/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_60-invariant_racefree.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 12:40:53,416 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 12:40:53,503 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 12:40:53,508 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 12:40:53,509 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 12:40:53,541 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 12:40:53,542 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 12:40:53,542 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 12:40:53,543 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 12:40:53,547 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 12:40:53,547 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 12:40:53,547 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 12:40:53,548 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 12:40:53,549 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 12:40:53,549 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 12:40:53,549 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 12:40:53,550 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 12:40:53,550 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 12:40:53,550 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 12:40:53,550 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 12:40:53,551 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 12:40:53,551 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 12:40:53,551 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 12:40:53,552 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 12:40:53,552 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 12:40:53,552 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 12:40:53,553 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 12:40:53,553 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:40:53,553 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 12:40:53,553 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 12:40:53,554 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 12:40:53,555 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 12:40:53,555 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 12:40:53,555 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 12:40:53,555 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 12:40:53,555 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 12:40:53,904 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 12:40:53,922 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 12:40:53,924 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 12:40:53,925 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 12:40:53,925 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 12:40:53,927 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/28-race_reach_60-invariant_racefree.i [2023-08-26 12:40:55,104 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 12:40:55,434 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 12:40:55,435 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/28-race_reach_60-invariant_racefree.i [2023-08-26 12:40:55,458 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2bfe688d/7f8e8f2cbe914575a412dae93f962b41/FLAG8204f5e0b [2023-08-26 12:40:55,473 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2bfe688d/7f8e8f2cbe914575a412dae93f962b41 [2023-08-26 12:40:55,477 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 12:40:55,479 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 12:40:55,479 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 12:40:55,480 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 12:40:55,482 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 12:40:55,482 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:40:55" (1/1) ... [2023-08-26 12:40:55,483 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ee23e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:40:55, skipping insertion in model container [2023-08-26 12:40:55,483 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:40:55" (1/1) ... [2023-08-26 12:40:55,538 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 12:40:55,901 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:40:55,920 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 12:40:55,952 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 12:40:55,953 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [244] [2023-08-26 12:40:55,984 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:40:56,028 INFO L206 MainTranslator]: Completed translation [2023-08-26 12:40:56,028 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:40:56 WrapperNode [2023-08-26 12:40:56,029 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 12:40:56,030 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 12:40:56,030 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 12:40:56,030 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 12:40:56,036 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:40:56" (1/1) ... [2023-08-26 12:40:56,064 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:40:56" (1/1) ... [2023-08-26 12:40:56,085 INFO L138 Inliner]: procedures = 170, calls = 35, calls flagged for inlining = 5, calls inlined = 6, statements flattened = 149 [2023-08-26 12:40:56,086 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 12:40:56,087 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 12:40:56,087 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 12:40:56,087 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 12:40:56,095 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:40:56" (1/1) ... [2023-08-26 12:40:56,095 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:40:56" (1/1) ... [2023-08-26 12:40:56,108 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:40:56" (1/1) ... [2023-08-26 12:40:56,109 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:40:56" (1/1) ... [2023-08-26 12:40:56,113 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:40:56" (1/1) ... [2023-08-26 12:40:56,117 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:40:56" (1/1) ... [2023-08-26 12:40:56,119 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:40:56" (1/1) ... [2023-08-26 12:40:56,120 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:40:56" (1/1) ... [2023-08-26 12:40:56,135 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 12:40:56,136 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 12:40:56,136 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 12:40:56,136 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 12:40:56,140 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:40:56" (1/1) ... [2023-08-26 12:40:56,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:40:56,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:40:56,178 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 12:40:56,187 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 12:40:56,215 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 12:40:56,215 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 12:40:56,216 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 12:40:56,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 12:40:56,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 12:40:56,216 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-26 12:40:56,216 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-26 12:40:56,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 12:40:56,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 12:40:56,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 12:40:56,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 12:40:56,219 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 12:40:56,373 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 12:40:56,375 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 12:40:56,556 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 12:40:56,562 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 12:40:56,563 INFO L302 CfgBuilder]: Removed 18 assume(true) statements. [2023-08-26 12:40:56,565 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:40:56 BoogieIcfgContainer [2023-08-26 12:40:56,565 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 12:40:56,567 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 12:40:56,567 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 12:40:56,570 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 12:40:56,570 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 12:40:55" (1/3) ... [2023-08-26 12:40:56,571 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a41ee47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:40:56, skipping insertion in model container [2023-08-26 12:40:56,571 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:40:56" (2/3) ... [2023-08-26 12:40:56,571 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a41ee47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:40:56, skipping insertion in model container [2023-08-26 12:40:56,571 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:40:56" (3/3) ... [2023-08-26 12:40:56,573 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_60-invariant_racefree.i [2023-08-26 12:40:56,588 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 12:40:56,589 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-08-26 12:40:56,589 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 12:40:56,645 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-26 12:40:56,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 152 transitions, 312 flow [2023-08-26 12:40:56,753 INFO L124 PetriNetUnfolderBase]: 36/217 cut-off events. [2023-08-26 12:40:56,754 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 12:40:56,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 217 events. 36/217 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 765 event pairs, 0 based on Foata normal form. 0/167 useless extension candidates. Maximal degree in co-relation 119. Up to 6 conditions per place. [2023-08-26 12:40:56,763 INFO L82 GeneralOperation]: Start removeDead. Operand has 131 places, 152 transitions, 312 flow [2023-08-26 12:40:56,769 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 131 places, 152 transitions, 312 flow [2023-08-26 12:40:56,772 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:40:56,779 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 131 places, 152 transitions, 312 flow [2023-08-26 12:40:56,782 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 131 places, 152 transitions, 312 flow [2023-08-26 12:40:56,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 152 transitions, 312 flow [2023-08-26 12:40:56,813 INFO L124 PetriNetUnfolderBase]: 36/217 cut-off events. [2023-08-26 12:40:56,813 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 12:40:56,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 217 events. 