/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/13-privatized_34-traces-minepp-L-needs-to-be-um_true.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 12:27:36,043 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 12:27:36,084 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 12:27:36,087 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 12:27:36,088 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 12:27:36,106 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 12:27:36,106 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 12:27:36,106 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 12:27:36,107 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 12:27:36,107 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 12:27:36,107 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 12:27:36,107 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 12:27:36,108 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 12:27:36,108 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 12:27:36,108 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 12:27:36,108 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 12:27:36,108 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 12:27:36,109 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 12:27:36,109 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 12:27:36,109 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 12:27:36,109 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 12:27:36,114 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 12:27:36,114 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 12:27:36,115 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 12:27:36,115 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 12:27:36,115 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 12:27:36,115 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 12:27:36,116 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:27:36,116 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 12:27:36,116 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 12:27:36,116 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 12:27:36,117 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 12:27:36,117 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 12:27:36,117 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 12:27:36,117 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 12:27:36,117 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 12:27:36,351 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 12:27:36,367 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 12:27:36,368 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 12:27:36,369 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 12:27:36,369 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 12:27:36,383 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/13-privatized_34-traces-minepp-L-needs-to-be-um_true.i [2023-08-26 12:27:37,239 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 12:27:37,430 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 12:27:37,430 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/13-privatized_34-traces-minepp-L-needs-to-be-um_true.i [2023-08-26 12:27:37,440 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87d3eb259/2c309f23334e452d9ce270f2a500a924/FLAGa8580d97e [2023-08-26 12:27:37,450 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87d3eb259/2c309f23334e452d9ce270f2a500a924 [2023-08-26 12:27:37,451 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 12:27:37,452 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 12:27:37,453 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 12:27:37,453 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 12:27:37,455 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 12:27:37,455 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:27:37" (1/1) ... [2023-08-26 12:27:37,456 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b7cc5f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:27:37, skipping insertion in model container [2023-08-26 12:27:37,456 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 12:27:37" (1/1) ... [2023-08-26 12:27:37,500 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 12:27:37,681 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:27:37,697 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 12:27:37,723 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [232] [2023-08-26 12:27:37,725 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [233] [2023-08-26 12:27:37,746 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 12:27:37,782 INFO L206 MainTranslator]: Completed translation [2023-08-26 12:27:37,783 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:27:37 WrapperNode [2023-08-26 12:27:37,783 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 12:27:37,784 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 12:27:37,784 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 12:27:37,784 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 12:27:37,788 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:27:37" (1/1) ... [2023-08-26 12:27:37,810 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:27:37" (1/1) ... [2023-08-26 12:27:37,828 INFO L138 Inliner]: procedures = 163, calls = 39, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 68 [2023-08-26 12:27:37,828 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 12:27:37,829 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 12:27:37,829 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 12:27:37,829 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 12:27:37,834 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:27:37" (1/1) ... [2023-08-26 12:27:37,834 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:27:37" (1/1) ... [2023-08-26 12:27:37,840 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:27:37" (1/1) ... [2023-08-26 12:27:37,841 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:27:37" (1/1) ... [2023-08-26 12:27:37,849 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:27:37" (1/1) ... [2023-08-26 12:27:37,851 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:27:37" (1/1) ... [2023-08-26 12:27:37,851 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:27:37" (1/1) ... [2023-08-26 12:27:37,852 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:27:37" (1/1) ... [2023-08-26 12:27:37,853 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 12:27:37,854 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 12:27:37,854 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 12:27:37,854 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 12:27:37,857 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:27:37" (1/1) ... [2023-08-26 12:27:37,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 12:27:37,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 12:27:37,878 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 