/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --cacsl2boogietranslator.pointer.base.address.is.valid.at.dereference ASSERTandASSUME --cacsl2boogietranslator.pointer.to.allocated.memory.at.dereference ASSERTandASSUME --cacsl2boogietranslator.check.array.bounds.for.arrays.that.are.off.heap ASSERTandASSUME --cacsl2boogietranslator.check.if.freed.pointer.was.valid true --cacsl2boogietranslator.adapt.memory.model.on.pointer.casts.if.necessary true -i ../../../trunk/examples/svcomp/goblint-regression/13-privatized_25-struct_nr_true.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 15:33:02,699 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 15:33:02,762 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 15:33:02,766 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 15:33:02,767 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 15:33:02,789 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 15:33:02,790 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 15:33:02,790 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 15:33:02,790 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 15:33:02,793 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 15:33:02,793 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 15:33:02,793 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 15:33:02,794 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 15:33:02,794 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 15:33:02,795 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 15:33:02,795 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 15:33:02,795 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 15:33:02,795 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 15:33:02,795 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 15:33:02,795 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 15:33:02,795 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 15:33:02,796 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 15:33:02,796 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 15:33:02,797 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 15:33:02,797 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 15:33:02,797 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 15:33:02,797 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 15:33:02,797 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:33:02,797 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 15:33:02,798 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 15:33:02,798 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 15:33:02,798 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 15:33:02,798 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 15:33:02,799 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 15:33:02,799 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 15:33:02,799 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 15:33:03,075 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 15:33:03,092 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 15:33:03,094 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 15:33:03,094 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 15:33:03,094 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 15:33:03,095 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/13-privatized_25-struct_nr_true.i [2023-08-26 15:33:04,052 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 15:33:04,268 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 15:33:04,268 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/13-privatized_25-struct_nr_true.i [2023-08-26 15:33:04,278 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/149eb5cce/0c05a0e41e1e4a80a5c3e77b0d2115cf/FLAG6a1d21124 [2023-08-26 15:33:04,294 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/149eb5cce/0c05a0e41e1e4a80a5c3e77b0d2115cf [2023-08-26 15:33:04,305 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 15:33:04,306 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 15:33:04,307 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 15:33:04,307 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 15:33:04,309 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 15:33:04,309 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:33:04" (1/1) ... [2023-08-26 15:33:04,310 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cbdd910 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:33:04, skipping insertion in model container [2023-08-26 15:33:04,310 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:33:04" (1/1) ... [2023-08-26 15:33:04,365 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 15:33:04,618 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:33:04,628 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 15:33:04,651 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [231] [2023-08-26 15:33:04,653 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [232] [2023-08-26 15:33:04,673 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:33:04,695 INFO L206 MainTranslator]: Completed translation [2023-08-26 15:33:04,696 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:33:04 WrapperNode [2023-08-26 15:33:04,696 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 15:33:04,697 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 15:33:04,697 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 15:33:04,697 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 15:33:04,702 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:33:04" (1/1) ... [2023-08-26 15:33:04,711 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:33:04" (1/1) ... [2023-08-26 15:33:04,726 INFO L138 Inliner]: procedures = 162, calls = 25, calls flagged for inlining = 7, calls inlined = 10, statements flattened = 88 [2023-08-26 15:33:04,726 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 15:33:04,727 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 15:33:04,727 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 15:33:04,727 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 15:33:04,732 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:33:04" (1/1) ... [2023-08-26 15:33:04,733 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:33:04" (1/1) ... [2023-08-26 15:33:04,735 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:33:04" (1/1) ... [2023-08-26 15:33:04,735 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:33:04" (1/1) ... [2023-08-26 15:33:04,739 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:33:04" (1/1) ... [2023-08-26 15:33:04,741 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:33:04" (1/1) ... [2023-08-26 15:33:04,742 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:33:04" (1/1) ... [2023-08-26 15:33:04,743 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:33:04" (1/1) ... [2023-08-26 15:33:04,744 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 15:33:04,745 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 15:33:04,745 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 15:33:04,745 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 15:33:04,746 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:33:04" (1/1) ... [2023-08-26 15:33:04,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:33:04,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:33:04,782 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 15:33:04,784 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 15:33:04,810 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 15:33:04,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 15:33:04,810 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 15:33:04,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 15:33:04,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 15:33:04,810 