36/217 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 765 event pairs, 0 based on Foata normal form. 0/167 useless extension candidates. Maximal degree in co-relation 119. Up to 6 conditions per place. [2023-08-26 12:40:56,819 INFO L119 LiptonReduction]: Number of co-enabled transitions 6958 [2023-08-26 12:40:59,540 INFO L134 LiptonReduction]: Checked pairs total: 17430 [2023-08-26 12:40:59,540 INFO L136 LiptonReduction]: Total number of compositions: 119 [2023-08-26 12:40:59,552 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:40:59,558 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;@2ecc1101, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:40:59,558 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-08-26 12:40:59,561 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:40:59,561 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-08-26 12:40:59,561 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:40:59,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:40:59,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:40:59,563 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-26 12:40:59,567 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:40:59,567 INFO L85 PathProgramCache]: Analyzing trace with hash 19167, now seen corresponding path program 1 times [2023-08-26 12:40:59,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:40:59,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251161783] [2023-08-26 12:40:59,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:40:59,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:40:59,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:40:59,764 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 12:40:59,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:40:59,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251161783] [2023-08-26 12:40:59,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251161783] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:40:59,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:40:59,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:40:59,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142098925] [2023-08-26 12:40:59,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:40:59,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:40:59,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:40:59,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:40:59,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:40:59,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 271 [2023-08-26 12:40:59,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 68 transitions, 144 flow. Second operand has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:40:59,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:40:59,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 271 [2023-08-26 12:40:59,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:40:59,952 INFO L124 PetriNetUnfolderBase]: 258/642 cut-off events. [2023-08-26 12:40:59,952 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 12:40:59,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1197 conditions, 642 events. 258/642 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 3281 event pairs, 225 based on Foata normal form. 117/599 useless extension candidates. Maximal degree in co-relation 1142. Up to 514 conditions per place. [2023-08-26 12:40:59,957 INFO L140 encePairwiseOnDemand]: 249/271 looper letters, 38 selfloop transitions, 2 changer transitions 12/64 dead transitions. [2023-08-26 12:40:59,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 64 transitions, 240 flow [2023-08-26 12:40:59,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:40:59,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:40:59,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 414 transitions. [2023-08-26 12:40:59,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5092250922509225 [2023-08-26 12:40:59,977 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 414 transitions. [2023-08-26 12:40:59,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 414 transitions. [2023-08-26 12:40:59,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:40:59,981 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 414 transitions. [2023-08-26 12:40:59,984 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.0) internal successors, (414), 3 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:40:59,988 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:40:59,988 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:40:59,990 INFO L175 Difference]: Start difference. First operand has 51 places, 68 transitions, 144 flow. Second operand 3 states and 414 transitions. [2023-08-26 12:40:59,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 64 transitions, 240 flow [2023-08-26 12:40:59,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 64 transitions, 240 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:40:59,995 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 108 flow [2023-08-26 12:40:59,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2023-08-26 12:40:59,999 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2023-08-26 12:40:59,999 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 108 flow [2023-08-26 12:41:00,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:00,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:41:00,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:41:00,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 12:41:00,001 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-26 12:41:00,001 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:41:00,001 INFO L85 PathProgramCache]: Analyzing trace with hash 19168, now seen corresponding path program 1 times [2023-08-26 12:41:00,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:41:00,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458551106] [2023-08-26 12:41:00,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:41:00,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:41:00,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:41:00,119 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 12:41:00,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:41:00,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458551106] [2023-08-26 12:41:00,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458551106] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:41:00,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:41:00,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:41:00,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061732846] [2023-08-26 12:41:00,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:41:00,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:41:00,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:41:00,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:41:00,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:41:00,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 271 [2023-08-26 12:41:00,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:00,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:41:00,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 271 [2023-08-26 12:41:00,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:41:00,244 INFO L124 PetriNetUnfolderBase]: 257/668 cut-off events. [2023-08-26 12:41:00,245 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 12:41:00,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1245 conditions, 668 events. 257/668 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 3529 event pairs, 0 based on Foata normal form. 0/533 useless extension candidates. Maximal degree in co-relation 1188. Up to 518 conditions per place. [2023-08-26 12:41:00,249 INFO L140 encePairwiseOnDemand]: 267/271 looper letters, 51 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2023-08-26 12:41:00,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 65 transitions, 248 flow [2023-08-26 12:41:00,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:41:00,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:41:00,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 373 transitions. [2023-08-26 12:41:00,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45879458794587946 [2023-08-26 12:41:00,252 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 373 transitions. [2023-08-26 12:41:00,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 373 transitions. [2023-08-26 12:41:00,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:41:00,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 373 transitions. [2023-08-26 12:41:00,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:00,255 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:00,256 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 271.0) internal successors, (1084), 4 states have internal predecessors, (1084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:00,256 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 108 flow. Second operand 3 states and 373 transitions. [2023-08-26 12:41:00,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 65 transitions, 248 flow [2023-08-26 12:41:00,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 65 transitions, 244 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:41:00,259 INFO L231 Difference]: Finished difference. Result has 52 places, 48 transitions, 114 flow [2023-08-26 12:41:00,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=114, PETRI_PLACES=52, PETRI_TRANSITIONS=48} [2023-08-26 12:41:00,260 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 1 predicate places. [2023-08-26 12:41:00,260 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 48 transitions, 114 flow [2023-08-26 12:41:00,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:00,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:41:00,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 12:41:00,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 12:41:00,261 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-26 