12:27:37,884 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 12:27:37,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 12:27:37,902 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 12:27:37,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 12:27:37,903 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 12:27:37,903 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-26 12:27:37,903 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-26 12:27:37,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 12:27:37,903 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 12:27:37,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 12:27:37,903 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 12:27:37,904 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 12:27:37,998 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 12:27:37,999 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 12:27:38,107 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 12:27:38,111 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 12:27:38,111 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 12:27:38,113 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:27:38 BoogieIcfgContainer [2023-08-26 12:27:38,113 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 12:27:38,114 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 12:27:38,114 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 12:27:38,116 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 12:27:38,116 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 12:27:37" (1/3) ... [2023-08-26 12:27:38,117 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f1fd263 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:27:38, skipping insertion in model container [2023-08-26 12:27:38,117 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 12:27:37" (2/3) ... [2023-08-26 12:27:38,117 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f1fd263 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 12:27:38, skipping insertion in model container [2023-08-26 12:27:38,117 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 12:27:38" (3/3) ... [2023-08-26 12:27:38,118 INFO L112 eAbstractionObserver]: Analyzing ICFG 13-privatized_34-traces-minepp-L-needs-to-be-um_true.i [2023-08-26 12:27:38,129 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 12:27:38,129 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-08-26 12:27:38,129 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 12:27:38,160 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 12:27:38,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 91 transitions, 187 flow [2023-08-26 12:27:38,245 INFO L124 PetriNetUnfolderBase]: 3/90 cut-off events. [2023-08-26 12:27:38,245 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:27:38,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 90 events. 3/90 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 81 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 52. Up to 2 conditions per place. [2023-08-26 12:27:38,249 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 91 transitions, 187 flow [2023-08-26 12:27:38,252 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 80 transitions, 163 flow [2023-08-26 12:27:38,255 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 12:27:38,274 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 83 places, 80 transitions, 163 flow [2023-08-26 12:27:38,275 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 83 places, 80 transitions, 163 flow [2023-08-26 12:27:38,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 80 transitions, 163 flow [2023-08-26 12:27:38,291 INFO L124 PetriNetUnfolderBase]: 1/80 cut-off events. [2023-08-26 12:27:38,292 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:27:38,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 80 events. 1/80 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 60 event pairs, 0 based on Foata normal form. 0/77 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2023-08-26 12:27:38,293 INFO L119 LiptonReduction]: Number of co-enabled transitions 850 [2023-08-26 12:27:40,802 INFO L134 LiptonReduction]: Checked pairs total: 2409 [2023-08-26 12:27:40,802 INFO L136 LiptonReduction]: Total number of compositions: 73 [2023-08-26 12:27:40,811 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 12:27:40,814 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;@24c58a9a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 12:27:40,814 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-26 12:27:40,815 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 12:27:40,815 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 12:27:40,815 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:27:40,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:27:40,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 12:27:40,816 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 1 more)] === [2023-08-26 12:27:40,819 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:27:40,819 INFO L85 PathProgramCache]: Analyzing trace with hash 317, now seen corresponding path program 1 times [2023-08-26 12:27:40,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:27:40,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755052860] [2023-08-26 12:27:40,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:27:40,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:27:40,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:27:40,886 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 12:27:40,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:27:40,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755052860] [2023-08-26 12:27:40,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755052860] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:27:40,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:27:40,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 12:27:40,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117595230] [2023-08-26 12:27:40,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:27:40,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 12:27:40,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:27:40,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 12:27:40,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 12:27:40,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 87 out of 164 [2023-08-26 12:27:40,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 22 transitions, 47 flow. Second operand has 2 states, 2 states have (on average 87.5) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:27:40,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:27:40,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 87 of 164 [2023-08-26 12:27:40,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:27:40,936 INFO L124 PetriNetUnfolderBase]: 28/101 cut-off events. [2023-08-26 12:27:40,936 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:27:40,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 101 events. 