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-26 15:33:04,810 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-26 15:33:04,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 15:33:04,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 15:33:04,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 15:33:04,811 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 15:33:04,812 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 15:33:04,904 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 15:33:04,905 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 15:33:05,097 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 15:33:05,102 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 15:33:05,102 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 15:33:05,103 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:33:05 BoogieIcfgContainer [2023-08-26 15:33:05,103 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 15:33:05,105 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 15:33:05,105 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 15:33:05,107 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 15:33:05,107 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:33:04" (1/3) ... [2023-08-26 15:33:05,107 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@389bccec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:33:05, skipping insertion in model container [2023-08-26 15:33:05,108 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:33:04" (2/3) ... [2023-08-26 15:33:05,108 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@389bccec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:33:05, skipping insertion in model container [2023-08-26 15:33:05,108 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:33:05" (3/3) ... [2023-08-26 15:33:05,109 INFO L112 eAbstractionObserver]: Analyzing ICFG 13-privatized_25-struct_nr_true.i [2023-08-26 15:33:05,123 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 15:33:05,124 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-08-26 15:33:05,124 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 15:33:05,189 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-26 15:33:05,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 100 places, 104 transitions, 216 flow [2023-08-26 15:33:05,265 INFO L124 PetriNetUnfolderBase]: 8/103 cut-off events. [2023-08-26 15:33:05,265 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 15:33:05,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108 conditions, 103 events. 8/103 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 160 event pairs, 0 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2023-08-26 15:33:05,286 INFO L82 GeneralOperation]: Start removeDead. Operand has 100 places, 104 transitions, 216 flow [2023-08-26 15:33:05,290 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 96 transitions, 195 flow [2023-08-26 15:33:05,294 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:33:05,304 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 92 places, 96 transitions, 195 flow [2023-08-26 15:33:05,307 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 92 places, 96 transitions, 195 flow [2023-08-26 15:33:05,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 96 transitions, 195 flow [2023-08-26 15:33:05,334 INFO L124 PetriNetUnfolderBase]: 8/96 cut-off events. [2023-08-26 15:33:05,335 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:33:05,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100 conditions, 96 events. 8/96 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 160 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2023-08-26 15:33:05,337 INFO L119 LiptonReduction]: Number of co-enabled transitions 1768 [2023-08-26 15:33:07,425 INFO L134 LiptonReduction]: Checked pairs total: 4691 [2023-08-26 15:33:07,425 INFO L136 LiptonReduction]: Total number of compositions: 111 [2023-08-26 15:33:07,460 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 15:33:07,466 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;@240d0bcb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:33:07,466 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-08-26 15:33:07,467 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:33:07,467 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 15:33:07,467 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:33:07,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:33:07,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 15:33:07,468 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 15:33:07,471 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:33:07,471 INFO L85 PathProgramCache]: Analyzing trace with hash 422, now seen corresponding path program 1 times [2023-08-26 15:33:07,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:33:07,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773109641] [2023-08-26 15:33:07,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:33:07,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:33:07,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:33:07,560 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 15:33:07,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:33:07,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773109641] [2023-08-26 15:33:07,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773109641] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:33:07,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:33:07,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 15:33:07,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970708651] [2023-08-26 15:33:07,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:33:07,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 15:33:07,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:33:07,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 15:33:07,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 15:33:07,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 215 [2023-08-26 15:33:07,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 31 transitions, 65 flow. Second operand has 2 states, 2 states have (on average 90.5) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:07,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:33:07,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 215 [2023-08-26 15:33:07,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:33:07,652 INFO L124 PetriNetUnfolderBase]: 90/201 cut-off events. [2023-08-26 15:33:07,653 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:33:07,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 407 conditions, 201 events. 90/201 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 713 event pairs, 90 based on Foata normal form. 11/149 useless extension candidates. Maximal degree in co-relation 398. Up to 202 conditions per place. [2023-08-26 15:33:07,655 INFO L140 encePairwiseOnDemand]: 208/215 looper letters, 21 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2023-08-26 15:33:07,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 21 transitions, 87 flow [2023-08-26 15:33:07,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 15:33:07,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 15:33:07,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 208 transitions. [2023-08-26 15:33:07,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48372093023255813 [2023-08-26 15:33:07,663 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 208 transitions. [2023-08-26 15:33:07,664 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 208 transitions. [2023-08-26 15:33:07,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:33:07,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 208 transitions. [2023-08-26 15:33:07,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 104.0) internal