12:41:00,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:41:00,262 INFO L85 PathProgramCache]: Analyzing trace with hash 571513995, now seen corresponding path program 1 times [2023-08-26 12:41:00,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:41:00,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660521410] [2023-08-26 12:41:00,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:41:00,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:41:00,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:41:00,412 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 12:41:00,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:41:00,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660521410] [2023-08-26 12:41:00,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660521410] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:41:00,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071892275] [2023-08-26 12:41:00,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:41:00,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:41:00,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:41:00,417 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 12:41:00,449 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 12:41:00,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:41:00,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 12:41:00,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:41:00,600 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 12:41:00,652 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 12:41:00,652 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:41:00,713 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 12:41:00,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071892275] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:41:00,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:41:00,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-26 12:41:00,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411507104] [2023-08-26 12:41:00,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:41:00,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 12:41:00,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:41:00,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 12:41:00,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-26 12:41:00,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 271 [2023-08-26 12:41:00,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 48 transitions, 114 flow. Second operand has 8 states, 8 states have (on average 107.875) internal successors, (863), 8 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:00,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:41:00,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 271 [2023-08-26 12:41:00,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:41:00,840 INFO L124 PetriNetUnfolderBase]: 33/103 cut-off events. [2023-08-26 12:41:00,840 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2023-08-26 12:41:00,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 242 conditions, 103 events. 33/103 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 348 event pairs, 0 based on Foata normal form. 16/109 useless extension candidates. Maximal degree in co-relation 196. Up to 64 conditions per place. [2023-08-26 12:41:00,842 INFO L140 encePairwiseOnDemand]: 267/271 looper letters, 35 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-08-26 12:41:00,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 42 transitions, 169 flow [2023-08-26 12:41:00,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:41:00,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:41:00,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 463 transitions. [2023-08-26 12:41:00,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42712177121771217 [2023-08-26 12:41:00,844 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 463 transitions. [2023-08-26 12:41:00,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 463 transitions. [2023-08-26 12:41:00,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:41:00,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 463 transitions. [2023-08-26 12:41:00,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 115.75) internal successors, (463), 4 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:00,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:00,849 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 271.0) internal successors, (1355), 5 states have internal predecessors, (1355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:00,849 INFO L175 Difference]: Start difference. First operand has 52 places, 48 transitions, 114 flow. Second operand 4 states and 463 transitions. [2023-08-26 12:41:00,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 42 transitions, 169 flow [2023-08-26 12:41:00,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 42 transitions, 163 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 12:41:00,851 INFO L231 Difference]: Finished difference. Result has 30 places, 25 transitions, 59 flow [2023-08-26 12:41:00,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=271, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=59, PETRI_PLACES=30, PETRI_TRANSITIONS=25} [2023-08-26 12:41:00,853 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -21 predicate places. [2023-08-26 12:41:00,853 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 25 transitions, 59 flow [2023-08-26 12:41:00,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 107.875) internal successors, (863), 8 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:00,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:41:00,854 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-26 12:41:00,860 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 12:41:01,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:41:01,060 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-08-26 12:41:01,060 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:41:01,061 INFO L85 PathProgramCache]: Analyzing trace with hash 537065141, now seen corresponding path program 1 times [2023-08-26 12:41:01,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:41:01,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422225201] [2023-08-26 12:41:01,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:41:01,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:41:01,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:41:01,078 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 12:41:01,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:41:01,102 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 12:41:01,102 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 12:41:01,103 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2023-08-26 12:41:01,104 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 8 remaining) [2023-08-26 12:41:01,105 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2023-08-26 12:41:01,105 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2023-08-26 12:41:01,105 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 8 remaining) [2023-08-26 12:41:01,105 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (2 of 8 remaining) [2023-08-26 12:41:01,105 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONASSERT (1 of 8 remaining) [2023-08-26 12:41:01,106 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONASSERT (0 of 8 remaining) [2023-08-26 12:41:01,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 12:41:01,106 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-26 12:41:01,108 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 12:41:01,108 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-26 12:41:01,137 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-26 12:41:01,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 203 transitions, 424 flow [2023-08-26 12:41:01,194 INFO L124 PetriNetUnfolderBase]: 62/360 cut-off events. [2023-08-26 12:41:01,195 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 12:41:01,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374 conditions, 360 events. 62/360 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1441 event pairs, 0 based on Foata normal form. 0/275 useless extension candidates. Maximal degree in co-relation 219. Up to 9 conditions per place. [2023-08-26 12:41:01,198 INFO L82 GeneralOperation]: Start removeDead. Operand has 172 places, 203 transitions, 424 flow [2023-08-26 12:41:01,201 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 172 places, 203 transitions, 424 flow [2023-08-26 12:41:01,202 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:41:01,202 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 172 places, 203 transitions, 424 flow [2023-08-26 12:41:01,202 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 172 places, 203 transitions, 424 flow [2023-08-26 12:41:01,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 172 places, 203 transitions, 424 flow [2023-08-26 12:41:01,237 INFO L124 PetriNetUnfolderBase]: 62/360 cut-off events. [2023-08-26 12:41:01,237 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 12:41:01,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 374 conditions, 360 events. 