28/101 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 333 event pairs, 25 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 159. Up to 63 conditions per place. [2023-08-26 12:27:40,938 INFO L140 encePairwiseOnDemand]: 162/164 looper letters, 12 selfloop transitions, 0 changer transitions 0/20 dead transitions. [2023-08-26 12:27:40,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 24 places, 20 transitions, 67 flow [2023-08-26 12:27:40,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 12:27:40,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 12:27:40,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 188 transitions. [2023-08-26 12:27:40,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2023-08-26 12:27:40,946 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 188 transitions. [2023-08-26 12:27:40,946 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 188 transitions. [2023-08-26 12:27:40,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:27:40,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 188 transitions. [2023-08-26 12:27:40,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 94.0) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:27:40,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:27:40,953 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:27:40,954 INFO L175 Difference]: Start difference. First operand has 25 places, 22 transitions, 47 flow. Second operand 2 states and 188 transitions. [2023-08-26 12:27:40,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 24 places, 20 transitions, 67 flow [2023-08-26 12:27:40,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 20 transitions, 66 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:27:40,956 INFO L231 Difference]: Finished difference. Result has 23 places, 20 transitions, 42 flow [2023-08-26 12:27:40,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=42, PETRI_PLACES=23, PETRI_TRANSITIONS=20} [2023-08-26 12:27:40,959 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, -2 predicate places. [2023-08-26 12:27:40,959 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 20 transitions, 42 flow [2023-08-26 12:27:40,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 87.5) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:27:40,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:27:40,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:27:40,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 12:27:40,960 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 1 more)] === [2023-08-26 12:27:40,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:27:40,960 INFO L85 PathProgramCache]: Analyzing trace with hash -949265597, now seen corresponding path program 1 times [2023-08-26 12:27:40,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:27:40,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749799661] [2023-08-26 12:27:40,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:27:40,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:27:40,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:27:41,110 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 12:27:41,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:27:41,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749799661] [2023-08-26 12:27:41,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749799661] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:27:41,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:27:41,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 12:27:41,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806553621] [2023-08-26 12:27:41,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:27:41,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:27:41,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:27:41,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:27:41,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:27:41,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 164 [2023-08-26 12:27:41,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 20 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 83.5) internal successors, (334), 4 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:27:41,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:27:41,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 164 [2023-08-26 12:27:41,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:27:41,179 INFO L124 PetriNetUnfolderBase]: 40/120 cut-off events. [2023-08-26 12:27:41,180 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 12:27:41,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 120 events. 40/120 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 392 event pairs, 22 based on Foata normal form. 8/119 useless extension candidates. Maximal degree in co-relation 216. Up to 57 conditions per place. [2023-08-26 12:27:41,181 INFO L140 encePairwiseOnDemand]: 159/164 looper letters, 17 selfloop transitions, 3 changer transitions 8/33 dead transitions. [2023-08-26 12:27:41,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 33 transitions, 124 flow [2023-08-26 12:27:41,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 12:27:41,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 12:27:41,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 440 transitions. [2023-08-26 12:27:41,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2023-08-26 12:27:41,186 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 440 transitions. [2023-08-26 12:27:41,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 440 transitions. [2023-08-26 12:27:41,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:27:41,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 440 transitions. [2023-08-26 12:27:41,189 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 88.0) internal successors, (440), 5 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:27:41,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 164.0) internal successors, (984), 6 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:27:41,192 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 164.0) internal successors, (984), 6 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:27:41,193 INFO L175 Difference]: Start difference. First operand has 23 places, 20 transitions, 42 flow. Second operand 5 states and 440 transitions. [2023-08-26 12:27:41,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 33 transitions, 124 flow [2023-08-26 12:27:41,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 33 transitions, 124 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 12:27:41,194 INFO L231 Difference]: Finished difference. Result has 30 places, 20 transitions, 57 flow [2023-08-26 12:27:41,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=57, PETRI_PLACES=30, PETRI_TRANSITIONS=20} [2023-08-26 12:27:41,194 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 5 predicate