successors, (208), 2 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:07,672 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:07,673 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 215.0) internal successors, (645), 3 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:07,674 INFO L175 Difference]: Start difference. First operand has 31 places, 31 transitions, 65 flow. Second operand 2 states and 208 transitions. [2023-08-26 15:33:07,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 21 transitions, 87 flow [2023-08-26 15:33:07,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 21 transitions, 86 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:33:07,676 INFO L231 Difference]: Finished difference. Result has 25 places, 21 transitions, 44 flow [2023-08-26 15:33:07,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=215, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=44, PETRI_PLACES=25, PETRI_TRANSITIONS=21} [2023-08-26 15:33:07,679 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -6 predicate places. [2023-08-26 15:33:07,679 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 21 transitions, 44 flow [2023-08-26 15:33:07,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 90.5) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:07,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:33:07,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 15:33:07,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 15:33:07,680 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 15:33:07,680 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:33:07,680 INFO L85 PathProgramCache]: Analyzing trace with hash 12821201, now seen corresponding path program 1 times [2023-08-26 15:33:07,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:33:07,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700495080] [2023-08-26 15:33:07,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:33:07,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:33:07,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:33:07,863 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 15:33:07,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:33:07,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700495080] [2023-08-26 15:33:07,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700495080] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:33:07,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:33:07,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:33:07,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320918375] [2023-08-26 15:33:07,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:33:07,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:33:07,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:33:07,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:33:07,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:33:07,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 215 [2023-08-26 15:33:07,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:07,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:33:07,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 215 [2023-08-26 15:33:07,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:33:07,905 INFO L124 PetriNetUnfolderBase]: 84/189 cut-off events. [2023-08-26 15:33:07,905 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:33:07,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 383 conditions, 189 events. 84/189 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 669 event pairs, 50 based on Foata normal form. 0/132 useless extension candidates. Maximal degree in co-relation 380. Up to 176 conditions per place. [2023-08-26 15:33:07,906 INFO L140 encePairwiseOnDemand]: 210/215 looper letters, 24 selfloop transitions, 3 changer transitions 0/27 dead transitions. [2023-08-26 15:33:07,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 27 transitions, 110 flow [2023-08-26 15:33:07,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:33:07,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:33:07,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 266 transitions. [2023-08-26 15:33:07,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4124031007751938 [2023-08-26 15:33:07,908 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 266 transitions. [2023-08-26 15:33:07,908 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 266 transitions. [2023-08-26 15:33:07,909 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:33:07,909 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 266 transitions. [2023-08-26 15:33:07,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:07,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 215.0) internal successors, (860), 4 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:07,912 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 215.0) internal successors, (860), 4 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:07,912 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 44 flow. Second operand 3 states and 266 transitions. [2023-08-26 15:33:07,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 27 transitions, 110 flow [2023-08-26 15:33:07,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 27 transitions, 110 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 15:33:07,913 INFO L231 Difference]: Finished difference. Result has 28 places, 23 transitions, 65 flow [2023-08-26 15:33:07,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=215, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=28, PETRI_TRANSITIONS=23} [2023-08-26 15:33:07,913 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -3 predicate places. [2023-08-26 15:33:07,913 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 23 transitions, 65 flow [2023-08-26 15:33:07,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:07,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:33:07,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-26 15:33:07,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 15:33:07,914 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 15:33:07,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:33:07,914 INFO L85 PathProgramCache]: Analyzing trace with hash -563562784, now seen corresponding path program 1 times [2023-08-26 15:33:07,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:33:07,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40123515] [2023-08-26 15:33:07,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:33:07,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:33:07,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:33:07,979 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 15:33:07,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:33:07,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40123515] [2023-08-26 15:33:07,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40123515] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:33:07,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:33:07,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 15:33:07,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444616660] [2023-08-26 15:33:07,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:33:07,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 15:33:07,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:33:07,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 15:33:07,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-26 15:33:07,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 215 [2023-08-26 15:33:07,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 23 transitions, 65 flow. Second operand has 5 states, 5 states have (on average 78.2) internal successors, (391), 5 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:07,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:33:07,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 215 [2023-08-26 15:33:07,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:33:08,071 INFO L124 PetriNetUnfolderBase]: 95/215 cut-off events. [2023-08-26 15:33:08,071 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2023-08-26 15:33:08,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 215 events. 