62/360 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1441 event pairs, 0 based on Foata normal form. 0/275 useless extension candidates. Maximal degree in co-relation 219. Up to 9 conditions per place. [2023-08-26 12:41:01,252 INFO L119 LiptonReduction]: Number of co-enabled transitions 19796 [2023-08-26 12:41:03,977 INFO L134 LiptonReduction]: Checked pairs total: 52045 [2023-08-26 12:41:03,977 INFO L136 LiptonReduction]: Total number of compositions: 155 [2023-08-26 12:41:03,979 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:41:03,980 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;@2ecc1101, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:41:03,980 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2023-08-26 12:41:03,981 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:41:03,981 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-08-26 12:41:03,981 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:41:03,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:41:03,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:41:03,982 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 12:41:03,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:41:03,982 INFO L85 PathProgramCache]: Analyzing trace with hash 32257, now seen corresponding path program 1 times [2023-08-26 12:41:03,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:41:03,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944617598] [2023-08-26 12:41:03,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:41:03,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:41:03,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:41:04,004 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 12:41:04,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:41:04,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944617598] [2023-08-26 12:41:04,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944617598] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:41:04,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:41:04,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:41:04,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048036167] [2023-08-26 12:41:04,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:41:04,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:41:04,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:41:04,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:41:04,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:41:04,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 358 [2023-08-26 12:41:04,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 99 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:04,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:41:04,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 358 [2023-08-26 12:41:04,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:41:04,943 INFO L124 PetriNetUnfolderBase]: 5444/9506 cut-off events. [2023-08-26 12:41:04,943 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2023-08-26 12:41:04,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17985 conditions, 9506 events. 5444/9506 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 72620 event pairs, 4672 based on Foata normal form. 1768/9144 useless extension candidates. Maximal degree in co-relation 6882. Up to 7875 conditions per place. [2023-08-26 12:41:04,999 INFO L140 encePairwiseOnDemand]: 328/358 looper letters, 70 selfloop transitions, 2 changer transitions 0/96 dead transitions. [2023-08-26 12:41:05,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 96 transitions, 354 flow [2023-08-26 12:41:05,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:41:05,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:41:05,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 564 transitions. [2023-08-26 12:41:05,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5251396648044693 [2023-08-26 12:41:05,003 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 564 transitions. [2023-08-26 12:41:05,003 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 564 transitions. [2023-08-26 12:41:05,003 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:41:05,003 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 564 transitions. [2023-08-26 12:41:05,005 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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 12:41:05,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:05,008 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:05,008 INFO L175 Difference]: Start difference. First operand has 74 places, 99 transitions, 216 flow. Second operand 3 states and 564 transitions. [2023-08-26 12:41:05,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 96 transitions, 354 flow [2023-08-26 12:41:05,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 96 transitions, 354 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:41:05,013 INFO L231 Difference]: Finished difference. Result has 74 places, 71 transitions, 164 flow [2023-08-26 12:41:05,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=74, PETRI_TRANSITIONS=71} [2023-08-26 12:41:05,016 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 0 predicate places. [2023-08-26 12:41:05,016 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 71 transitions, 164 flow [2023-08-26 12:41:05,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.66666666666666) internal successors, (449), 3 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:05,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:41:05,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:41:05,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 12:41:05,017 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 12:41:05,018 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:41:05,018 INFO L85 PathProgramCache]: Analyzing trace with hash 32258, now seen corresponding path program 1 times [2023-08-26 12:41:05,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:41:05,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930448504] [2023-08-26 12:41:05,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:41:05,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:41:05,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:41:05,092 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 12:41:05,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:41:05,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930448504] [2023-08-26 12:41:05,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930448504] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:41:05,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:41:05,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:41:05,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357527066] [2023-08-26 12:41:05,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:41:05,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:41:05,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:41:05,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:41:05,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:41:05,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 358 [2023-08-26 12:41:05,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 71 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:05,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:41:05,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 358 [2023-08-26 12:41:05,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:41:05,900 INFO L124 PetriNetUnfolderBase]: 5443/9599 cut-off events. [2023-08-26 12:41:05,901 INFO L125 PetriNetUnfolderBase]: For 91/91 co-relation queries the response was YES. [2023-08-26 12:41:05,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18251 conditions, 9599 events. 5443/9599 cut-off events. For 91/91 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 73126 event pairs, 4734 based on Foata normal form. 0/7659 useless extension candidates. Maximal degree in co-relation 17023. Up to 8369 conditions per place. [2023-08-26 12:41:05,955 INFO L140 encePairwiseOnDemand]: 354/358 looper letters, 59 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2023-08-26 12:41:05,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 85 transitions, 314 flow [2023-08-26 12:41:05,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:41:05,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:41:05,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 495 transitions. [2023-08-26 12:41:05,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46089385474860334 [2023-08-26 12:41:05,958 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 495 transitions. [2023-08-26 12:41:05,958 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 495 transitions. [2023-08-26 12:41:05,958 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:41:05,959 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 495 transitions. [2023-08-26 12:41:05,960 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.0) internal successors, (495), 3 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:05,962 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:05,963 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:05,963 INFO L175 Difference]: Start difference. First operand has 74 places, 71 transitions, 164 flow. Second operand 3 states and 495 transitions. [2023-08-26 12:41:05,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 85 transitions, 314 flow [2023-08-26 12:41:05,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 85 transitions, 310 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 12:41:05,974 INFO L231 Difference]: Finished difference. Result has 75 places, 72 transitions, 174 flow [2023-08-26 12:41:05,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=75, PETRI_TRANSITIONS=72} [2023-08-26 12:41:05,975 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 1 predicate places. [2023-08-26 12:41:05,975 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 72 transitions, 174 flow [2023-08-26 12:41:05,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:05,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:41:05,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 12:41:05,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 12:41:05,976 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 12:41:05,977 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:41:05,977 INFO L85 PathProgramCache]: Analyzing trace with hash -247763232, now seen corresponding path program 1 times [2023-08-26 12:41:05,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:41:05,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791519512] [2023-08-26 12:41:05,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:41:05,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:41:05,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:41:06,048 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 12:41:06,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:41:06,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791519512] [2023-08-26 12:41:06,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791519512] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:41:06,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634666131] [2023-08-26 12:41:06,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:41:06,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:41:06,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:41:06,053 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 12:41:06,075 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 12:41:06,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:41:06,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 12:41:06,121 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:41:06,131 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 12:41:06,169 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 12:41:06,169 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:41:06,211 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 12:41:06,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634666131] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:41:06,212 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:41:06,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2023-08-26 12:41:06,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549384984] [2023-08-26 12:41:06,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:41:06,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 12:41:06,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:41:06,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 12:41:06,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-08-26 12:41:06,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 358 [2023-08-26 12:41:06,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 72 transitions, 174 flow. Second operand has 7 states, 7 states have (on average 145.71428571428572) internal successors, (1020), 7 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:06,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:41:06,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 358 [2023-08-26 12:41:06,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:41:07,083 INFO L124 PetriNetUnfolderBase]: 4999/9054 cut-off events. [2023-08-26 12:41:07,083 INFO L125 PetriNetUnfolderBase]: For 387/387 co-relation queries the response was YES. [2023-08-26 12:41:07,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17389 conditions, 9054 events. 4999/9054 cut-off events. For 387/387 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 69084 event pairs, 645 based on Foata normal form. 12/7525 useless extension candidates. Maximal degree in co-relation 2711. Up to 6341 conditions per place. [2023-08-26 12:41:07,124 INFO L140 encePairwiseOnDemand]: 354/358 looper letters, 107 selfloop transitions, 4 changer transitions 0/135 dead transitions. [2023-08-26 12:41:07,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 135 transitions, 520 flow [2023-08-26 12:41:07,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 12:41:07,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 12:41:07,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 834 transitions. [2023-08-26 12:41:07,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659217877094972 [2023-08-26 12:41:07,136 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 834 transitions. [2023-08-26 12:41:07,136 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 834 transitions. [2023-08-26 12:41:07,137 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:41:07,137 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 834 transitions. [2023-08-26 12:41:07,138 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 166.8) internal successors, (834), 5 states have internal predecessors, (834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:07,141 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 358.0) internal successors, (2148), 6 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:07,141 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 358.0) internal successors, (2148), 6 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:07,141 INFO L175 Difference]: Start difference. First operand has 75 places, 72 transitions, 174 flow. Second operand 5 states and 834 transitions. [2023-08-26 12:41:07,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 135 transitions, 520 flow [2023-08-26 12:41:07,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 135 transitions, 518 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:41:07,147 INFO L231 Difference]: Finished difference. Result has 77 places, 71 transitions, 176 flow [2023-08-26 12:41:07,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=176, PETRI_PLACES=77, PETRI_TRANSITIONS=71} [2023-08-26 12:41:07,149 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 3 predicate places. [2023-08-26 12:41:07,149 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 71 transitions, 176 flow [2023-08-26 12:41:07,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 145.71428571428572) internal successors, (1020), 7 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:07,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:41:07,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:41:07,158 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 12:41:07,356 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,SelfDestructingSolverStorable6 [2023-08-26 12:41:07,357 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 12:41:07,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:41:07,357 INFO L85 PathProgramCache]: Analyzing trace with hash 915764914, now seen corresponding path program 1 times [2023-08-26 12:41:07,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:41:07,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708946665] [2023-08-26 12:41:07,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:41:07,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:41:07,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:41:07,415 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 12:41:07,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:41:07,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708946665] [2023-08-26 12:41:07,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708946665] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:41:07,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:41:07,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:41:07,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916859416] [2023-08-26 12:41:07,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:41:07,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:41:07,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:41:07,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:41:07,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:41:07,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 358 [2023-08-26 12:41:07,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 71 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:07,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:41:07,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 358 [2023-08-26 12:41:07,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:41:08,524 INFO L124 PetriNetUnfolderBase]: 9365/15796 cut-off events. [2023-08-26 12:41:08,524 INFO L125 PetriNetUnfolderBase]: For 322/322 co-relation queries the response was YES. [2023-08-26 12:41:08,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31078 conditions, 15796 events. 9365/15796 cut-off events. For 322/322 co-relation queries the response was YES. Maximal size of possible extension queue 519. Compared 116125 event pairs, 4200 based on Foata normal form. 0/13340 useless extension candidates. Maximal degree in co-relation 19468. Up to 8687 conditions per place. [2023-08-26 12:41:08,600 INFO L140 encePairwiseOnDemand]: 340/358 looper letters, 86 selfloop transitions, 11 changer transitions 0/111 dead transitions. [2023-08-26 12:41:08,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 111 transitions, 456 flow [2023-08-26 12:41:08,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:41:08,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:41:08,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 535 transitions. [2023-08-26 12:41:08,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49813780260707635 [2023-08-26 12:41:08,603 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 535 transitions. [2023-08-26 12:41:08,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 535 transitions. [2023-08-26 12:41:08,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:41:08,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 535 transitions. [2023-08-26 12:41:08,605 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 178.33333333333334) internal successors, (535), 3 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:08,606 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:08,607 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 358.0) internal successors, (1432), 4 states have internal predecessors, (1432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:08,607 INFO L175 Difference]: Start difference. First operand has 77 places, 71 transitions, 176 flow. Second operand 3 states and 535 transitions. [2023-08-26 12:41:08,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 111 transitions, 456 flow [2023-08-26 12:41:08,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 111 transitions, 446 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-26 12:41:08,610 INFO L231 Difference]: Finished difference. Result has 78 places, 80 transitions, 260 flow [2023-08-26 12:41:08,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=358, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=260, PETRI_PLACES=78, PETRI_TRANSITIONS=80} [2023-08-26 12:41:08,611 INFO L281 CegarLoopForPetriNet]: 74 programPoint places, 4 predicate places. [2023-08-26 12:41:08,611 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 80 transitions, 260 flow [2023-08-26 12:41:08,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:08,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:41:08,611 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-26 12:41:08,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 12:41:08,612 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2023-08-26 12:41:08,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:41:08,612 INFO L85 PathProgramCache]: Analyzing trace with hash -13667882, now seen corresponding path program 1 times [2023-08-26 12:41:08,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:41:08,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225683091] [2023-08-26 12:41:08,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:41:08,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:41:08,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:41:08,624 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 12:41:08,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:41:08,635 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 12:41:08,636 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 12:41:08,636 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2023-08-26 12:41:08,636 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 9 remaining) [2023-08-26 12:41:08,636 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2023-08-26 12:41:08,636 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2023-08-26 12:41:08,637 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 9 remaining) [2023-08-26 12:41:08,637 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (3 of 9 remaining) [2023-08-26 12:41:08,637 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONASSERT (2 of 9 remaining) [2023-08-26 12:41:08,637 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONASSERT (1 of 9 remaining) [2023-08-26 12:41:08,637 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONASSERT (0 of 9 remaining) [2023-08-26 12:41:08,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 12:41:08,637 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-26 12:41:08,638 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 12:41:08,638 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-08-26 12:41:08,658 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-26 12:41:08,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 254 transitions, 538 flow [2023-08-26 12:41:08,708 INFO L124 PetriNetUnfolderBase]: 93/540 cut-off events. [2023-08-26 12:41:08,708 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 12:41:08,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 568 conditions, 540 events. 93/540 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2277 event pairs, 1 based on Foata normal form. 0/412 useless extension candidates. Maximal degree in co-relation 368. Up to 16 conditions per place. [2023-08-26 12:41:08,715 INFO L82 GeneralOperation]: Start removeDead. Operand has 213 places, 254 transitions, 538 flow [2023-08-26 12:41:08,719 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 213 places, 254 transitions, 538 flow [2023-08-26 12:41:08,719 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:41:08,719 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 213 places, 254 transitions, 538 flow [2023-08-26 12:41:08,720 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 213 places, 254 transitions, 538 flow [2023-08-26 12:41:08,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 254 transitions, 538 flow [2023-08-26 12:41:08,766 INFO L124 PetriNetUnfolderBase]: 93/540 cut-off events. [2023-08-26 12:41:08,766 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 12:41:08,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 568 conditions, 540 events. 93/540 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2277 event pairs, 1 based on Foata normal form. 0/412 useless extension candidates. Maximal degree in co-relation 368. Up to 16 conditions per place. [2023-08-26 12:41:08,793 INFO L119 LiptonReduction]: Number of co-enabled transitions 37338 [2023-08-26 12:41:11,737 INFO L134 LiptonReduction]: Checked pairs total: 122086 [2023-08-26 12:41:11,737 INFO L136 LiptonReduction]: Total number of compositions: 188 [2023-08-26 12:41:11,738 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:41:11,739 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;@2ecc1101, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:41:11,739 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-08-26 12:41:11,740 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:41:11,740 INFO L124 PetriNetUnfolderBase]: 0/2 cut-off events. [2023-08-26 12:41:11,740 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:41:11,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:41:11,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:41:11,740 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 12:41:11,741 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:41:11,741 INFO L85 PathProgramCache]: Analyzing trace with hash 48049, now seen corresponding path program 1 times [2023-08-26 12:41:11,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:41:11,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545588932] [2023-08-26 12:41:11,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:41:11,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:41:11,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:41:11,790 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 12:41:11,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:41:11,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545588932] [2023-08-26 12:41:11,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545588932] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:41:11,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:41:11,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:41:11,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388452066] [2023-08-26 12:41:11,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:41:11,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:41:11,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:41:11,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:41:11,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:41:11,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 442 [2023-08-26 12:41:11,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 136 transitions, 302 flow. Second operand has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:11,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:41:11,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 442 [2023-08-26 12:41:11,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:41:26,844 INFO L124 PetriNetUnfolderBase]: 183257/265781 cut-off events. [2023-08-26 12:41:26,845 INFO L125 PetriNetUnfolderBase]: For 2091/2091 co-relation queries the response was YES. [2023-08-26 12:41:27,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515252 conditions, 265781 events. 183257/265781 cut-off events. For 2091/2091 co-relation queries the response was YES. Maximal size of possible extension queue 6248. Compared 2210347 event pairs, 111566 based on Foata normal form. 42784/250383 useless extension candidates. Maximal degree in co-relation 29262. Up to 247682 conditions per place. [2023-08-26 12:41:28,483 INFO L140 encePairwiseOnDemand]: 400/442 looper letters, 84 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2023-08-26 12:41:28,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 111 transitions, 424 flow [2023-08-26 12:41:28,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:41:28,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:41:28,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 681 transitions. [2023-08-26 12:41:28,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5135746606334841 [2023-08-26 12:41:28,486 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 681 transitions. [2023-08-26 12:41:28,486 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 681 transitions. [2023-08-26 12:41:28,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:41:28,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 681 transitions. [2023-08-26 12:41:28,488 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 227.0) internal successors, (681), 3 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:28,490 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 442.0) internal successors, (1768), 4 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:28,490 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 442.0) internal successors, (1768), 4 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:28,490 INFO L175 Difference]: Start difference. First operand has 99 places, 136 transitions, 302 flow. Second operand 3 states and 681 transitions. [2023-08-26 12:41:28,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 111 transitions, 424 flow [2023-08-26 12:41:28,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 111 transitions, 424 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:41:28,494 INFO L231 Difference]: Finished difference. Result has 99 places, 96 transitions, 234 flow [2023-08-26 12:41:28,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=442, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=96, 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=234, PETRI_PLACES=99, PETRI_TRANSITIONS=96} [2023-08-26 12:41:28,495 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, 0 predicate places. [2023-08-26 12:41:28,495 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 96 transitions, 234 flow [2023-08-26 12:41:28,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 182.66666666666666) internal successors, (548), 3 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:28,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:41:28,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:41:28,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 12:41:28,496 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 12:41:28,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:41:28,496 INFO L85 PathProgramCache]: Analyzing trace with hash 48048, now seen corresponding path program 1 times [2023-08-26 12:41:28,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:41:28,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375487535] [2023-08-26 12:41:28,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:41:28,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:41:28,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:41:28,520 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 12:41:28,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:41:28,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375487535] [2023-08-26 12:41:28,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375487535] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:41:28,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:41:28,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:41:28,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378355974] [2023-08-26 12:41:28,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:41:28,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:41:28,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:41:28,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:41:28,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:41:28,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 442 [2023-08-26 12:41:28,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 96 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:28,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:41:28,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 442 [2023-08-26 12:41:28,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:41:41,696 INFO L124 PetriNetUnfolderBase]: 165258/239388 cut-off events. [2023-08-26 12:41:41,696 INFO L125 PetriNetUnfolderBase]: For 7862/7862 co-relation queries the response was YES. [2023-08-26 12:41:42,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 473307 conditions, 239388 events. 