/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 PROGRAM_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/ldv-races/race-1_1-join.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 18:30:13,853 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 18:30:13,913 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 18:30:13,917 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 18:30:13,917 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 18:30:13,945 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 18:30:13,945 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 18:30:13,946 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 18:30:13,946 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 18:30:13,947 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 18:30:13,947 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 18:30:13,947 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 18:30:13,947 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 18:30:13,948 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 18:30:13,948 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 18:30:13,948 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 18:30:13,949 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 18:30:13,949 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 18:30:13,949 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 18:30:13,949 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 18:30:13,950 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 18:30:13,952 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 18:30:13,952 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 18:30:13,953 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 18:30:13,953 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 18:30:13,953 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 18:30:13,953 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 18:30:13,953 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:30:13,954 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 18:30:13,954 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 18:30:13,954 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 18:30:13,954 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 18:30:13,954 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 18:30:13,955 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 18:30:13,955 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 18:30:13,955 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 18:30:14,253 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 18:30:14,271 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 18:30:14,274 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 18:30:14,275 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 18:30:14,276 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 18:30:14,281 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-races/race-1_1-join.i [2023-08-26 18:30:15,438 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 18:30:15,762 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 18:30:15,762 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-races/race-1_1-join.i [2023-08-26 18:30:15,784 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/caf61601b/8e90e5b02b6a41a49888313370a2aeda/FLAGe1dd343d9 [2023-08-26 18:30:15,801 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/caf61601b/8e90e5b02b6a41a49888313370a2aeda [2023-08-26 18:30:15,804 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 18:30:15,805 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 18:30:15,806 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 18:30:15,806 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 18:30:15,813 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 18:30:15,814 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:30:15" (1/1) ... [2023-08-26 18:30:15,815 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4dbb5e52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:15, skipping insertion in model container [2023-08-26 18:30:15,815 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 06:30:15" (1/1) ... [2023-08-26 18:30:15,873 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 18:30:16,692 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:30:16,710 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 18:30:16,732 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [237] [2023-08-26 18:30:16,734 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [237] [2023-08-26 18:30:16,740 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [729] [2023-08-26 18:30:16,773 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 18:30:16,902 INFO L206 MainTranslator]: Completed translation [2023-08-26 18:30:16,902 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:16 WrapperNode [2023-08-26 18:30:16,902 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 18:30:16,904 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 18:30:16,904 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 18:30:16,904 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 18:30:16,910 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:16" (1/1) ... [2023-08-26 18:30:16,960 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:16" (1/1) ... [2023-08-26 18:30:16,997 INFO L138 Inliner]: procedures = 480, calls = 28, calls flagged for inlining = 9, calls inlined = 12, statements flattened = 104 [2023-08-26 18:30:16,997 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 18:30:16,999 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 18:30:16,999 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 18:30:16,999 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 18:30:17,007 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:16" (1/1) ... [2023-08-26 18:30:17,008 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:16" (1/1) ... [2023-08-26 18:30:17,017 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:16" (1/1) ... [2023-08-26 18:30:17,018 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:16" (1/1) ... [2023-08-26 18:30:17,033 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:16" (1/1) ... [2023-08-26 18:30:17,035 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:16" (1/1) ... [2023-08-26 18:30:17,049 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:16" (1/1) ... [2023-08-26 18:30:17,051 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:16" (1/1) ... [2023-08-26 18:30:17,058 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 18:30:17,059 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 18:30:17,059 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 18:30:17,059 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 18:30:17,060 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:16" (1/1) ... [2023-08-26 18:30:17,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 18:30:17,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 18:30:17,107 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 18:30:17,128 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 18:30:17,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 