95/215 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 856 event pairs, 30 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 476. Up to 148 conditions per place. [2023-08-26 15:33:08,073 INFO L140 encePairwiseOnDemand]: 208/215 looper letters, 38 selfloop transitions, 9 changer transitions 0/47 dead transitions. [2023-08-26 15:33:08,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 47 transitions, 218 flow [2023-08-26 15:33:08,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 15:33:08,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 15:33:08,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 510 transitions. [2023-08-26 15:33:08,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2023-08-26 15:33:08,076 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 510 transitions. [2023-08-26 15:33:08,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 510 transitions. [2023-08-26 15:33:08,076 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:33:08,076 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 510 transitions. [2023-08-26 15:33:08,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 85.0) internal successors, (510), 6 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:08,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 215.0) internal successors, (1505), 7 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:08,080 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 215.0) internal successors, (1505), 7 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:08,080 INFO L175 Difference]: Start difference. First operand has 28 places, 23 transitions, 65 flow. Second operand 6 states and 510 transitions. [2023-08-26 15:33:08,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 47 transitions, 218 flow [2023-08-26 15:33:08,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 47 transitions, 214 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:33:08,081 INFO L231 Difference]: Finished difference. Result has 35 places, 29 transitions, 120 flow [2023-08-26 15:33:08,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=215, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=120, PETRI_PLACES=35, PETRI_TRANSITIONS=29} [2023-08-26 15:33:08,082 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 4 predicate places. [2023-08-26 15:33:08,082 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 29 transitions, 120 flow [2023-08-26 15:33:08,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 78.2) internal successors, (391), 5 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:08,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:33:08,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:33:08,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 15:33:08,083 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 15:33:08,083 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:33:08,083 INFO L85 PathProgramCache]: Analyzing trace with hash -296087583, now seen corresponding path program 1 times [2023-08-26 15:33:08,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:33:08,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177384031] [2023-08-26 15:33:08,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:33:08,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:33:08,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:33:08,145 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 15:33:08,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:33:08,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177384031] [2023-08-26 15:33:08,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177384031] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:33:08,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:33:08,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 15:33:08,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184948954] [2023-08-26 15:33:08,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:33:08,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:33:08,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:33:08,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:33:08,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:33:08,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 80 out of 215 [2023-08-26 15:33:08,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:08,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:33:08,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 80 of 215 [2023-08-26 15:33:08,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:33:08,177 INFO L124 PetriNetUnfolderBase]: 3/55 cut-off events. [2023-08-26 15:33:08,177 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-26 15:33:08,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 152 conditions, 55 events. 3/55 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 165 event pairs, 0 based on Foata normal form. 12/60 useless extension candidates. Maximal degree in co-relation 144. Up to 43 conditions per place. [2023-08-26 15:33:08,178 INFO L140 encePairwiseOnDemand]: 209/215 looper letters, 19 selfloop transitions, 6 changer transitions 0/25 dead transitions. [2023-08-26 15:33:08,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 25 transitions, 143 flow [2023-08-26 15:33:08,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:33:08,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:33:08,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 263 transitions. [2023-08-26 15:33:08,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4077519379844961 [2023-08-26 15:33:08,179 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 263 transitions. [2023-08-26 15:33:08,179 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 263 transitions. [2023-08-26 15:33:08,179 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:33:08,179 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 263 transitions. [2023-08-26 15:33:08,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 87.66666666666667) internal successors, (263), 3 states have internal predecessors, (263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:08,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 215.0) internal successors, (860), 4 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:08,182 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 215.0) internal successors, (860), 4 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:08,182 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 120 flow. Second operand 3 states and 263 transitions. [2023-08-26 15:33:08,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 25 transitions, 143 flow [2023-08-26 15:33:08,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 25 transitions, 131 flow, removed 3 selfloop flow, removed 3 redundant places. [2023-08-26 15:33:08,184 INFO L231 Difference]: Finished difference. Result has 33 places, 25 transitions, 93 flow [2023-08-26 15:33:08,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=215, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=33, PETRI_TRANSITIONS=25} [2023-08-26 15:33:08,185 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 2 predicate places. [2023-08-26 15:33:08,186 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 25 transitions, 93 flow [2023-08-26 15:33:08,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:08,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:33:08,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:33:08,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 15:33:08,186 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr1ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 15:33:08,186 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:33:08,187 INFO L85 PathProgramCache]: Analyzing trace with hash -297573716, now seen corresponding path program 1 times [2023-08-26 15:33:08,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:33:08,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794755871] [2023-08-26 15:33:08,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:33:08,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:33:08,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:33:08,245 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 15:33:08,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:33:08,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794755871] [2023-08-26 15:33:08,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794755871] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:33:08,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:33:08,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 15:33:08,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036939397] [2023-08-26 15:33:08,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:33:08,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 15:33:08,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:33:08,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 15:33:08,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 15:33:08,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 71 out of 215 [2023-08-26 15:33:08,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 25 transitions, 93 flow. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:08,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:33:08,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 71 of 215 [2023-08-26 15:33:08,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:33:08,309 INFO L124 PetriNetUnfolderBase]: 3/51 cut-off events. [2023-08-26 15:33:08,310 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:33:08,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148 conditions, 51 events. 3/51 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 144 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 141. Up to 26 conditions per place. [2023-08-26 15:33:08,310 INFO L140 encePairwiseOnDemand]: 212/215 looper letters, 26 selfloop transitions, 3 changer transitions 1/30 dead transitions. [2023-08-26 15:33:08,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 30 transitions, 171 flow [2023-08-26 15:33:08,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 15:33:08,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 15:33:08,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 314 transitions. [2023-08-26 15:33:08,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36511627906976746 [2023-08-26 15:33:08,317 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 314 transitions. [2023-08-26 15:33:08,317 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 314 transitions. [2023-08-26 15:33:08,317 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:33:08,318 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 314 transitions. [2023-08-26 15:33:08,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 78.5) internal successors, (314), 4 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 15:33:08,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 215.0) internal successors, (1075), 5 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:08,320 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 215.0) internal successors, (1075), 5 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:08,320 INFO L175 Difference]: Start difference. First operand has 33 places, 25 transitions, 93 flow. Second operand 4 states and 314 transitions. [2023-08-26 15:33:08,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 30 transitions, 171 flow [2023-08-26 15:33:08,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 30 transitions, 161 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:33:08,322 INFO L231 Difference]: Finished difference. Result has 34 places, 24 transitions, 91 flow [2023-08-26 15:33:08,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=215, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=91, PETRI_PLACES=34, PETRI_TRANSITIONS=24} [2023-08-26 15:33:08,323 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 3 predicate places. [2023-08-26 15:33:08,323 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 24 transitions, 91 flow [2023-08-26 15:33:08,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 4 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:08,324 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:33:08,324 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:33:08,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 15:33:08,324 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 15:33:08,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:33:08,325 INFO L85 PathProgramCache]: Analyzing trace with hash -73759795, now seen corresponding path program 1 times [2023-08-26 15:33:08,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:33:08,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077795183] [2023-08-26 15:33:08,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:33:08,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:33:08,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:33:08,400 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 15:33:08,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:33:08,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077795183] [2023-08-26 15:33:08,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077795183] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:33:08,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:33:08,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:33:08,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062441429] [2023-08-26 15:33:08,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:33:08,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:33:08,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:33:08,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:33:08,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:33:08,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 215 [2023-08-26 15:33:08,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 24 transitions, 91 flow. Second operand has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:08,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:33:08,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 215 [2023-08-26 15:33:08,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:33:08,439 INFO L124 PetriNetUnfolderBase]: 2/41 cut-off events. [2023-08-26 15:33:08,439 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-26 15:33:08,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123 conditions, 41 events. 2/41 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 83 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 115. Up to 41 conditions per place. [2023-08-26 15:33:08,448 INFO L140 encePairwiseOnDemand]: 213/215 looper letters, 22 selfloop transitions, 1 changer transitions 0/23 dead transitions. [2023-08-26 15:33:08,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 23 transitions, 134 flow [2023-08-26 15:33:08,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:33:08,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:33:08,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 251 transitions. [2023-08-26 15:33:08,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3891472868217054 [2023-08-26 15:33:08,450 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 251 transitions. [2023-08-26 15:33:08,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 251 transitions. [2023-08-26 15:33:08,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:33:08,450 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 251 transitions. [2023-08-26 15:33:08,450 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 83.66666666666667) internal successors, (251), 3 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:08,451 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 215.0) internal successors, (860), 4 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:08,451 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 215.0) internal successors, (860), 4 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:08,451 INFO L175 Difference]: Start difference. First operand has 34 places, 24 transitions, 91 flow. Second operand 3 states and 251 transitions. [2023-08-26 15:33:08,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 23 transitions, 134 flow [2023-08-26 15:33:08,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 23 transitions, 129 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:33:08,452 INFO L231 Difference]: Finished difference. Result has 33 places, 23 transitions, 85 flow [2023-08-26 15:33:08,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=215, PETRI_DIFFERENCE_MINUEND_FLOW=83, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=33, PETRI_TRANSITIONS=23} [2023-08-26 15:33:08,453 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 2 predicate places. [2023-08-26 15:33:08,453 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 23 transitions, 85 flow [2023-08-26 15:33:08,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:08,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:33:08,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:33:08,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 15:33:08,453 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 15:33:08,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:33:08,454 INFO L85 PathProgramCache]: Analyzing trace with hash -73759796, now seen corresponding path program 1 times [2023-08-26 15:33:08,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:33:08,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196716114] [2023-08-26 15:33:08,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:33:08,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:33:08,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:33:08,511 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 15:33:08,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:33:08,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196716114] [2023-08-26 15:33:08,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196716114] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:33:08,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:33:08,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:33:08,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788621159] [2023-08-26 15:33:08,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:33:08,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:33:08,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:33:08,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:33:08,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:33:08,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 215 [2023-08-26 15:33:08,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 23 transitions, 85 flow. Second operand has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:08,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:33:08,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 215 [2023-08-26 15:33:08,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:33:08,539 INFO L124 PetriNetUnfolderBase]: 1/31 cut-off events. [2023-08-26 15:33:08,539 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:33:08,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 31 events. 1/31 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 38 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 86. Up to 31 conditions per place. [2023-08-26 15:33:08,540 INFO L140 encePairwiseOnDemand]: 213/215 looper letters, 18 selfloop transitions, 1 changer transitions 3/22 dead transitions. [2023-08-26 15:33:08,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 22 transitions, 126 flow [2023-08-26 15:33:08,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:33:08,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:33:08,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 247 transitions. [2023-08-26 15:33:08,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3829457364341085 [2023-08-26 15:33:08,541 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 247 transitions. [2023-08-26 15:33:08,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 247 transitions. [2023-08-26 15:33:08,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:33:08,541 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 247 transitions. [2023-08-26 15:33:08,541 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:08,542 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 215.0) internal successors, (860), 4 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:08,542 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 215.0) internal successors, (860), 4 states have internal predecessors, (860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:08,542 INFO L175 Difference]: Start difference. First operand has 33 places, 23 transitions, 85 flow. Second operand 3 states and 247 transitions. [2023-08-26 15:33:08,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 22 transitions, 126 flow [2023-08-26 15:33:08,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 22 transitions, 125 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:33:08,543 INFO L231 Difference]: Finished difference. Result has 33 places, 19 transitions, 71 flow [2023-08-26 15:33:08,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=215, PETRI_DIFFERENCE_MINUEND_FLOW=81, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=33, PETRI_TRANSITIONS=19} [2023-08-26 15:33:08,544 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 2 predicate places. [2023-08-26 15:33:08,544 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 19 transitions, 71 flow [2023-08-26 15:33:08,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:08,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:33:08,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:33:08,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 15:33:08,544 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 15:33:08,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:33:08,544 INFO L85 PathProgramCache]: Analyzing trace with hash 2131290186, now seen corresponding path program 1 times [2023-08-26 15:33:08,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:33:08,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710743239] [2023-08-26 15:33:08,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:33:08,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:33:08,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:33:08,647 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 15:33:08,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:33:08,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710743239] [2023-08-26 15:33:08,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710743239] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:33:08,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:33:08,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 15:33:08,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859913697] [2023-08-26 15:33:08,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:33:08,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 15:33:08,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:33:08,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 15:33:08,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-26 15:33:08,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 215 [2023-08-26 15:33:08,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 19 transitions, 71 flow. Second operand has 6 states, 6 states have (on average 77.83333333333333) internal successors, (467), 6 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:08,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:33:08,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 215 [2023-08-26 15:33:08,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:33:08,699 INFO L124 PetriNetUnfolderBase]: 0/23 cut-off events. [2023-08-26 15:33:08,699 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:33:08,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72 conditions, 23 events. 0/23 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 18 event pairs, 0 based on Foata normal form. 1/24 useless extension candidates. Maximal degree in co-relation 0. Up to 11 conditions per place. [2023-08-26 15:33:08,700 INFO L140 encePairwiseOnDemand]: 208/215 looper letters, 10 selfloop transitions, 2 changer transitions 9/21 dead transitions. [2023-08-26 15:33:08,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 21 transitions, 116 flow [2023-08-26 15:33:08,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 15:33:08,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 15:33:08,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 478 transitions. [2023-08-26 15:33:08,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3705426356589147 [2023-08-26 15:33:08,701 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 478 transitions. [2023-08-26 15:33:08,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 478 transitions. [2023-08-26 15:33:08,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:33:08,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 478 transitions. [2023-08-26 15:33:08,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 79.66666666666667) internal successors, (478), 6 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:08,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 215.0) internal successors, (1505), 7 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:08,704 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 215.0) internal successors, (1505), 7 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:08,704 INFO L175 Difference]: Start difference. First operand has 33 places, 19 transitions, 71 flow. Second operand 6 states and 478 transitions. [2023-08-26 15:33:08,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 21 transitions, 116 flow [2023-08-26 15:33:08,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 21 transitions, 115 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:33:08,705 INFO L231 Difference]: Finished difference. Result has 35 places, 12 transitions, 48 flow [2023-08-26 15:33:08,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=215, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=48, PETRI_PLACES=35, PETRI_TRANSITIONS=12} [2023-08-26 15:33:08,706 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 4 predicate places. [2023-08-26 15:33:08,706 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 12 transitions, 48 flow [2023-08-26 15:33:08,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 77.83333333333333) internal successors, (467), 6 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:08,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:33:08,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:33:08,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 15:33:08,707 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-08-26 15:33:08,710 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:33:08,711 INFO L85 PathProgramCache]: Analyzing trace with hash 696191108, now seen corresponding path program 1 times [2023-08-26 15:33:08,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:33:08,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317391050] [2023-08-26 15:33:08,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:33:08,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:33:08,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:33:08,810 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 15:33:08,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:33:08,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317391050] [2023-08-26 15:33:08,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317391050] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:33:08,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:33:08,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-26 15:33:08,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703713145] [2023-08-26 15:33:08,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:33:08,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-08-26 15:33:08,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:33:08,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-08-26 15:33:08,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-08-26 15:33:08,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 215 [2023-08-26 15:33:08,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 12 transitions, 48 flow. Second operand has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:08,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:33:08,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 215 [2023-08-26 15:33:08,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:33:08,855 INFO L124 PetriNetUnfolderBase]: 0/12 cut-off events. [2023-08-26 15:33:08,855 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 15:33:08,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 12 events. 0/12 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 1 event pairs, 0 based on Foata normal form. 1/13 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2023-08-26 15:33:08,855 INFO L140 encePairwiseOnDemand]: 208/215 looper letters, 0 selfloop transitions, 0 changer transitions 12/12 dead transitions. [2023-08-26 15:33:08,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 12 transitions, 71 flow [2023-08-26 15:33:08,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 15:33:08,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 15:33:08,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 538 transitions. [2023-08-26 15:33:08,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3574750830564784 [2023-08-26 15:33:08,857 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 538 transitions. [2023-08-26 15:33:08,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 538 transitions. [2023-08-26 15:33:08,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:33:08,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 538 transitions. [2023-08-26 15:33:08,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 76.85714285714286) internal successors, (538), 7 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:08,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 215.0) internal successors, (1720), 8 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:08,865 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 215.0) internal successors, (1720), 8 states have internal predecessors, (1720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:08,865 INFO L175 Difference]: Start difference. First operand has 35 places, 12 transitions, 48 flow. Second operand 7 states and 538 transitions. [2023-08-26 15:33:08,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 12 transitions, 71 flow [2023-08-26 15:33:08,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 12 transitions, 61 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-08-26 15:33:08,866 INFO L231 Difference]: Finished difference. Result has 27 places, 0 transitions, 0 flow [2023-08-26 15:33:08,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=215, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=0, PETRI_PLACES=27, PETRI_TRANSITIONS=0} [2023-08-26 15:33:08,866 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, -4 predicate places. [2023-08-26 15:33:08,866 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 0 transitions, 0 flow [2023-08-26 15:33:08,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 77.0) internal successors, (462), 6 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:33:08,868 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (10 of 11 remaining) [2023-08-26 15:33:08,870 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 11 remaining) [2023-08-26 15:33:08,870 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2023-08-26 15:33:08,870 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONASSERT (7 of 11 remaining) [2023-08-26 15:33:08,870 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 11 remaining) [2023-08-26 15:33:08,872 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 11 remaining) [2023-08-26 15:33:08,874 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 11 remaining) [2023-08-26 15:33:08,875 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONASSERT (3 of 11 remaining) [2023-08-26 15:33:08,875 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1ASSERT_VIOLATIONASSERT (2 of 11 remaining) [2023-08-26 15:33:08,875 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0ASSERT_VIOLATIONASSERT (1 of 11 remaining) [2023-08-26 15:33:08,875 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1ASSERT_VIOLATIONASSERT (0 of 11 remaining) [2023-08-26 15:33:08,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 15:33:08,875 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:33:08,879 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 15:33:08,879 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 15:33:08,882 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 03:33:08 BasicIcfg [2023-08-26 15:33:08,882 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 15:33:08,883 INFO L158 Benchmark]: Toolchain (without parser) took 4576.75ms. Allocated memory was 402.7MB in the beginning and 530.6MB in the end (delta: 127.9MB). Free memory was 377.6MB in the beginning and 427.9MB in the end (delta: -50.3MB). Peak memory consumption was 78.6MB. Max. memory is 16.0GB. [2023-08-26 15:33:08,883 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 402.7MB. Free memory is still 378.9MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 15:33:08,883 INFO L158 Benchmark]: CACSL2BoogieTranslator took 389.41ms. Allocated memory is still 402.7MB. Free memory was 377.6MB in the beginning and 358.5MB in the end (delta: 19.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-26 15:33:08,883 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.53ms. Allocated memory is still 402.7MB. Free memory was 358.5MB in the beginning and 356.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 15:33:08,883 INFO L158 Benchmark]: Boogie Preprocessor took 17.95ms. Allocated memory is still 402.7MB. Free memory was 356.4MB in the beginning and 354.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 15:33:08,884 INFO L158 Benchmark]: RCFGBuilder took 358.37ms. Allocated memory is still 402.7MB. Free memory was 354.8MB in the beginning and 341.1MB in the end (delta: 13.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-26 15:33:08,884 INFO L158 Benchmark]: TraceAbstraction took 3777.67ms. Allocated memory was 402.7MB in the beginning and 530.6MB in the end (delta: 127.9MB). Free memory was 340.5MB in the beginning and 427.9MB in the end (delta: -87.4MB). Peak memory consumption was 40.9MB. Max. memory is 16.0GB. [2023-08-26 15:33:08,887 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 402.7MB. Free memory is still 378.9MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 389.41ms. Allocated memory is still 402.7MB. Free memory was 377.6MB in the beginning and 358.5MB in the end (delta: 19.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 29.53ms. Allocated memory is still 402.7MB. Free memory was 358.5MB in the beginning and 356.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 17.95ms. Allocated memory is still 402.7MB. Free memory was 356.4MB in the beginning and 354.8MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 358.37ms. Allocated memory is still 402.7MB. Free memory was 354.8MB in the beginning and 341.1MB in the end (delta: 13.7MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 3777.67ms. Allocated memory was 402.7MB in the beginning and 530.6MB in the end (delta: 127.9MB). Free memory was 340.5MB in the beginning and 427.9MB in the end (delta: -87.4MB). Peak memory consumption was 40.9MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 231]: Unsoundness Warning unspecified type, defaulting to int C: short [231] - GenericResultAtLocation [Line: 232]: Unsoundness Warning unspecified type, defaulting to int C: short [232] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.1s, 92 PlacesBefore, 31 PlacesAfterwards, 96 TransitionsBefore, 31 TransitionsAfterwards, 1768 CoEnabledTransitionPairs, 6 FixpointIterations, 41 TrivialSequentialCompositions, 52 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 10 ConcurrentYvCompositions, 4 ChoiceCompositions, 111 TotalNumberOfCompositions, 4691 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2494, independent: 2283, independent conditional: 0, independent unconditional: 2283, dependent: 211, dependent conditional: 0, dependent unconditional: 211, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1178, independent: 1134, independent conditional: 0, independent unconditional: 1134, dependent: 44, dependent conditional: 0, dependent unconditional: 44, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2494, independent: 1149, independent conditional: 0, independent unconditional: 1149, dependent: 167, dependent conditional: 0, dependent unconditional: 167, unknown: 1178, unknown conditional: 0, unknown unconditional: 1178] , Statistics on independence cache: Total cache size (in pairs): 90, Positive cache size: 69, Positive conditional cache size: 0, Positive unconditional cache size: 69, Negative cache size: 21, Negative conditional cache size: 0, Negative unconditional cache size: 21, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 18]: assertion always holds For all program executions holds that assertion always holds 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: -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 - 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 - 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, 129 locations, 11 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: 3.7s, OverallIterations: 9, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.2s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 79 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 79 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 433 IncrementalHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 0 mSDtfsCounter, 433 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=120occurred in iteration=3, InterpolantAutomatonStates: 37, 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, 0.6s InterpolantComputationTime, 66 NumberOfCodeBlocks, 66 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 57 ConstructedInterpolants, 0 QuantifiedInterpolants, 340 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 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 8 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 15:33:08,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...