165258/239388 cut-off events. For 7862/7862 co-relation queries the response was YES. Maximal size of possible extension queue 5804. Compared 1968357 event pairs, 144265 based on Foata normal form. 0/193619 useless extension candidates. Maximal degree in co-relation 473206. Up to 210634 conditions per place. [2023-08-26 12:41:43,221 INFO L140 encePairwiseOnDemand]: 438/442 looper letters, 109 selfloop transitions, 2 changer transitions 0/136 dead transitions. [2023-08-26 12:41:43,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 136 transitions, 536 flow [2023-08-26 12:41:43,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:41:43,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:41:43,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 673 transitions. [2023-08-26 12:41:43,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075414781297134 [2023-08-26 12:41:43,223 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 673 transitions. [2023-08-26 12:41:43,223 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 673 transitions. [2023-08-26 12:41:43,224 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:41:43,224 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 673 transitions. [2023-08-26 12:41:43,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 224.33333333333334) internal successors, (673), 3 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:43,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 442.0) internal successors, (1768), 4 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:43,227 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 442.0) internal successors, (1768), 4 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:43,227 INFO L175 Difference]: Start difference. First operand has 99 places, 96 transitions, 234 flow. Second operand 3 states and 673 transitions. [2023-08-26 12:41:43,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 136 transitions, 536 flow [2023-08-26 12:41:43,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 136 transitions, 534 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:41:43,234 INFO L231 Difference]: Finished difference. Result has 98 places, 94 transitions, 232 flow [2023-08-26 12:41:43,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=442, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=98, PETRI_TRANSITIONS=94} [2023-08-26 12:41:43,234 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -1 predicate places. [2023-08-26 12:41:43,235 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 94 transitions, 232 flow [2023-08-26 12:41:43,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:43,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:41:43,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 12:41:43,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 12:41:43,235 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 12:41:43,236 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:41:43,236 INFO L85 PathProgramCache]: Analyzing trace with hash 1461938011, now seen corresponding path program 1 times [2023-08-26 12:41:43,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:41:43,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316820330] [2023-08-26 12:41:43,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:41:43,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:41:43,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:41:43,291 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 12:41:43,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:41:43,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316820330] [2023-08-26 12:41:43,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316820330] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 12:41:43,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051708826] [2023-08-26 12:41:43,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:41:43,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:41:43,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:41:43,293 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 12:41:43,297 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 12:41:43,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:41:43,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-26 12:41:43,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 12:41:43,375 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 12:41:43,409 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 12:41:43,410 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 12:41:43,445 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 12:41:43,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051708826] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 12:41:43,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 12:41:43,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-08-26 12:41:43,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30245086] [2023-08-26 12:41:43,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 12:41:43,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 12:41:43,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:41:43,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 12:41:43,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-26 12:41:43,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 442 [2023-08-26 12:41:43,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 94 transitions, 232 flow. Second operand has 8 states, 8 states have (on average 183.875) internal successors, (1471), 8 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:43,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:41:43,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 442 [2023-08-26 12:41:43,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:41:45,454 INFO L124 PetriNetUnfolderBase]: 23050/36124 cut-off events. [2023-08-26 12:41:45,454 INFO L125 PetriNetUnfolderBase]: For 10465/10465 co-relation queries the response was YES. [2023-08-26 12:41:45,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77530 conditions, 36124 events. 23050/36124 cut-off events. For 10465/10465 co-relation queries the response was YES. Maximal size of possible extension queue 1388. Compared 281085 event pairs, 1950 based on Foata normal form. 2938/34651 useless extension candidates. Maximal degree in co-relation 77519. Up to 21840 conditions per place. [2023-08-26 12:41:45,626 INFO L140 encePairwiseOnDemand]: 438/442 looper letters, 132 selfloop transitions, 4 changer transitions 0/155 dead transitions. [2023-08-26 12:41:45,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 155 transitions, 613 flow [2023-08-26 12:41:45,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 12:41:45,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 12:41:45,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1234 transitions. [2023-08-26 12:41:45,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46530920060331826 [2023-08-26 12:41:45,629 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1234 transitions. [2023-08-26 12:41:45,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1234 transitions. [2023-08-26 12:41:45,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:41:45,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1234 transitions. [2023-08-26 12:41:45,631 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 205.66666666666666) internal successors, (1234), 6 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:45,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 442.0) internal successors, (3094), 7 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:45,636 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 442.0) internal successors, (3094), 7 states have internal predecessors, (3094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:45,637 INFO L175 Difference]: Start difference. First operand has 98 places, 94 transitions, 232 flow. Second operand 6 states and 1234 transitions. [2023-08-26 12:41:45,637 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 155 transitions, 613 flow [2023-08-26 12:41:45,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 155 transitions, 606 flow, removed 3 selfloop flow, removed 1 redundant places. [2023-08-26 12:41:45,649 INFO L231 Difference]: Finished difference. Result has 79 places, 69 transitions, 170 flow [2023-08-26 12:41:45,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=442, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=170, PETRI_PLACES=79, PETRI_TRANSITIONS=69} [2023-08-26 12:41:45,650 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -20 predicate places. [2023-08-26 12:41:45,650 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 69 transitions, 170 flow [2023-08-26 12:41:45,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 183.875) internal successors, (1471), 8 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:45,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:41:45,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:41:45,655 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 12:41:45,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 12:41:45,852 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 12:41:45,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:41:45,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1915893236, now seen corresponding path program 1 times [2023-08-26 12:41:45,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:41:45,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975023702] [2023-08-26 12:41:45,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:41:45,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:41:45,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:41:45,907 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 12:41:45,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:41:45,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975023702] [2023-08-26 12:41:45,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975023702] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:41:45,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:41:45,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:41:45,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569156770] [2023-08-26 12:41:45,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:41:45,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:41:45,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:41:45,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:41:45,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:41:45,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 442 [2023-08-26 12:41:45,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 69 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:45,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:41:45,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 442 [2023-08-26 12:41:45,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:41:46,074 INFO L124 PetriNetUnfolderBase]: 2224/3463 cut-off events. [2023-08-26 12:41:46,074 INFO L125 PetriNetUnfolderBase]: For 1208/1208 co-relation queries the response was YES. [2023-08-26 12:41:46,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7647 conditions, 3463 events. 