18:30:17,147 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 18:30:17,147 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 18:30:17,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 18:30:17,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-08-26 18:30:17,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 18:30:17,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 18:30:17,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 18:30:17,148 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-26 18:30:17,148 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-26 18:30:17,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 18:30:17,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-26 18:30:17,150 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 18:30:17,403 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 18:30:17,405 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 18:30:17,597 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 18:30:17,604 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 18:30:17,604 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-08-26 18:30:17,606 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:30:17 BoogieIcfgContainer [2023-08-26 18:30:17,606 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 18:30:17,608 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 18:30:17,608 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 18:30:17,611 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 18:30:17,611 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 06:30:15" (1/3) ... [2023-08-26 18:30:17,612 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f7f772 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:30:17, skipping insertion in model container [2023-08-26 18:30:17,612 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 06:30:16" (2/3) ... [2023-08-26 18:30:17,612 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f7f772 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 06:30:17, skipping insertion in model container [2023-08-26 18:30:17,612 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 06:30:17" (3/3) ... [2023-08-26 18:30:17,614 INFO L112 eAbstractionObserver]: Analyzing ICFG race-1_1-join.i [2023-08-26 18:30:17,629 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 18:30:17,630 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-08-26 18:30:17,630 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 18:30:17,689 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2023-08-26 18:30:17,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 116 places, 122 transitions, 252 flow [2023-08-26 18:30:17,788 INFO L124 PetriNetUnfolderBase]: 9/135 cut-off events. [2023-08-26 18:30:17,789 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 18:30:17,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 140 conditions, 135 events. 9/135 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 275 event pairs, 0 based on Foata normal form. 0/112 useless extension candidates. Maximal degree in co-relation 75. Up to 3 conditions per place. [2023-08-26 18:30:17,796 INFO L82 GeneralOperation]: Start removeDead. Operand has 116 places, 122 transitions, 252 flow [2023-08-26 18:30:17,801 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 109 places, 112 transitions, 230 flow [2023-08-26 18:30:17,804 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 18:30:17,812 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 112 transitions, 230 flow [2023-08-26 18:30:17,815 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 112 transitions, 230 flow [2023-08-26 18:30:17,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 112 transitions, 230 flow [2023-08-26 18:30:17,852 INFO L124 PetriNetUnfolderBase]: 6/126 cut-off events. [2023-08-26 18:30:17,852 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 18:30:17,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 126 events. 6/126 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 258 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 75. Up to 2 conditions per place. [2023-08-26 18:30:17,854 INFO L119 LiptonReduction]: Number of co-enabled transitions 646 [2023-08-26 18:30:22,091 INFO L134 LiptonReduction]: Checked pairs total: 615 [2023-08-26 18:30:22,092 INFO L136 LiptonReduction]: Total number of compositions: 152 [2023-08-26 18:30:22,105 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 18:30:22,111 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;@389a322d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 18:30:22,111 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2023-08-26 18:30:22,112 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 18:30:22,112 INFO L124 PetriNetUnfolderBase]: 0/0 cut-off events. [2023-08-26 18:30:22,112 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:30:22,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:30:22,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-08-26 18:30:22,113 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [thread1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-26 18:30:22,118 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:30:22,118 INFO L85 PathProgramCache]: Analyzing trace with hash 487, now seen corresponding path program 1 times [2023-08-26 18:30:22,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:30:22,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210560665] [2023-08-26 18:30:22,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:30:22,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:30:22,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:30:22,334 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 18:30:22,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:30:22,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210560665] [2023-08-26 18:30:22,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210560665] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:30:22,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:30:22,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-08-26 18:30:22,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710937040] [2023-08-26 18:30:22,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:30:22,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 18:30:22,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:30:22,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 18:30:22,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 18:30:22,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 274 [2023-08-26 18:30:22,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 18 transitions, 42 flow. Second operand has 2 states, 2 states have (on average 108.5) internal successors, (217), 2 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:22,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:30:22,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 274 [2023-08-26 18:30:22,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:30:22,426 INFO L124 PetriNetUnfolderBase]: 5/26 cut-off events. [2023-08-26 18:30:22,426 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 18:30:22,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56 conditions, 26 events. 5/26 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 53 event pairs, 5 based on Foata normal form. 1/16 useless extension candidates. Maximal degree in co-relation 32. Up to 25 conditions per place. [2023-08-26 18:30:22,428 INFO L140 encePairwiseOnDemand]: 268/274 looper letters, 9 selfloop transitions, 0 changer transitions 1/12 dead transitions. [2023-08-26 18:30:22,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 16 places, 12 transitions, 50 flow [2023-08-26 18:30:22,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 18:30:22,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 18:30:22,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 232 transitions. [2023-08-26 18:30:22,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4233576642335766 [2023-08-26 18:30:22,448 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 232 transitions. [2023-08-26 18:30:22,449 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 232 transitions. [2023-08-26 18:30:22,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:30:22,453 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 232 transitions. [2023-08-26 18:30:22,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 116.0) internal successors, (232), 2 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:22,463 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 274.0) internal successors, (822), 3 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:22,464 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 274.0) internal successors, (822), 3 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:22,466 INFO L175 Difference]: Start difference. First operand has 21 places, 18 transitions, 42 flow. Second operand 2 states and 232 transitions. [2023-08-26 18:30:22,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 16 places, 12 transitions, 50 flow [2023-08-26 18:30:22,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 14 places, 12 transitions, 46 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 18:30:22,470 INFO L231 Difference]: Finished difference. Result has 14 places, 11 transitions, 24 flow [2023-08-26 18:30:22,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=13, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=12, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=24, PETRI_PLACES=14, PETRI_TRANSITIONS=11} [2023-08-26 18:30:22,474 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -7 predicate places. [2023-08-26 18:30:22,474 INFO L495 AbstractCegarLoop]: Abstraction has has 14 places, 11 transitions, 24 flow [2023-08-26 18:30:22,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 108.5) internal successors, (217), 2 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:22,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:30:22,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 18:30:22,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 18:30:22,476 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-26 18:30:22,476 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:30:22,476 INFO L85 PathProgramCache]: Analyzing trace with hash 15700, now seen corresponding path program 1 times [2023-08-26 18:30:22,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:30:22,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416641979] [2023-08-26 18:30:22,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:30:22,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:30:22,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:30:22,696 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 18:30:22,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:30:22,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416641979] [2023-08-26 18:30:22,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416641979] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:30:22,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:30:22,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:30:22,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133102798] [2023-08-26 18:30:22,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:30:22,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:30:22,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:30:22,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:30:22,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:30:22,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 274 [2023-08-26 18:30:22,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 11 transitions, 24 flow. Second operand has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:22,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:30:22,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 274 [2023-08-26 18:30:22,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:30:22,735 INFO L124 PetriNetUnfolderBase]: 4/19 cut-off events. [2023-08-26 18:30:22,735 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:30:22,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 19 events. 4/19 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 30 event pairs, 4 based on Foata normal form. 1/14 useless extension candidates. Maximal degree in co-relation 37. Up to 17 conditions per place. [2023-08-26 18:30:22,737 INFO L140 encePairwiseOnDemand]: 270/274 looper letters, 8 selfloop transitions, 0 changer transitions 1/11 dead transitions. [2023-08-26 18:30:22,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 15 places, 11 transitions, 42 flow [2023-08-26 18:30:22,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:30:22,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:30:22,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 315 transitions. [2023-08-26 18:30:22,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38321167883211676 [2023-08-26 18:30:22,740 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 315 transitions. [2023-08-26 18:30:22,741 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 315 transitions. [2023-08-26 18:30:22,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:30:22,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 315 transitions. [2023-08-26 18:30:22,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.0) internal successors, (315), 3 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:22,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:22,744 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:22,745 INFO L175 Difference]: Start difference. First operand has 14 places, 11 transitions, 24 flow. Second operand 3 states and 315 transitions. [2023-08-26 18:30:22,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 15 places, 11 transitions, 42 flow [2023-08-26 18:30:22,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 15 places, 11 transitions, 42 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 18:30:22,746 INFO L231 Difference]: Finished difference. Result has 16 places, 10 transitions, 28 flow [2023-08-26 18:30:22,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=24, PETRI_DIFFERENCE_MINUEND_PLACES=13, 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=3, PETRI_FLOW=28, PETRI_PLACES=16, PETRI_TRANSITIONS=10} [2023-08-26 18:30:22,747 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -5 predicate places. [2023-08-26 18:30:22,747 INFO L495 AbstractCegarLoop]: Abstraction has has 16 places, 10 transitions, 28 flow [2023-08-26 18:30:22,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:22,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:30:22,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 18:30:22,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 18:30:22,751 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-26 18:30:22,754 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:30:22,754 INFO L85 PathProgramCache]: Analyzing trace with hash 15030457, now seen corresponding path program 1 times [2023-08-26 18:30:22,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:30:22,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956061646] [2023-08-26 18:30:22,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:30:22,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:30:22,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:30:22,979 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 18:30:22,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:30:22,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956061646] [2023-08-26 18:30:22,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956061646] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:30:22,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:30:22,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 18:30:22,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181055110] [2023-08-26 18:30:22,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:30:22,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:30:22,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:30:22,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:30:22,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:30:22,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 274 [2023-08-26 18:30:22,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 16 places, 10 transitions, 28 flow. Second operand has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:22,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:30:22,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 274 [2023-08-26 18:30:22,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:30:23,007 INFO L124 PetriNetUnfolderBase]: 2/12 cut-off events. [2023-08-26 18:30:23,008 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 18:30:23,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32 conditions, 12 events. 2/12 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 8 event pairs, 2 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 27. Up to 12 conditions per place. [2023-08-26 18:30:23,009 INFO L140 encePairwiseOnDemand]: 271/274 looper letters, 7 selfloop transitions, 1 changer transitions 0/8 dead transitions. [2023-08-26 18:30:23,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 15 places, 8 transitions, 36 flow [2023-08-26 18:30:23,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:30:23,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:30:23,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 280 transitions. [2023-08-26 18:30:23,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.340632603406326 [2023-08-26 18:30:23,012 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 280 transitions. [2023-08-26 18:30:23,012 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 280 transitions. [2023-08-26 18:30:23,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:30:23,012 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 280 transitions. [2023-08-26 18:30:23,013 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:23,016 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:23,017 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:23,017 INFO L175 Difference]: Start difference. First operand has 16 places, 10 transitions, 28 flow. Second operand 3 states and 280 transitions. [2023-08-26 18:30:23,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 15 places, 8 transitions, 36 flow [2023-08-26 18:30:23,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 14 places, 8 transitions, 34 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-26 18:30:23,018 INFO L231 Difference]: Finished difference. Result has 14 places, 8 transitions, 20 flow [2023-08-26 18:30:23,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=18, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=20, PETRI_PLACES=14, PETRI_TRANSITIONS=8} [2023-08-26 18:30:23,019 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -7 predicate places. [2023-08-26 18:30:23,022 INFO L495 AbstractCegarLoop]: Abstraction has has 14 places, 8 transitions, 20 flow [2023-08-26 18:30:23,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:23,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:30:23,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:30:23,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-26 18:30:23,023 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-26 18:30:23,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:30:23,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1097078064, now seen corresponding path program 1 times [2023-08-26 18:30:23,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:30:23,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87665560] [2023-08-26 18:30:23,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:30:23,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:30:23,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:30:23,130 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 18:30:23,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:30:23,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87665560] [2023-08-26 18:30:23,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87665560] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:30:23,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:30:23,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:30:23,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095695352] [2023-08-26 18:30:23,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:30:23,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:30:23,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:30:23,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:30:23,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:30:23,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 274 [2023-08-26 18:30:23,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 8 transitions, 20 flow. Second operand has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:23,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:30:23,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 274 [2023-08-26 18:30:23,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:30:23,152 INFO L124 PetriNetUnfolderBase]: 2/11 cut-off events. [2023-08-26 18:30:23,152 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 18:30:23,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 11 events. 2/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 7 event pairs, 1 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 24. Up to 7 conditions per place. [2023-08-26 18:30:23,153 INFO L140 encePairwiseOnDemand]: 272/274 looper letters, 7 selfloop transitions, 1 changer transitions 0/8 dead transitions. [2023-08-26 18:30:23,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 15 places, 8 transitions, 36 flow [2023-08-26 18:30:23,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:30:23,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:30:23,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 285 transitions. [2023-08-26 18:30:23,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3467153284671533 [2023-08-26 18:30:23,154 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 285 transitions. [2023-08-26 18:30:23,154 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 285 transitions. [2023-08-26 18:30:23,155 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:30:23,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 285 transitions. [2023-08-26 18:30:23,155 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:23,157 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:23,157 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:23,157 INFO L175 Difference]: Start difference. First operand has 14 places, 8 transitions, 20 flow. Second operand 3 states and 285 transitions. [2023-08-26 18:30:23,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 15 places, 8 transitions, 36 flow [2023-08-26 18:30:23,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 14 places, 8 transitions, 35 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:30:23,158 INFO L231 Difference]: Finished difference. Result has 14 places, 7 transitions, 19 flow [2023-08-26 18:30:23,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=19, PETRI_PLACES=14, PETRI_TRANSITIONS=7} [2023-08-26 18:30:23,159 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -7 predicate places. [2023-08-26 18:30:23,159 INFO L495 AbstractCegarLoop]: Abstraction has has 14 places, 7 transitions, 19 flow [2023-08-26 18:30:23,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.33333333333333) internal successors, (283), 3 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:23,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 18:30:23,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-26 18:30:23,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-26 18:30:23,160 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2023-08-26 18:30:23,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 18:30:23,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1097078065, now seen corresponding path program 1 times [2023-08-26 18:30:23,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 18:30:23,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199109738] [2023-08-26 18:30:23,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 18:30:23,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 18:30:23,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 18:30:23,252 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 18:30:23,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 18:30:23,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199109738] [2023-08-26 18:30:23,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199109738] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 18:30:23,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 18:30:23,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 18:30:23,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810683912] [2023-08-26 18:30:23,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 18:30:23,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 18:30:23,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 18:30:23,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 18:30:23,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 18:30:23,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 274 [2023-08-26 18:30:23,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 7 transitions, 19 flow. Second operand has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:23,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 18:30:23,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 274 [2023-08-26 18:30:23,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 18:30:23,273 INFO L124 PetriNetUnfolderBase]: 2/10 cut-off events. [2023-08-26 18:30:23,273 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-26 18:30:23,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 10 events. 2/10 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 7 event pairs, 1 based on Foata normal form. 1/11 useless extension candidates. Maximal degree in co-relation 24. Up to 7 conditions per place. [2023-08-26 18:30:23,275 INFO L140 encePairwiseOnDemand]: 272/274 looper letters, 0 selfloop transitions, 0 changer transitions 7/7 dead transitions. [2023-08-26 18:30:23,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 15 places, 7 transitions, 33 flow [2023-08-26 18:30:23,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 18:30:23,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 18:30:23,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 287 transitions. [2023-08-26 18:30:23,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3491484184914842 [2023-08-26 18:30:23,276 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 287 transitions. [2023-08-26 18:30:23,276 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 287 transitions. [2023-08-26 18:30:23,277 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 18:30:23,277 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 287 transitions. [2023-08-26 18:30:23,277 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 95.66666666666667) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:23,279 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:23,279 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 274.0) internal successors, (1096), 4 states have internal predecessors, (1096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:23,279 INFO L175 Difference]: Start difference. First operand has 14 places, 7 transitions, 19 flow. Second operand 3 states and 287 transitions. [2023-08-26 18:30:23,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 15 places, 7 transitions, 33 flow [2023-08-26 18:30:23,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 14 places, 7 transitions, 32 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 18:30:23,280 INFO L231 Difference]: Finished difference. Result has 14 places, 0 transitions, 0 flow [2023-08-26 18:30:23,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=274, PETRI_DIFFERENCE_MINUEND_FLOW=16, PETRI_DIFFERENCE_MINUEND_PLACES=12, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=0, PETRI_PLACES=14, PETRI_TRANSITIONS=0} [2023-08-26 18:30:23,282 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -7 predicate places. [2023-08-26 18:30:23,282 INFO L495 AbstractCegarLoop]: Abstraction has has 14 places, 0 transitions, 0 flow [2023-08-26 18:30:23,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.33333333333333) internal successors, (286), 3 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 18:30:23,287 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONASSERT (11 of 12 remaining) [2023-08-26 18:30:23,288 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (10 of 12 remaining) [2023-08-26 18:30:23,289 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 12 remaining) [2023-08-26 18:30:23,289 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 12 remaining) [2023-08-26 18:30:23,289 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3ASSERT_VIOLATIONASSERT (7 of 12 remaining) [2023-08-26 18:30:23,289 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 12 remaining) [2023-08-26 18:30:23,289 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 12 remaining) [2023-08-26 18:30:23,289 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 12 remaining) [2023-08-26 18:30:23,290 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 12 remaining) [2023-08-26 18:30:23,293 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONASSERT (2 of 12 remaining) [2023-08-26 18:30:23,293 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 12 remaining) [2023-08-26 18:30:23,293 INFO L805 garLoopResultBuilder]: Registering result SAFE for location thread1Err0ASSERT_VIOLATIONASSERT (0 of 12 remaining) [2023-08-26 18:30:23,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-26 18:30:23,294 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-26 18:30:23,298 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 18:30:23,298 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 18:30:23,302 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 06:30:23 BasicIcfg [2023-08-26 18:30:23,302 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 18:30:23,303 INFO L158 Benchmark]: Toolchain (without parser) took 7497.31ms. Allocated memory was 379.6MB in the beginning and 478.2MB in the end (delta: 98.6MB). Free memory was 335.4MB in the beginning and 289.1MB in the end (delta: 46.3MB). Peak memory consumption was 147.0MB. Max. memory is 16.0GB. [2023-08-26 18:30:23,303 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 379.6MB. Free memory was 357.3MB in the beginning and 357.2MB in the end (delta: 86.2kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 18:30:23,303 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1096.48ms. Allocated memory is still 379.6MB. Free memory was 335.4MB in the beginning and 279.8MB in the end (delta: 55.6MB). Peak memory consumption was 54.5MB. Max. memory is 16.0GB. [2023-08-26 18:30:23,307 INFO L158 Benchmark]: Boogie Procedure Inliner took 94.16ms. Allocated memory is still 379.6MB. Free memory was 279.8MB in the beginning and 276.7MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. [2023-08-26 18:30:23,307 INFO L158 Benchmark]: Boogie Preprocessor took 59.23ms. Allocated memory is still 379.6MB. Free memory was 276.7MB in the beginning and 274.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 18:30:23,308 INFO L158 Benchmark]: RCFGBuilder took 547.72ms. Allocated memory is still 379.6MB. Free memory was 274.6MB in the beginning and 251.5MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. [2023-08-26 18:30:23,308 INFO L158 Benchmark]: TraceAbstraction took 5693.81ms. Allocated memory was 379.6MB in the beginning and 478.2MB in the end (delta: 98.6MB). Free memory was 250.5MB in the beginning and 289.1MB in the end (delta: -38.6MB). Peak memory consumption was 63.1MB. Max. memory is 16.0GB. [2023-08-26 18:30:23,309 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 379.6MB. Free memory was 357.3MB in the beginning and 357.2MB in the end (delta: 86.2kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 1096.48ms. Allocated memory is still 379.6MB. Free memory was 335.4MB in the beginning and 279.8MB in the end (delta: 55.6MB). Peak memory consumption was 54.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 94.16ms. Allocated memory is still 379.6MB. Free memory was 279.8MB in the beginning and 276.7MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.0GB. * Boogie Preprocessor took 59.23ms. Allocated memory is still 379.6MB. Free memory was 276.7MB in the beginning and 274.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 547.72ms. Allocated memory is still 379.6MB. Free memory was 274.6MB in the beginning and 251.5MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.0GB. * TraceAbstraction took 5693.81ms. Allocated memory was 379.6MB in the beginning and 478.2MB in the end (delta: 98.6MB). Free memory was 250.5MB in the beginning and 289.1MB in the end (delta: -38.6MB). Peak memory consumption was 63.1MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 237]: Unsoundness Warning unspecified type, defaulting to int C: short [237] - GenericResultAtLocation [Line: 237]: Unsoundness Warning unspecified type, defaulting to int C: short [237] - GenericResultAtLocation [Line: 729]: Unsoundness Warning unspecified type, defaulting to int C: unsigned short [729] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.3s, 109 PlacesBefore, 21 PlacesAfterwards, 112 TransitionsBefore, 18 TransitionsAfterwards, 646 CoEnabledTransitionPairs, 9 FixpointIterations, 96 TrivialSequentialCompositions, 38 ConcurrentSequentialCompositions, 7 TrivialYvCompositions, 5 ConcurrentYvCompositions, 6 ChoiceCompositions, 152 TotalNumberOfCompositions, 615 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 615, independent: 615, independent conditional: 0, independent unconditional: 615, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 355, independent: 355, independent conditional: 0, independent unconditional: 355, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 615, independent: 260, independent conditional: 0, independent unconditional: 260, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 355, unknown conditional: 0, unknown unconditional: 355] , Statistics on independence cache: Total cache size (in pairs): 6, Positive cache size: 6, Positive conditional cache size: 0, Positive unconditional cache size: 6, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 1691]: assertion always holds For all program executions holds that assertion always holds at this location - PositiveResult [Line: 1691]: 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: 1691]: 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: -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: 1691]: 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, 132 locations, 12 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: 5.6s, OverallIterations: 5, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.4s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 58 IncrementalHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 0 mSDtfsCounter, 58 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=0, InterpolantAutomatonStates: 14, 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, 0.5s InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 91 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 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 10 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-26 18:30:23,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...