places. [2023-08-26 12:27:41,194 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 20 transitions, 57 flow [2023-08-26 12:27:41,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.5) internal successors, (334), 4 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:27:41,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:27:41,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:27:41,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 12:27:41,198 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 1 more)] === [2023-08-26 12:27:41,200 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:27:41,200 INFO L85 PathProgramCache]: Analyzing trace with hash 2046041774, now seen corresponding path program 1 times [2023-08-26 12:27:41,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:27:41,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433776394] [2023-08-26 12:27:41,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:27:41,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:27:41,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:27:41,311 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 12:27:41,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:27:41,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433776394] [2023-08-26 12:27:41,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433776394] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:27:41,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:27:41,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:27:41,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894882335] [2023-08-26 12:27:41,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:27:41,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:27:41,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:27:41,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:27:41,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:27:41,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 164 [2023-08-26 12:27:41,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 20 transitions, 57 flow. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:27:41,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:27:41,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 164 [2023-08-26 12:27:41,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:27:41,377 INFO L124 PetriNetUnfolderBase]: 51/132 cut-off events. [2023-08-26 12:27:41,377 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2023-08-26 12:27:41,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 132 events. 51/132 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 423 event pairs, 18 based on Foata normal form. 2/126 useless extension candidates. Maximal degree in co-relation 285. Up to 90 conditions per place. [2023-08-26 12:27:41,378 INFO L140 encePairwiseOnDemand]: 156/164 looper letters, 20 selfloop transitions, 5 changer transitions 5/33 dead transitions. [2023-08-26 12:27:41,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 33 transitions, 147 flow [2023-08-26 12:27:41,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:27:41,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:27:41,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 233 transitions. [2023-08-26 12:27:41,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4735772357723577 [2023-08-26 12:27:41,379 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 233 transitions. [2023-08-26 12:27:41,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 233 transitions. [2023-08-26 12:27:41,379 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:27:41,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 233 transitions. [2023-08-26 12:27:41,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:27:41,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:27:41,381 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:27:41,381 INFO L175 Difference]: Start difference. First operand has 30 places, 20 transitions, 57 flow. Second operand 3 states and 233 transitions. [2023-08-26 12:27:41,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 33 transitions, 147 flow [2023-08-26 12:27:41,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 33 transitions, 133 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-08-26 12:27:41,382 INFO L231 Difference]: Finished difference. Result has 27 places, 22 transitions, 76 flow [2023-08-26 12:27:41,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=47, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=27, PETRI_TRANSITIONS=22} [2023-08-26 12:27:41,383 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 2 predicate places. [2023-08-26 12:27:41,383 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 22 transitions, 76 flow [2023-08-26 12:27:41,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:27:41,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:27:41,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:27:41,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 12:27:41,384 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 1 more)] === [2023-08-26 12:27:41,384 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:27:41,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1876834764, now seen corresponding path program 2 times [2023-08-26 12:27:41,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:27:41,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167326617] [2023-08-26 12:27:41,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:27:41,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:27:41,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:27:41,503 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 12:27:41,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:27:41,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167326617] [2023-08-26 12:27:41,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167326617] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:27:41,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:27:41,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 12:27:41,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210169122] [2023-08-26 12:27:41,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:27:41,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 12:27:41,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:27:41,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 12:27:41,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-26 12:27:41,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 164 [2023-08-26 12:27:41,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 22 transitions, 76 flow. Second operand has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:27:41,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:27:41,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 164 [2023-08-26 12:27:41,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:27:41,546 INFO L124 PetriNetUnfolderBase]: 30/112 cut-off events. [2023-08-26 12:27:41,546 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-08-26 12:27:41,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 289 conditions, 112 events. 30/112 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 385 event pairs, 13 based on Foata normal form. 9/121 useless extension candidates. Maximal degree in co-relation 283. Up to 57 conditions per place. [2023-08-26 12:27:41,547 INFO L140 encePairwiseOnDemand]: 155/164 looper letters, 13 selfloop transitions, 10 changer transitions 4/30 dead transitions. [2023-08-26 12:27:41,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 30 transitions, 158 flow [2023-08-26 12:27:41,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:27:41,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:27:41,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 273 transitions. [2023-08-26 12:27:41,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41615853658536583 [2023-08-26 12:27:41,548 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 273 transitions. [2023-08-26 12:27:41,548 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 273 transitions. [2023-08-26 12:27:41,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:27:41,548 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 273 transitions. [2023-08-26 12:27:41,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 68.25) internal successors, (273), 4 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:27:41,550 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 164.0) internal successors, (820), 5 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:27:41,550 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 164.0) internal successors, (820), 5 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:27:41,550 INFO L175 Difference]: Start difference. First operand has 27 places, 22 transitions, 76 flow. Second operand 4 states and 273 transitions. [2023-08-26 12:27:41,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 30 transitions, 158 flow [2023-08-26 12:27:41,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 30 transitions, 151 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 12:27:41,551 INFO L231 Difference]: Finished difference. Result has 30 places, 22 transitions, 102 flow [2023-08-26 12:27:41,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=102, PETRI_PLACES=30, PETRI_TRANSITIONS=22} [2023-08-26 12:27:41,552 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 5 predicate places. [2023-08-26 12:27:41,552 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 22 transitions, 102 flow [2023-08-26 12:27:41,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:27:41,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:27:41,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:27:41,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 12:27:41,553 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 1 more)] === [2023-08-26 12:27:41,553 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:27:41,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1192708370, now seen corresponding path program 1 times [2023-08-26 12:27:41,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:27:41,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980100337] [2023-08-26 12:27:41,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:27:41,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:27:41,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:27:41,631 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 12:27:41,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:27:41,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980100337] [2023-08-26 12:27:41,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980100337] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:27:41,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:27:41,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:27:41,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861187501] [2023-08-26 12:27:41,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:27:41,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 12:27:41,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:27:41,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 12:27:41,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 12:27:41,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 164 [2023-08-26 12:27:41,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 22 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:27:41,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:27:41,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 164 [2023-08-26 12:27:41,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:27:41,676 INFO L124 PetriNetUnfolderBase]: 21/99 cut-off events. [2023-08-26 12:27:41,676 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2023-08-26 12:27:41,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310 conditions, 99 events. 21/99 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 349 event pairs, 6 based on Foata normal form. 5/103 useless extension candidates. Maximal degree in co-relation 303. Up to 65 conditions per place. [2023-08-26 12:27:41,678 INFO L140 encePairwiseOnDemand]: 156/164 looper letters, 14 selfloop transitions, 4 changer transitions 10/31 dead transitions. [2023-08-26 12:27:41,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 31 transitions, 197 flow [2023-08-26 12:27:41,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 12:27:41,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 12:27:41,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 231 transitions. [2023-08-26 12:27:41,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2023-08-26 12:27:41,680 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 231 transitions. [2023-08-26 12:27:41,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 231 transitions. [2023-08-26 12:27:41,681 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:27:41,681 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 231 transitions. [2023-08-26 12:27:41,681 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:27:41,682 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:27:41,682 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:27:41,682 INFO L175 Difference]: Start difference. First operand has 30 places, 22 transitions, 102 flow. Second operand 3 states and 231 transitions. [2023-08-26 12:27:41,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 31 transitions, 197 flow [2023-08-26 12:27:41,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 31 transitions, 177 flow, removed 0 selfloop flow, removed 3 redundant places. [2023-08-26 12:27:41,685 INFO L231 Difference]: Finished difference. Result has 30 places, 20 transitions, 96 flow [2023-08-26 12:27:41,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=30, PETRI_TRANSITIONS=20} [2023-08-26 12:27:41,687 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 5 predicate places. [2023-08-26 12:27:41,687 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 20 transitions, 96 flow [2023-08-26 12:27:41,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:27:41,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:27:41,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:27:41,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 12:27:41,688 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 1 more)] === [2023-08-26 12:27:41,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:27:41,688 INFO L85 PathProgramCache]: Analyzing trace with hash -951951574, now seen corresponding path program 2 times [2023-08-26 12:27:41,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:27:41,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294433674] [2023-08-26 12:27:41,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:27:41,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:27:41,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:27:41,827 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 12:27:41,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:27:41,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294433674] [2023-08-26 12:27:41,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294433674] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:27:41,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:27:41,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 12:27:41,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152615776] [2023-08-26 12:27:41,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:27:41,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 12:27:41,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:27:41,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 12:27:41,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-26 12:27:41,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 164 [2023-08-26 12:27:41,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 20 transitions, 96 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:27:41,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:27:41,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 164 [2023-08-26 12:27:41,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:27:41,872 INFO L124 PetriNetUnfolderBase]: 7/63 cut-off events. [2023-08-26 12:27:41,872 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2023-08-26 12:27:41,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 63 events. 7/63 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 172 event pairs, 1 based on Foata normal form. 3/66 useless extension candidates. Maximal degree in co-relation 193. Up to 37 conditions per place. [2023-08-26 12:27:41,874 INFO L140 encePairwiseOnDemand]: 157/164 looper letters, 8 selfloop transitions, 5 changer transitions 11/26 dead transitions. [2023-08-26 12:27:41,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 26 transitions, 172 flow [2023-08-26 12:27:41,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:27:41,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:27:41,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 245 transitions. [2023-08-26 12:27:41,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37347560975609756 [2023-08-26 12:27:41,875 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 245 transitions. [2023-08-26 12:27:41,875 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 245 transitions. [2023-08-26 12:27:41,876 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:27:41,876 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 245 transitions. [2023-08-26 12:27:41,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 61.25) internal successors, (245), 4 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:27:41,877 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 164.0) internal successors, (820), 5 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:27:41,878 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 164.0) internal successors, (820), 5 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:27:41,878 INFO L175 Difference]: Start difference. First operand has 30 places, 20 transitions, 96 flow. Second operand 4 states and 245 transitions. [2023-08-26 12:27:41,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 26 transitions, 172 flow [2023-08-26 12:27:41,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 26 transitions, 158 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-26 12:27:41,880 INFO L231 Difference]: Finished difference. Result has 31 places, 15 transitions, 67 flow [2023-08-26 12:27:41,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=67, PETRI_PLACES=31, PETRI_TRANSITIONS=15} [2023-08-26 12:27:41,882 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 6 predicate places. [2023-08-26 12:27:41,882 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 15 transitions, 67 flow [2023-08-26 12:27:41,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:27:41,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:27:41,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:27:41,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 12:27:41,883 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 1 more)] === [2023-08-26 12:27:41,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:27:41,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1830561687, now seen corresponding path program 1 times [2023-08-26 12:27:41,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:27:41,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056823571] [2023-08-26 12:27:41,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:27:41,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:27:41,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:27:41,978 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 12:27:41,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:27:41,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056823571] [2023-08-26 12:27:41,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056823571] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:27:41,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:27:41,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 12:27:41,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862047582] [2023-08-26 12:27:41,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:27:41,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 12:27:41,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:27:41,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 12:27:41,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 12:27:41,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 164 [2023-08-26 12:27:41,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 15 transitions, 67 flow. Second operand has 4 states, 4 states have (on average 63.5) internal successors, (254), 4 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:27:41,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:27:41,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 164 [2023-08-26 12:27:41,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:27:42,000 INFO L124 PetriNetUnfolderBase]: 2/26 cut-off events. [2023-08-26 12:27:42,000 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2023-08-26 12:27:42,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 26 events. 2/26 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 41 event pairs, 0 based on Foata normal form. 1/27 useless extension candidates. Maximal degree in co-relation 74. Up to 13 conditions per place. [2023-08-26 12:27:42,000 INFO L140 encePairwiseOnDemand]: 159/164 looper letters, 7 selfloop transitions, 3 changer transitions 7/19 dead transitions. [2023-08-26 12:27:42,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 19 transitions, 118 flow [2023-08-26 12:27:42,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:27:42,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:27:42,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 262 transitions. [2023-08-26 12:27:42,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2023-08-26 12:27:42,002 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 262 transitions. [2023-08-26 12:27:42,002 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 262 transitions. [2023-08-26 12:27:42,002 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:27:42,002 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 262 transitions. [2023-08-26 12:27:42,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 65.5) internal successors, (262), 4 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:27:42,003 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 164.0) internal successors, (820), 5 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:27:42,003 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 164.0) internal successors, (820), 5 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:27:42,003 INFO L175 Difference]: Start difference. First operand has 31 places, 15 transitions, 67 flow. Second operand 4 states and 262 transitions. [2023-08-26 12:27:42,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 19 transitions, 118 flow [2023-08-26 12:27:42,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 19 transitions, 97 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-26 12:27:42,004 INFO L231 Difference]: Finished difference. Result has 25 places, 12 transitions, 46 flow [2023-08-26 12:27:42,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=46, PETRI_PLACES=25, PETRI_TRANSITIONS=12} [2023-08-26 12:27:42,005 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, 0 predicate places. [2023-08-26 12:27:42,005 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 12 transitions, 46 flow [2023-08-26 12:27:42,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 63.5) internal successors, (254), 4 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:27:42,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 12:27:42,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 12:27:42,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 12:27:42,006 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (and 1 more)] === [2023-08-26 12:27:42,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 12:27:42,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1829817873, now seen corresponding path program 1 times [2023-08-26 12:27:42,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 12:27:42,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457423619] [2023-08-26 12:27:42,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 12:27:42,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 12:27:42,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 12:27:42,128 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 12:27:42,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 12:27:42,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457423619] [2023-08-26 12:27:42,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457423619] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 12:27:42,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 12:27:42,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 12:27:42,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950560283] [2023-08-26 12:27:42,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 12:27:42,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 12:27:42,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 12:27:42,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 12:27:42,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-26 12:27:42,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 164 [2023-08-26 12:27:42,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 12 transitions, 46 flow. Second operand has 6 states, 6 states have (on average 56.666666666666664) internal successors, (340), 6 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:27:42,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 12:27:42,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 164 [2023-08-26 12:27:42,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 12:27:42,143 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2023-08-26 12:27:42,143 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 12:27:42,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 9 events. 0/9 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 4 event pairs, 0 based on Foata normal form. 1/10 useless extension candidates. Maximal degree in co-relation 0. Up to 6 conditions per place. [2023-08-26 12:27:42,144 INFO L140 encePairwiseOnDemand]: 161/164 looper letters, 0 selfloop transitions, 0 changer transitions 9/9 dead transitions. [2023-08-26 12:27:42,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 9 transitions, 51 flow [2023-08-26 12:27:42,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 12:27:42,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 12:27:42,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 229 transitions. [2023-08-26 12:27:42,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3490853658536585 [2023-08-26 12:27:42,145 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 229 transitions. [2023-08-26 12:27:42,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 229 transitions. [2023-08-26 12:27:42,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 12:27:42,146 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 229 transitions. [2023-08-26 12:27:42,146 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 57.25) internal successors, (229), 4 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:27:42,147 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 164.0) internal successors, (820), 5 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:27:42,147 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 164.0) internal successors, (820), 5 states have internal predecessors, (820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:27:42,147 INFO L175 Difference]: Start difference. First operand has 25 places, 12 transitions, 46 flow. Second operand 4 states and 229 transitions. [2023-08-26 12:27:42,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 9 transitions, 51 flow [2023-08-26 12:27:42,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 9 transitions, 40 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-26 12:27:42,147 INFO L231 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2023-08-26 12:27:42,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=164, PETRI_DIFFERENCE_MINUEND_FLOW=24, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=18, PETRI_TRANSITIONS=0} [2023-08-26 12:27:42,148 INFO L281 CegarLoopForPetriNet]: 25 programPoint places, -7 predicate places. [2023-08-26 12:27:42,148 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2023-08-26 12:27:42,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.666666666666664) internal successors, (340), 6 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 12:27:42,150 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 4 remaining) [2023-08-26 12:27:42,150 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 4 remaining) [2023-08-26 12:27:42,151 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONASSERT (1 of 4 remaining) [2023-08-26 12:27:42,151 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-26 12:27:42,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 12:27:42,151 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1] [2023-08-26 12:27:42,153 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 12:27:42,153 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 12:27:42,155 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 12:27:42 BasicIcfg [2023-08-26 12:27:42,155 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 12:27:42,155 INFO L158 Benchmark]: Toolchain (without parser) took 4702.98ms. Allocated memory was 350.2MB in the beginning and 421.5MB in the end (delta: 71.3MB). Free memory was 325.3MB in the beginning and 207.9MB in the end (delta: 117.4MB). Peak memory consumption was 190.3MB. Max. memory is 16.0GB. [2023-08-26 12:27:42,155 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 350.2MB. Free memory was 328.5MB in the beginning and 328.4MB in the end (delta: 91.7kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 12:27:42,156 INFO L158 Benchmark]: CACSL2BoogieTranslator took 330.28ms. Allocated memory is still 350.2MB. Free memory was 324.8MB in the beginning and 305.9MB in the end (delta: 18.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-26 12:27:42,156 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.17ms. Allocated memory is still 350.2MB. Free memory was 305.4MB in the beginning and 303.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 12:27:42,156 INFO L158 Benchmark]: Boogie Preprocessor took 24.66ms. Allocated memory is still 350.2MB. Free memory was 303.8MB in the beginning and 302.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 12:27:42,156 INFO L158 Benchmark]: RCFGBuilder took 258.85ms. Allocated memory is still 350.2MB. Free memory was 302.3MB in the beginning and 287.6MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-26 12:27:42,157 INFO L158 Benchmark]: TraceAbstraction took 4040.78ms. Allocated memory was 350.2MB in the beginning and 421.5MB in the end (delta: 71.3MB). Free memory was 287.1MB in the beginning and 207.9MB in the end (delta: 79.1MB). Peak memory consumption was 152.6MB. Max. memory is 16.0GB. [2023-08-26 12:27:42,158 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 350.2MB. Free memory was 328.5MB in the beginning and 328.4MB in the end (delta: 91.7kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 330.28ms. Allocated memory is still 350.2MB. Free memory was 324.8MB in the beginning and 305.9MB in the end (delta: 18.8MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 44.17ms. Allocated memory is still 350.2MB. Free memory was 305.4MB in the beginning and 303.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 24.66ms. Allocated memory is still 350.2MB. Free memory was 303.8MB in the beginning and 302.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 258.85ms. Allocated memory is still 350.2MB. Free memory was 302.3MB in the beginning and 287.6MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 4040.78ms. Allocated memory was 350.2MB in the beginning and 421.5MB in the end (delta: 71.3MB). Free memory was 287.1MB in the beginning and 207.9MB in the end (delta: 79.1MB). Peak memory consumption was 152.6MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 232]: Unsoundness Warning unspecified type, defaulting to int C: short [232] - GenericResultAtLocation [Line: 233]: Unsoundness Warning unspecified type, defaulting to int C: short [233] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.5s, 83 PlacesBefore, 25 PlacesAfterwards, 80 TransitionsBefore, 22 TransitionsAfterwards, 850 CoEnabledTransitionPairs, 6 FixpointIterations, 46 TrivialSequentialCompositions, 27 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 73 TotalNumberOfCompositions, 2409 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 848, independent: 670, independent conditional: 0, independent unconditional: 670, dependent: 178, dependent conditional: 0, dependent unconditional: 178, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 408, independent: 376, independent conditional: 0, independent unconditional: 376, dependent: 32, dependent conditional: 0, dependent unconditional: 32, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 848, independent: 294, independent conditional: 0, independent unconditional: 294, dependent: 146, dependent conditional: 0, dependent unconditional: 146, unknown: 408, unknown conditional: 0, unknown unconditional: 408] , Statistics on independence cache: Total cache size (in pairs): 25, Positive cache size: 10, Positive conditional cache size: 0, Positive unconditional cache size: 10, Negative cache size: 15, Negative conditional cache size: 0, Negative unconditional cache size: 15, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 108 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 4.0s, OverallIterations: 8, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.6s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 50 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 50 mSDsluCounter, 12 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2 mSDsCounter, 57 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 255 IncrementalHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 57 mSolverCounterUnsat, 10 mSDtfsCounter, 255 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=102occurred in iteration=4, InterpolantAutomatonStates: 29, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 76 NumberOfCodeBlocks, 76 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 68 ConstructedInterpolants, 0 QuantifiedInterpolants, 398 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 12:27:42,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...