2224/3463 cut-off events. For 1208/1208 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 17600 event pairs, 2224 based on Foata normal form. 0/3442 useless extension candidates. Maximal degree in co-relation 7635. Up to 3276 conditions per place. [2023-08-26 12:41:46,086 INFO L140 encePairwiseOnDemand]: 433/442 looper letters, 24 selfloop transitions, 1 changer transitions 0/28 dead transitions. [2023-08-26 12:41:46,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 28 transitions, 138 flow [2023-08-26 12:41:46,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:41:46,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:41:46,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 556 transitions. [2023-08-26 12:41:46,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4193061840120664 [2023-08-26 12:41:46,088 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 556 transitions. [2023-08-26 12:41:46,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 556 transitions. [2023-08-26 12:41:46,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:41:46,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 556 transitions. [2023-08-26 12:41:46,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.33333333333334) internal successors, (556), 3 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:46,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 442.0) internal successors, (1768), 4 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:46,091 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 442.0) internal successors, (1768), 4 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:46,091 INFO L175 Difference]: Start difference. First operand has 79 places, 69 transitions, 170 flow. Second operand 3 states and 556 transitions. [2023-08-26 12:41:46,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 28 transitions, 138 flow [2023-08-26 12:41:46,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 28 transitions, 129 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-26 12:41:46,093 INFO L231 Difference]: Finished difference. Result has 40 places, 28 transitions, 81 flow [2023-08-26 12:41:46,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=442, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=81, PETRI_PLACES=40, PETRI_TRANSITIONS=28} [2023-08-26 12:41:46,094 INFO L281 CegarLoopForPetriNet]: 99 programPoint places, -59 predicate places. [2023-08-26 12:41:46,094 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 28 transitions, 81 flow [2023-08-26 12:41:46,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:46,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:41:46,094 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2023-08-26 12:41:46,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-26 12:41:46,095 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2023-08-26 12:41:46,095 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:41:46,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1257961228, now seen corresponding path program 1 times [2023-08-26 12:41:46,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:41:46,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052102503] [2023-08-26 12:41:46,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:41:46,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:41:46,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:41:46,108 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-26 12:41:46,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-26 12:41:46,120 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-26 12:41:46,120 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-26 12:41:46,120 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2023-08-26 12:41:46,120 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2023-08-26 12:41:46,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2023-08-26 12:41:46,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 10 remaining) [2023-08-26 12:41:46,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2023-08-26 12:41:46,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (4 of 10 remaining) [2023-08-26 12:41:46,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONASSERT (3 of 10 remaining) [2023-08-26 12:41:46,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONASSERT (2 of 10 remaining) [2023-08-26 12:41:46,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONASSERT (1 of 10 remaining) [2023-08-26 12:41:46,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONASSERT (0 of 10 remaining) [2023-08-26 12:41:46,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-26 12:41:46,122 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-26 12:41:46,122 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-26 12:41:46,122 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2023-08-26 12:41:46,143 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-08-26 12:41:46,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 254 places, 305 transitions, 654 flow [2023-08-26 12:41:46,233 INFO L124 PetriNetUnfolderBase]: 136/796 cut-off events. [2023-08-26 12:41:46,234 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 12:41:46,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 851 conditions, 796 events. 136/796 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3622 event pairs, 6 based on Foata normal form. 0/609 useless extension candidates. Maximal degree in co-relation 560. Up to 32 conditions per place. [2023-08-26 12:41:46,247 INFO L82 GeneralOperation]: Start removeDead. Operand has 254 places, 305 transitions, 654 flow [2023-08-26 12:41:46,254 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 254 places, 305 transitions, 654 flow [2023-08-26 12:41:46,254 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:41:46,254 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 254 places, 305 transitions, 654 flow [2023-08-26 12:41:46,254 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 254 places, 305 transitions, 654 flow [2023-08-26 12:41:46,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 254 places, 305 transitions, 654 flow [2023-08-26 12:41:46,481 INFO L124 PetriNetUnfolderBase]: 136/796 cut-off events. [2023-08-26 12:41:46,481 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 12:41:46,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 851 conditions, 796 events. 136/796 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 3622 event pairs, 6 based on Foata normal form. 0/609 useless extension candidates. Maximal degree in co-relation 560. Up to 32 conditions per place. [2023-08-26 12:41:46,516 INFO L119 LiptonReduction]: Number of co-enabled transitions 59976 [2023-08-26 12:41:49,258 INFO L134 LiptonReduction]: Checked pairs total: 180633 [2023-08-26 12:41:49,259 INFO L136 LiptonReduction]: Total number of compositions: 222 [2023-08-26 12:41:49,260 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:41:49,260 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;@2ecc1101, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:41:49,260 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-26 12:41:49,262 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:41:49,262 INFO L124 PetriNetUnfolderBase]: 0/3 cut-off events. [2023-08-26 12:41:49,262 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:41:49,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:41:49,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 12:41:49,262 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 12:41:49,262 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:41:49,262 INFO L85 PathProgramCache]: Analyzing trace with hash 66533, now seen corresponding path program 1 times [2023-08-26 12:41:49,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:41:49,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745624664] [2023-08-26 12:41:49,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:41:49,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:41:49,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:41:49,286 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 12:41:49,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:41:49,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745624664] [2023-08-26 12:41:49,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745624664] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:41:49,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:41:49,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 12:41:49,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772953362] [2023-08-26 12:41:49,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:41:49,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:41:49,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:41:49,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:41:49,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:41:49,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 527 [2023-08-26 12:41:49,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 165 transitions, 374 flow. Second operand has 3 states, 3 states have (on average 225.66666666666666) internal successors, (677), 3 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:41:49,289 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:41:49,289 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 527 [2023-08-26 12:41:49,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand