625 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 778.0) internal successors, (3112), 4 states have internal predecessors, (3112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:47:01,626 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 778.0) internal successors, (3112), 4 states have internal predecessors, (3112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:47:01,626 INFO L175 Difference]: Start difference. First operand has 132 places, 174 transitions, 378 flow. Second operand 3 states and 1136 transitions. [2023-08-26 12:47:01,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 124 transitions, 472 flow [2023-08-26 12:47:01,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 124 transitions, 472 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:47:01,631 INFO L231 Difference]: Finished difference. Result has 125 places, 124 transitions, 288 flow [2023-08-26 12:47:01,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=778, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=288, PETRI_PLACES=125, PETRI_TRANSITIONS=124} [2023-08-26 12:47:01,631 INFO L281 CegarLoopForPetriNet]: 132 programPoint places, -7 predicate places. [2023-08-26 12:47:01,631 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 124 transitions, 288 flow [2023-08-26 12:47:01,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 330.0) internal successors, (990), 3 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:47:01,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:47:01,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 12:47:01,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-26 12:47:01,632 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2023-08-26 12:47:01,632 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:47:01,632 INFO L85 PathProgramCache]: Analyzing trace with hash 76079997, now seen corresponding path program 1 times [2023-08-26 12:47:01,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:47:01,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757753270] [2023-08-26 12:47:01,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:47:01,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:47:01,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:47:01,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:47:01,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:47:01,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757753270] [2023-08-26 12:47:01,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757753270] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:47:01,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811152171] [2023-08-26 12:47:01,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:47:01,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:47:01,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:47:01,711 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 12:47:01,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-26 12:47:01,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:47:01,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-26 12:47:01,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:47:01,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:47:01,882 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:47:01,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 12:47:01,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811152171] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:47:01,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:47:01,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-26 12:47:01,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632591051] [2023-08-26 12:47:01,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:47:01,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 12:47:01,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:47:01,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 12:47:01,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-26 12:47:01,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 329 out of 778 [2023-08-26 12:47:01,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 124 transitions, 288 flow. Second operand has 7 states, 7 states have (on average 330.2857142857143) internal successors, (2312), 7 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:47:01,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:47:01,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 329 of 778 [2023-08-26 12:47:01,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand