/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/06-symbeq_06-tricky_address1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-ac9dbd0-m [2023-08-26 15:30:10,679 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-26 15:30:10,763 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 15:30:10,768 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-26 15:30:10,769 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-26 15:30:10,796 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-26 15:30:10,796 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-26 15:30:10,797 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-26 15:30:10,797 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-26 15:30:10,801 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-26 15:30:10,801 INFO L153 SettingsManager]: * Use SBE=true [2023-08-26 15:30:10,801 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-26 15:30:10,802 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-26 15:30:10,803 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-26 15:30:10,803 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-26 15:30:10,803 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-26 15:30:10,803 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-26 15:30:10,804 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-26 15:30:10,804 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-26 15:30:10,804 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-26 15:30:10,804 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-26 15:30:10,805 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-26 15:30:10,805 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-26 15:30:10,806 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-26 15:30:10,806 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-26 15:30:10,806 INFO L153 SettingsManager]: * To the following directory=./dump/ [2023-08-26 15:30:10,806 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-26 15:30:10,806 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:30:10,807 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-26 15:30:10,807 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-26 15:30:10,807 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-26 15:30:10,807 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-26 15:30:10,807 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-26 15:30:10,808 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-26 15:30:10,808 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-26 15:30:10,808 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer base address is valid at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Pointer to allocated memory at dereference -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check array bounds for arrays that are off heap -> ASSERTandASSUME Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check if freed pointer was valid -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Adapt memory model on pointer casts if necessary -> true [2023-08-26 15:30:11,124 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-26 15:30:11,141 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-26 15:30:11,143 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-26 15:30:11,144 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-26 15:30:11,144 INFO L274 PluginConnector]: CDTParser initialized [2023-08-26 15:30:11,145 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/goblint-regression/06-symbeq_06-tricky_address1.i [2023-08-26 15:30:12,427 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-26 15:30:12,720 INFO L384 CDTParser]: Found 1 translation units. [2023-08-26 15:30:12,720 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/goblint-regression/06-symbeq_06-tricky_address1.i [2023-08-26 15:30:12,737 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12b977b4b/c1962e7ef7f249cab153acf5a1e6fec0/FLAG0707b5cfa [2023-08-26 15:30:12,749 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12b977b4b/c1962e7ef7f249cab153acf5a1e6fec0 [2023-08-26 15:30:12,752 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-26 15:30:12,753 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-26 15:30:12,754 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-26 15:30:12,754 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-26 15:30:12,756 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-26 15:30:12,757 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:30:12" (1/1) ... [2023-08-26 15:30:12,758 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a87ae46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:12, skipping insertion in model container [2023-08-26 15:30:12,758 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:30:12" (1/1) ... [2023-08-26 15:30:12,812 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-26 15:30:13,219 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:30:13,240 INFO L201 MainTranslator]: Completed pre-run [2023-08-26 15:30:13,268 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [249] [2023-08-26 15:30:13,269 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [249] [2023-08-26 15:30:13,275 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: unsigned short [741] [2023-08-26 15:30:13,297 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-26 15:30:13,357 INFO L206 MainTranslator]: Completed translation [2023-08-26 15:30:13,358 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:13 WrapperNode [2023-08-26 15:30:13,358 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-26 15:30:13,359 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-26 15:30:13,359 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-26 15:30:13,359 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-26 15:30:13,365 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:13" (1/1) ... [2023-08-26 15:30:13,394 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:13" (1/1) ... [2023-08-26 15:30:13,416 INFO L138 Inliner]: procedures = 264, calls = 16, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 67 [2023-08-26 15:30:13,417 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-26 15:30:13,417 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-26 15:30:13,417 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-26 15:30:13,417 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-26 15:30:13,425 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:13" (1/1) ... [2023-08-26 15:30:13,425 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:13" (1/1) ... [2023-08-26 15:30:13,437 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:13" (1/1) ... [2023-08-26 15:30:13,437 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:13" (1/1) ... [2023-08-26 15:30:13,447 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:13" (1/1) ... [2023-08-26 15:30:13,449 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:13" (1/1) ... [2023-08-26 15:30:13,450 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:13" (1/1) ... [2023-08-26 15:30:13,451 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:13" (1/1) ... [2023-08-26 15:30:13,459 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-26 15:30:13,460 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-26 15:30:13,460 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-26 15:30:13,460 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-26 15:30:13,460 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:13" (1/1) ... [2023-08-26 15:30:13,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-26 15:30:13,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:30:13,487 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 15:30:13,489 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 15:30:13,518 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-26 15:30:13,519 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-26 15:30:13,519 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-26 15:30:13,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-26 15:30:13,519 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-08-26 15:30:13,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-26 15:30:13,519 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2023-08-26 15:30:13,520 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2023-08-26 15:30:13,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-26 15:30:13,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-26 15:30:13,521 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 15:30:13,635 INFO L236 CfgBuilder]: Building ICFG [2023-08-26 15:30:13,636 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-26 15:30:13,812 INFO L277 CfgBuilder]: Performing block encoding [2023-08-26 15:30:13,818 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-26 15:30:13,819 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-08-26 15:30:13,820 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:30:13 BoogieIcfgContainer [2023-08-26 15:30:13,820 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-26 15:30:13,822 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-26 15:30:13,822 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-26 15:30:13,825 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-26 15:30:13,825 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:30:12" (1/3) ... [2023-08-26 15:30:13,826 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@234e8f0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:30:13, skipping insertion in model container [2023-08-26 15:30:13,826 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:30:13" (2/3) ... [2023-08-26 15:30:13,826 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@234e8f0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:30:13, skipping insertion in model container [2023-08-26 15:30:13,826 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:30:13" (3/3) ... [2023-08-26 15:30:13,827 INFO L112 eAbstractionObserver]: Analyzing ICFG 06-symbeq_06-tricky_address1.i [2023-08-26 15:30:13,843 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-26 15:30:13,843 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-08-26 15:30:13,843 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-26 15:30:13,903 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-26 15:30:13,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 81 transitions, 167 flow [2023-08-26 15:30:13,972 INFO L124 PetriNetUnfolderBase]: 4/80 cut-off events. [2023-08-26 15:30:13,972 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:30:13,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 80 events. 4/80 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 84 event pairs, 0 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2023-08-26 15:30:13,976 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 81 transitions, 167 flow [2023-08-26 15:30:13,980 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 80 transitions, 163 flow [2023-08-26 15:30:13,982 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-26 15:30:13,989 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 80 places, 80 transitions, 163 flow [2023-08-26 15:30:13,991 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 80 places, 80 transitions, 163 flow [2023-08-26 15:30:13,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 80 transitions, 163 flow [2023-08-26 15:30:14,009 INFO L124 PetriNetUnfolderBase]: 4/80 cut-off events. [2023-08-26 15:30:14,009 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:30:14,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84 conditions, 80 events. 4/80 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 85 event pairs, 0 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2023-08-26 15:30:14,011 INFO L119 LiptonReduction]: Number of co-enabled transitions 988 [2023-08-26 15:30:16,048 INFO L134 LiptonReduction]: Checked pairs total: 1784 [2023-08-26 15:30:16,048 INFO L136 LiptonReduction]: Total number of compositions: 82 [2023-08-26 15:30:16,060 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-26 15:30:16,066 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;@5eb59a39, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-26 15:30:16,066 INFO L358 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2023-08-26 15:30:16,067 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-26 15:30:16,067 INFO L124 PetriNetUnfolderBase]: 1/2 cut-off events. [2023-08-26 15:30:16,068 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:30:16,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:16,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1] [2023-08-26 15:30:16,068 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 15:30:16,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:16,073 INFO L85 PathProgramCache]: Analyzing trace with hash 9959, now seen corresponding path program 1 times [2023-08-26 15:30:16,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:16,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718430055] [2023-08-26 15:30:16,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:16,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:16,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:16,183 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 15:30:16,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:16,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718430055] [2023-08-26 15:30:16,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718430055] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:30:16,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:30:16,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-26 15:30:16,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681102160] [2023-08-26 15:30:16,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:30:16,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-08-26 15:30:16,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:16,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-08-26 15:30:16,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-08-26 15:30:16,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 163 [2023-08-26 15:30:16,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 23 transitions, 49 flow. Second operand has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 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 15:30:16,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:16,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 163 [2023-08-26 15:30:16,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:16,271 INFO L124 PetriNetUnfolderBase]: 36/88 cut-off events. [2023-08-26 15:30:16,271 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:30:16,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179 conditions, 88 events. 36/88 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 316 event pairs, 35 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 166. Up to 87 conditions per place. [2023-08-26 15:30:16,273 INFO L140 encePairwiseOnDemand]: 158/163 looper letters, 16 selfloop transitions, 0 changer transitions 0/18 dead transitions. [2023-08-26 15:30:16,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 18 transitions, 71 flow [2023-08-26 15:30:16,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-08-26 15:30:16,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-08-26 15:30:16,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 175 transitions. [2023-08-26 15:30:16,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5368098159509203 [2023-08-26 15:30:16,285 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 175 transitions. [2023-08-26 15:30:16,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 175 transitions. [2023-08-26 15:30:16,286 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:16,288 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 175 transitions. [2023-08-26 15:30:16,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 87.5) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:16,294 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 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 15:30:16,294 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 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 15:30:16,296 INFO L175 Difference]: Start difference. First operand has 26 places, 23 transitions, 49 flow. Second operand 2 states and 175 transitions. [2023-08-26 15:30:16,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 18 transitions, 71 flow [2023-08-26 15:30:16,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 18 transitions, 70 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:30:16,299 INFO L231 Difference]: Finished difference. Result has 21 places, 18 transitions, 38 flow [2023-08-26 15:30:16,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=38, PETRI_PLACES=21, PETRI_TRANSITIONS=18} [2023-08-26 15:30:16,303 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -5 predicate places. [2023-08-26 15:30:16,304 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 18 transitions, 38 flow [2023-08-26 15:30:16,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 78.0) internal successors, (156), 2 states have internal predecessors, (156), 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 15:30:16,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:16,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2023-08-26 15:30:16,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-26 15:30:16,305 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 15:30:16,305 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:16,305 INFO L85 PathProgramCache]: Analyzing trace with hash 9578229, now seen corresponding path program 1 times [2023-08-26 15:30:16,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:16,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912099159] [2023-08-26 15:30:16,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:16,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:16,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:16,443 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 15:30:16,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:16,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912099159] [2023-08-26 15:30:16,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912099159] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:30:16,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:30:16,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:30:16,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321905805] [2023-08-26 15:30:16,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:30:16,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-26 15:30:16,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:16,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-26 15:30:16,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-26 15:30:16,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 163 [2023-08-26 15:30:16,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 18 transitions, 38 flow. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 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 15:30:16,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:16,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 163 [2023-08-26 15:30:16,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:16,508 INFO L124 PetriNetUnfolderBase]: 36/89 cut-off events. [2023-08-26 15:30:16,508 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:30:16,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 89 events. 36/89 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 319 event pairs, 35 based on Foata normal form. 0/56 useless extension candidates. Maximal degree in co-relation 178. Up to 87 conditions per place. [2023-08-26 15:30:16,510 INFO L140 encePairwiseOnDemand]: 160/163 looper letters, 15 selfloop transitions, 2 changer transitions 0/19 dead transitions. [2023-08-26 15:30:16,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 74 flow [2023-08-26 15:30:16,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:30:16,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:30:16,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2023-08-26 15:30:16,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4601226993865031 [2023-08-26 15:30:16,516 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 225 transitions. [2023-08-26 15:30:16,517 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 225 transitions. [2023-08-26 15:30:16,518 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:16,518 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 225 transitions. [2023-08-26 15:30:16,520 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 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 15:30:16,522 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 163.0) internal successors, (652), 4 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:16,522 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 163.0) internal successors, (652), 4 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:16,522 INFO L175 Difference]: Start difference. First operand has 21 places, 18 transitions, 38 flow. Second operand 3 states and 225 transitions. [2023-08-26 15:30:16,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 74 flow [2023-08-26 15:30:16,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 74 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-26 15:30:16,524 INFO L231 Difference]: Finished difference. Result has 24 places, 19 transitions, 50 flow [2023-08-26 15:30:16,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=50, PETRI_PLACES=24, PETRI_TRANSITIONS=19} [2023-08-26 15:30:16,524 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, -2 predicate places. [2023-08-26 15:30:16,525 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 19 transitions, 50 flow [2023-08-26 15:30:16,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 3 states have internal predecessors, (211), 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 15:30:16,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:16,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-26 15:30:16,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-26 15:30:16,528 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 15:30:16,530 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:16,531 INFO L85 PathProgramCache]: Analyzing trace with hash 296346395, now seen corresponding path program 1 times [2023-08-26 15:30:16,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:16,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632993] [2023-08-26 15:30:16,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:16,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:16,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:16,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:30:16,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:16,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632993] [2023-08-26 15:30:16,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632993] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 15:30:16,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348989762] [2023-08-26 15:30:16,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:16,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:30:16,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:30:16,673 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 15:30:16,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-26 15:30:16,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:16,768 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-26 15:30:16,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 15:30:16,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:30:16,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 15:30:16,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:30:16,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348989762] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 15:30:16,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 15:30:16,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-08-26 15:30:16,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286984472] [2023-08-26 15:30:16,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 15:30:16,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 15:30:16,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:16,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 15:30:16,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-08-26 15:30:16,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 163 [2023-08-26 15:30:16,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 24 places, 19 transitions, 50 flow. Second operand has 7 states, 7 states have (on average 70.42857142857143) internal successors, (493), 7 states have internal predecessors, (493), 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 15:30:16,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:16,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 163 [2023-08-26 15:30:16,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:16,883 INFO L124 PetriNetUnfolderBase]: 36/92 cut-off events. [2023-08-26 15:30:16,883 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-26 15:30:16,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 92 events. 36/92 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 317 event pairs, 35 based on Foata normal form. 0/59 useless extension candidates. Maximal degree in co-relation 192. Up to 87 conditions per place. [2023-08-26 15:30:16,886 INFO L140 encePairwiseOnDemand]: 160/163 looper letters, 15 selfloop transitions, 5 changer transitions 0/22 dead transitions. [2023-08-26 15:30:16,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 22 transitions, 102 flow [2023-08-26 15:30:16,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-26 15:30:16,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-26 15:30:16,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 437 transitions. [2023-08-26 15:30:16,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44683026584867075 [2023-08-26 15:30:16,888 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 437 transitions. [2023-08-26 15:30:16,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 437 transitions. [2023-08-26 15:30:16,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:16,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 437 transitions. [2023-08-26 15:30:16,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 72.83333333333333) internal successors, (437), 6 states have internal predecessors, (437), 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 15:30:16,894 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 163.0) internal successors, (1141), 7 states have internal predecessors, (1141), 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 15:30:16,895 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 163.0) internal successors, (1141), 7 states have internal predecessors, (1141), 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 15:30:16,895 INFO L175 Difference]: Start difference. First operand has 24 places, 19 transitions, 50 flow. Second operand 6 states and 437 transitions. [2023-08-26 15:30:16,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 22 transitions, 102 flow [2023-08-26 15:30:16,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 22 transitions, 98 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-26 15:30:16,897 INFO L231 Difference]: Finished difference. Result has 31 places, 22 transitions, 82 flow [2023-08-26 15:30:16,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=82, PETRI_PLACES=31, PETRI_TRANSITIONS=22} [2023-08-26 15:30:16,898 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 5 predicate places. [2023-08-26 15:30:16,899 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 22 transitions, 82 flow [2023-08-26 15:30:16,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 70.42857142857143) internal successors, (493), 7 states have internal predecessors, (493), 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 15:30:16,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:16,899 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-08-26 15:30:16,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-26 15:30:17,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:30:17,105 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 15:30:17,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:17,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1723007093, now seen corresponding path program 2 times [2023-08-26 15:30:17,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:17,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912353004] [2023-08-26 15:30:17,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:17,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:17,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:17,222 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:30:17,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:17,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912353004] [2023-08-26 15:30:17,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912353004] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 15:30:17,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605358915] [2023-08-26 15:30:17,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-26 15:30:17,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:30:17,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:30:17,224 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 15:30:17,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-26 15:30:17,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-08-26 15:30:17,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-26 15:30:17,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-26 15:30:17,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 15:30:17,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-26 15:30:17,382 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2023-08-26 15:30:17,406 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-08-26 15:30:17,406 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-26 15:30:17,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605358915] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:30:17,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-26 15:30:17,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2023-08-26 15:30:17,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399496090] [2023-08-26 15:30:17,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:30:17,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 15:30:17,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:17,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 15:30:17,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-08-26 15:30:17,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 163 [2023-08-26 15:30:17,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 22 transitions, 82 flow. Second operand has 4 states, 4 states have (on average 57.25) internal successors, (229), 4 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:17,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:17,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 163 [2023-08-26 15:30:17,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:17,450 INFO L124 PetriNetUnfolderBase]: 36/91 cut-off events. [2023-08-26 15:30:17,451 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-26 15:30:17,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 91 events. 36/91 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 256 event pairs, 35 based on Foata normal form. 0/71 useless extension candidates. Maximal degree in co-relation 201. Up to 90 conditions per place. [2023-08-26 15:30:17,453 INFO L140 encePairwiseOnDemand]: 161/163 looper letters, 19 selfloop transitions, 1 changer transitions 0/21 dead transitions. [2023-08-26 15:30:17,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 21 transitions, 120 flow [2023-08-26 15:30:17,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:30:17,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:30:17,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 185 transitions. [2023-08-26 15:30:17,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3783231083844581 [2023-08-26 15:30:17,454 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 185 transitions. [2023-08-26 15:30:17,454 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 185 transitions. [2023-08-26 15:30:17,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:17,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 185 transitions. [2023-08-26 15:30:17,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.666666666666664) internal successors, (185), 3 states have internal predecessors, (185), 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 15:30:17,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 163.0) internal successors, (652), 4 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:17,457 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 163.0) internal successors, (652), 4 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:17,457 INFO L175 Difference]: Start difference. First operand has 31 places, 22 transitions, 82 flow. Second operand 3 states and 185 transitions. [2023-08-26 15:30:17,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 21 transitions, 120 flow [2023-08-26 15:30:17,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 21 transitions, 106 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-08-26 15:30:17,462 INFO L231 Difference]: Finished difference. Result has 31 places, 21 transitions, 68 flow [2023-08-26 15:30:17,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=68, PETRI_PLACES=31, PETRI_TRANSITIONS=21} [2023-08-26 15:30:17,464 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 5 predicate places. [2023-08-26 15:30:17,464 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 21 transitions, 68 flow [2023-08-26 15:30:17,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.25) internal successors, (229), 4 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:17,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:17,464 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1] [2023-08-26 15:30:17,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-26 15:30:17,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-26 15:30:17,670 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 15:30:17,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:17,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1723007079, now seen corresponding path program 1 times [2023-08-26 15:30:17,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:17,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125160918] [2023-08-26 15:30:17,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:17,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:17,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:17,767 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:30:17,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:17,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125160918] [2023-08-26 15:30:17,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125160918] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-26 15:30:17,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119619729] [2023-08-26 15:30:17,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:17,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:30:17,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-26 15:30:17,773 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-26 15:30:17,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-26 15:30:17,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:17,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-26 15:30:17,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-26 15:30:17,871 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:30:17,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-26 15:30:17,935 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-26 15:30:17,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119619729] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-26 15:30:17,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-26 15:30:17,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-26 15:30:17,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492871072] [2023-08-26 15:30:17,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-26 15:30:17,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-26 15:30:17,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:17,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-26 15:30:17,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-08-26 15:30:17,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 163 [2023-08-26 15:30:17,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 21 transitions, 68 flow. Second operand has 13 states, 13 states have (on average 70.23076923076923) internal successors, (913), 13 states have internal predecessors, (913), 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 15:30:17,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:17,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 163 [2023-08-26 15:30:17,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:18,004 INFO L124 PetriNetUnfolderBase]: 29/83 cut-off events. [2023-08-26 15:30:18,004 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-08-26 15:30:18,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 83 events. 29/83 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 248 event pairs, 28 based on Foata normal form. 6/67 useless extension candidates. Maximal degree in co-relation 190. Up to 72 conditions per place. [2023-08-26 15:30:18,005 INFO L140 encePairwiseOnDemand]: 160/163 looper letters, 14 selfloop transitions, 11 changer transitions 0/27 dead transitions. [2023-08-26 15:30:18,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 27 transitions, 154 flow [2023-08-26 15:30:18,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-26 15:30:18,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-26 15:30:18,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 859 transitions. [2023-08-26 15:30:18,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.439161554192229 [2023-08-26 15:30:18,008 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 859 transitions. [2023-08-26 15:30:18,008 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 859 transitions. [2023-08-26 15:30:18,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:18,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 859 transitions. [2023-08-26 15:30:18,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 71.58333333333333) internal successors, (859), 12 states have internal predecessors, (859), 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 15:30:18,014 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 163.0) internal successors, (2119), 13 states have internal predecessors, (2119), 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 15:30:18,015 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 163.0) internal successors, (2119), 13 states have internal predecessors, (2119), 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 15:30:18,015 INFO L175 Difference]: Start difference. First operand has 31 places, 21 transitions, 68 flow. Second operand 12 states and 859 transitions. [2023-08-26 15:30:18,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 27 transitions, 154 flow [2023-08-26 15:30:18,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 27 transitions, 153 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-26 15:30:18,017 INFO L231 Difference]: Finished difference. Result has 47 places, 27 transitions, 151 flow [2023-08-26 15:30:18,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=151, PETRI_PLACES=47, PETRI_TRANSITIONS=27} [2023-08-26 15:30:18,019 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 21 predicate places. [2023-08-26 15:30:18,019 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 27 transitions, 151 flow [2023-08-26 15:30:18,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 70.23076923076923) internal successors, (913), 13 states have internal predecessors, (913), 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 15:30:18,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:18,020 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-08-26 15:30:18,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-26 15:30:18,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-26 15:30:18,226 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 15:30:18,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:18,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1850859175, now seen corresponding path program 2 times [2023-08-26 15:30:18,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:18,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184073991] [2023-08-26 15:30:18,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:18,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:18,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:18,474 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 15:30:18,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:18,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184073991] [2023-08-26 15:30:18,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184073991] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:30:18,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:30:18,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:30:18,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584737389] [2023-08-26 15:30:18,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:30:18,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 15:30:18,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:18,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 15:30:18,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-26 15:30:18,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 163 [2023-08-26 15:30:18,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 27 transitions, 151 flow. Second operand has 4 states, 4 states have (on average 54.25) internal successors, (217), 4 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 15:30:18,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:18,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 163 [2023-08-26 15:30:18,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:18,526 INFO L124 PetriNetUnfolderBase]: 31/86 cut-off events. [2023-08-26 15:30:18,526 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-08-26 15:30:18,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236 conditions, 86 events. 31/86 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 195 event pairs, 30 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 221. Up to 73 conditions per place. [2023-08-26 15:30:18,527 INFO L140 encePairwiseOnDemand]: 160/163 looper letters, 23 selfloop transitions, 2 changer transitions 0/26 dead transitions. [2023-08-26 15:30:18,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 26 transitions, 199 flow [2023-08-26 15:30:18,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-26 15:30:18,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-26 15:30:18,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 228 transitions. [2023-08-26 15:30:18,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3496932515337423 [2023-08-26 15:30:18,528 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 228 transitions. [2023-08-26 15:30:18,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 228 transitions. [2023-08-26 15:30:18,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:18,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 228 transitions. [2023-08-26 15:30:18,529 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 57.0) internal successors, (228), 4 states have internal predecessors, (228), 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 15:30:18,530 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 163.0) internal successors, (815), 5 states have internal predecessors, (815), 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 15:30:18,531 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 163.0) internal successors, (815), 5 states have internal predecessors, (815), 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 15:30:18,531 INFO L175 Difference]: Start difference. First operand has 47 places, 27 transitions, 151 flow. Second operand 4 states and 228 transitions. [2023-08-26 15:30:18,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 26 transitions, 199 flow [2023-08-26 15:30:18,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 26 transitions, 151 flow, removed 19 selfloop flow, removed 5 redundant places. [2023-08-26 15:30:18,534 INFO L231 Difference]: Finished difference. Result has 44 places, 26 transitions, 105 flow [2023-08-26 15:30:18,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=105, PETRI_PLACES=44, PETRI_TRANSITIONS=26} [2023-08-26 15:30:18,534 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 18 predicate places. [2023-08-26 15:30:18,535 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 26 transitions, 105 flow [2023-08-26 15:30:18,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.25) internal successors, (217), 4 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 15:30:18,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:18,535 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1] [2023-08-26 15:30:18,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-26 15:30:18,535 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 15:30:18,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:18,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1850859174, now seen corresponding path program 1 times [2023-08-26 15:30:18,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:18,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741485471] [2023-08-26 15:30:18,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:18,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:18,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:18,620 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 15:30:18,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:18,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741485471] [2023-08-26 15:30:18,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741485471] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:30:18,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:30:18,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-26 15:30:18,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633662363] [2023-08-26 15:30:18,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:30:18,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-26 15:30:18,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:18,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-26 15:30:18,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-26 15:30:18,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 163 [2023-08-26 15:30:18,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 26 transitions, 105 flow. Second operand has 4 states, 4 states have (on average 55.25) internal successors, (221), 4 states have internal predecessors, (221), 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 15:30:18,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:18,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 163 [2023-08-26 15:30:18,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:18,660 INFO L124 PetriNetUnfolderBase]: 31/85 cut-off events. [2023-08-26 15:30:18,660 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2023-08-26 15:30:18,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 213 conditions, 85 events. 31/85 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 189 event pairs, 24 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 198. Up to 72 conditions per place. [2023-08-26 15:30:18,661 INFO L140 encePairwiseOnDemand]: 160/163 looper letters, 25 selfloop transitions, 2 changer transitions 4/31 dead transitions. [2023-08-26 15:30:18,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 31 transitions, 177 flow [2023-08-26 15:30:18,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-26 15:30:18,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-26 15:30:18,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 184 transitions. [2023-08-26 15:30:18,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37627811860940696 [2023-08-26 15:30:18,662 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 184 transitions. [2023-08-26 15:30:18,662 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 184 transitions. [2023-08-26 15:30:18,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:18,663 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 184 transitions. [2023-08-26 15:30:18,663 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 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 15:30:18,664 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 163.0) internal successors, (652), 4 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:18,664 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 163.0) internal successors, (652), 4 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:18,664 INFO L175 Difference]: Start difference. First operand has 44 places, 26 transitions, 105 flow. Second operand 3 states and 184 transitions. [2023-08-26 15:30:18,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 31 transitions, 177 flow [2023-08-26 15:30:18,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 31 transitions, 174 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:30:18,666 INFO L231 Difference]: Finished difference. Result has 43 places, 23 transitions, 100 flow [2023-08-26 15:30:18,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=43, PETRI_TRANSITIONS=23} [2023-08-26 15:30:18,667 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 17 predicate places. [2023-08-26 15:30:18,667 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 23 transitions, 100 flow [2023-08-26 15:30:18,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 55.25) internal successors, (221), 4 states have internal predecessors, (221), 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 15:30:18,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:18,667 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1] [2023-08-26 15:30:18,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-26 15:30:18,667 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 15:30:18,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:18,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1542060112, now seen corresponding path program 1 times [2023-08-26 15:30:18,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:18,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275970623] [2023-08-26 15:30:18,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:18,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:18,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:18,791 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 15:30:18,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:18,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275970623] [2023-08-26 15:30:18,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275970623] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:30:18,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:30:18,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-26 15:30:18,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371454754] [2023-08-26 15:30:18,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:30:18,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-26 15:30:18,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:18,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-26 15:30:18,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-26 15:30:18,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 163 [2023-08-26 15:30:18,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 23 transitions, 100 flow. Second operand has 5 states, 5 states have (on average 51.2) internal successors, (256), 5 states have internal predecessors, (256), 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 15:30:18,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:18,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 163 [2023-08-26 15:30:18,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:18,834 INFO L124 PetriNetUnfolderBase]: 10/43 cut-off events. [2023-08-26 15:30:18,834 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2023-08-26 15:30:18,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 43 events. 10/43 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 57 event pairs, 0 based on Foata normal form. 6/48 useless extension candidates. Maximal degree in co-relation 117. Up to 18 conditions per place. [2023-08-26 15:30:18,835 INFO L140 encePairwiseOnDemand]: 157/163 looper letters, 25 selfloop transitions, 4 changer transitions 1/30 dead transitions. [2023-08-26 15:30:18,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 30 transitions, 176 flow [2023-08-26 15:30:18,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 15:30:18,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 15:30:18,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 273 transitions. [2023-08-26 15:30:18,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33496932515337424 [2023-08-26 15:30:18,837 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 273 transitions. [2023-08-26 15:30:18,837 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 273 transitions. [2023-08-26 15:30:18,837 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:18,837 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 273 transitions. [2023-08-26 15:30:18,838 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 54.6) internal successors, (273), 5 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:18,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 163.0) internal successors, (978), 6 states have internal predecessors, (978), 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 15:30:18,839 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 163.0) internal successors, (978), 6 states have internal predecessors, (978), 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 15:30:18,839 INFO L175 Difference]: Start difference. First operand has 43 places, 23 transitions, 100 flow. Second operand 5 states and 273 transitions. [2023-08-26 15:30:18,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 30 transitions, 176 flow [2023-08-26 15:30:18,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 30 transitions, 170 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-26 15:30:18,841 INFO L231 Difference]: Finished difference. Result has 47 places, 25 transitions, 126 flow [2023-08-26 15:30:18,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=126, PETRI_PLACES=47, PETRI_TRANSITIONS=25} [2023-08-26 15:30:18,841 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 21 predicate places. [2023-08-26 15:30:18,841 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 25 transitions, 126 flow [2023-08-26 15:30:18,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 51.2) internal successors, (256), 5 states have internal predecessors, (256), 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 15:30:18,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:18,842 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:30:18,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-26 15:30:18,842 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 15:30:18,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:18,843 INFO L85 PathProgramCache]: Analyzing trace with hash 964087520, now seen corresponding path program 1 times [2023-08-26 15:30:18,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:18,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845126569] [2023-08-26 15:30:18,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:18,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:18,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:18,951 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 15:30:18,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:18,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845126569] [2023-08-26 15:30:18,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845126569] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:30:18,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:30:18,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 15:30:18,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89359007] [2023-08-26 15:30:18,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:30:18,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 15:30:18,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:18,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 15:30:18,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-26 15:30:18,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 163 [2023-08-26 15:30:18,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 25 transitions, 126 flow. Second operand has 7 states, 7 states have (on average 48.57142857142857) internal successors, (340), 7 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:18,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:18,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 163 [2023-08-26 15:30:18,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:19,049 INFO L124 PetriNetUnfolderBase]: 11/51 cut-off events. [2023-08-26 15:30:19,050 INFO L125 PetriNetUnfolderBase]: For 69/69 co-relation queries the response was YES. [2023-08-26 15:30:19,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 51 events. 11/51 cut-off events. For 69/69 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 99 event pairs, 1 based on Foata normal form. 2/53 useless extension candidates. Maximal degree in co-relation 163. Up to 18 conditions per place. [2023-08-26 15:30:19,050 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 22 selfloop transitions, 9 changer transitions 5/36 dead transitions. [2023-08-26 15:30:19,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 36 transitions, 236 flow [2023-08-26 15:30:19,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-26 15:30:19,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-26 15:30:19,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 450 transitions. [2023-08-26 15:30:19,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3067484662576687 [2023-08-26 15:30:19,052 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 450 transitions. [2023-08-26 15:30:19,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 450 transitions. [2023-08-26 15:30:19,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:19,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 450 transitions. [2023-08-26 15:30:19,054 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 50.0) internal successors, (450), 9 states have internal predecessors, (450), 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 15:30:19,056 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 163.0) internal successors, (1630), 10 states have internal predecessors, (1630), 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 15:30:19,056 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 163.0) internal successors, (1630), 10 states have internal predecessors, (1630), 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 15:30:19,056 INFO L175 Difference]: Start difference. First operand has 47 places, 25 transitions, 126 flow. Second operand 9 states and 450 transitions. [2023-08-26 15:30:19,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 36 transitions, 236 flow [2023-08-26 15:30:19,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 36 transitions, 229 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-26 15:30:19,058 INFO L231 Difference]: Finished difference. Result has 54 places, 28 transitions, 160 flow [2023-08-26 15:30:19,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=44, 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=9, PETRI_FLOW=160, PETRI_PLACES=54, PETRI_TRANSITIONS=28} [2023-08-26 15:30:19,059 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 28 predicate places. [2023-08-26 15:30:19,059 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 28 transitions, 160 flow [2023-08-26 15:30:19,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 48.57142857142857) internal successors, (340), 7 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:19,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:19,059 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:30:19,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-26 15:30:19,060 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 15:30:19,060 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:19,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1816763600, now seen corresponding path program 2 times [2023-08-26 15:30:19,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:19,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260274315] [2023-08-26 15:30:19,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:19,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:19,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:19,214 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 15:30:19,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:19,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260274315] [2023-08-26 15:30:19,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260274315] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:30:19,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:30:19,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-08-26 15:30:19,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636133807] [2023-08-26 15:30:19,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:30:19,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-26 15:30:19,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:19,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-26 15:30:19,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-08-26 15:30:19,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 163 [2023-08-26 15:30:19,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 28 transitions, 160 flow. Second operand has 8 states, 8 states have (on average 48.375) internal successors, (387), 8 states have internal predecessors, (387), 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 15:30:19,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:19,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 163 [2023-08-26 15:30:19,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:19,297 INFO L124 PetriNetUnfolderBase]: 6/38 cut-off events. [2023-08-26 15:30:19,297 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2023-08-26 15:30:19,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 38 events. 6/38 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 41 event pairs, 0 based on Foata normal form. 2/40 useless extension candidates. Maximal degree in co-relation 140. Up to 15 conditions per place. [2023-08-26 15:30:19,299 INFO L140 encePairwiseOnDemand]: 155/163 looper letters, 18 selfloop transitions, 3 changer transitions 11/32 dead transitions. [2023-08-26 15:30:19,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 32 transitions, 231 flow [2023-08-26 15:30:19,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-26 15:30:19,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-26 15:30:19,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 352 transitions. [2023-08-26 15:30:19,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30850131463628394 [2023-08-26 15:30:19,301 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 352 transitions. [2023-08-26 15:30:19,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 352 transitions. [2023-08-26 15:30:19,301 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:19,301 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 352 transitions. [2023-08-26 15:30:19,302 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 50.285714285714285) internal successors, (352), 7 states have internal predecessors, (352), 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 15:30:19,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 163.0) internal successors, (1304), 8 states have internal predecessors, (1304), 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 15:30:19,304 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 163.0) internal successors, (1304), 8 states have internal predecessors, (1304), 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 15:30:19,304 INFO L175 Difference]: Start difference. First operand has 54 places, 28 transitions, 160 flow. Second operand 7 states and 352 transitions. [2023-08-26 15:30:19,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 32 transitions, 231 flow [2023-08-26 15:30:19,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 32 transitions, 215 flow, removed 3 selfloop flow, removed 4 redundant places. [2023-08-26 15:30:19,307 INFO L231 Difference]: Finished difference. Result has 55 places, 21 transitions, 116 flow [2023-08-26 15:30:19,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=116, PETRI_PLACES=55, PETRI_TRANSITIONS=21} [2023-08-26 15:30:19,308 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 29 predicate places. [2023-08-26 15:30:19,308 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 21 transitions, 116 flow [2023-08-26 15:30:19,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 48.375) internal successors, (387), 8 states have internal predecessors, (387), 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 15:30:19,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-26 15:30:19,308 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-26 15:30:19,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-26 15:30:19,309 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 12 more)] === [2023-08-26 15:30:19,309 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-26 15:30:19,309 INFO L85 PathProgramCache]: Analyzing trace with hash 964061480, now seen corresponding path program 3 times [2023-08-26 15:30:19,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-26 15:30:19,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968833138] [2023-08-26 15:30:19,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-26 15:30:19,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-26 15:30:19,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-26 15:30:19,471 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-08-26 15:30:19,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-26 15:30:19,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968833138] [2023-08-26 15:30:19,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968833138] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-26 15:30:19,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-26 15:30:19,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-26 15:30:19,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268954780] [2023-08-26 15:30:19,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-26 15:30:19,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-26 15:30:19,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-26 15:30:19,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-26 15:30:19,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-08-26 15:30:19,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 163 [2023-08-26 15:30:19,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 21 transitions, 116 flow. Second operand has 7 states, 7 states have (on average 48.57142857142857) internal successors, (340), 7 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:19,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-26 15:30:19,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 163 [2023-08-26 15:30:19,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-26 15:30:19,511 INFO L124 PetriNetUnfolderBase]: 1/20 cut-off events. [2023-08-26 15:30:19,511 INFO L125 PetriNetUnfolderBase]: For 63/63 co-relation queries the response was YES. [2023-08-26 15:30:19,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97 conditions, 20 events. 1/20 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 1. Compared 1 event pairs, 0 based on Foata normal form. 1/21 useless extension candidates. Maximal degree in co-relation 77. Up to 13 conditions per place. [2023-08-26 15:30:19,511 INFO L140 encePairwiseOnDemand]: 158/163 looper letters, 0 selfloop transitions, 0 changer transitions 20/20 dead transitions. [2023-08-26 15:30:19,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 20 transitions, 150 flow [2023-08-26 15:30:19,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-26 15:30:19,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-26 15:30:19,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 246 transitions. [2023-08-26 15:30:19,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.301840490797546 [2023-08-26 15:30:19,512 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 246 transitions. [2023-08-26 15:30:19,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 246 transitions. [2023-08-26 15:30:19,513 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-26 15:30:19,513 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 246 transitions. [2023-08-26 15:30:19,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 49.2) internal successors, (246), 5 states have internal predecessors, (246), 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 15:30:19,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 163.0) internal successors, (978), 6 states have internal predecessors, (978), 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 15:30:19,515 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 163.0) internal successors, (978), 6 states have internal predecessors, (978), 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 15:30:19,515 INFO L175 Difference]: Start difference. First operand has 55 places, 21 transitions, 116 flow. Second operand 5 states and 246 transitions. [2023-08-26 15:30:19,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 20 transitions, 150 flow [2023-08-26 15:30:19,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 20 transitions, 134 flow, removed 1 selfloop flow, removed 8 redundant places. [2023-08-26 15:30:19,516 INFO L231 Difference]: Finished difference. Result has 43 places, 0 transitions, 0 flow [2023-08-26 15:30:19,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=163, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=0, PETRI_PLACES=43, PETRI_TRANSITIONS=0} [2023-08-26 15:30:19,517 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 17 predicate places. [2023-08-26 15:30:19,517 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 0 transitions, 0 flow [2023-08-26 15:30:19,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 48.57142857142857) internal successors, (340), 7 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-26 15:30:19,519 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 15 remaining) [2023-08-26 15:30:19,519 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 15 remaining) [2023-08-26 15:30:19,519 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 15 remaining) [2023-08-26 15:30:19,519 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 15 remaining) [2023-08-26 15:30:19,519 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 15 remaining) [2023-08-26 15:30:19,519 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 15 remaining) [2023-08-26 15:30:19,519 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 15 remaining) [2023-08-26 15:30:19,519 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 15 remaining) [2023-08-26 15:30:19,520 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 15 remaining) [2023-08-26 15:30:19,520 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 15 remaining) [2023-08-26 15:30:19,520 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 15 remaining) [2023-08-26 15:30:19,520 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 15 remaining) [2023-08-26 15:30:19,520 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 15 remaining) [2023-08-26 15:30:19,520 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 15 remaining) [2023-08-26 15:30:19,520 INFO L805 garLoopResultBuilder]: Registering result SAFE for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 15 remaining) [2023-08-26 15:30:19,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-26 15:30:19,521 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 2, 1, 1, 1, 1] [2023-08-26 15:30:19,524 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-26 15:30:19,524 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-26 15:30:19,526 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 03:30:19 BasicIcfg [2023-08-26 15:30:19,526 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-26 15:30:19,527 INFO L158 Benchmark]: Toolchain (without parser) took 6774.14ms. Allocated memory was 335.5MB in the beginning and 402.7MB in the end (delta: 67.1MB). Free memory was 310.2MB in the beginning and 347.9MB in the end (delta: -37.6MB). Peak memory consumption was 30.5MB. Max. memory is 16.0GB. [2023-08-26 15:30:19,527 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 335.5MB. Free memory is still 312.0MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 15:30:19,527 INFO L158 Benchmark]: CACSL2BoogieTranslator took 604.46ms. Allocated memory is still 335.5MB. Free memory was 310.2MB in the beginning and 282.5MB in the end (delta: 27.8MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. [2023-08-26 15:30:19,527 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.67ms. Allocated memory is still 335.5MB. Free memory was 282.5MB in the beginning and 280.0MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 15:30:19,528 INFO L158 Benchmark]: Boogie Preprocessor took 41.67ms. Allocated memory is still 335.5MB. Free memory was 280.0MB in the beginning and 278.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-26 15:30:19,528 INFO L158 Benchmark]: RCFGBuilder took 361.02ms. Allocated memory is still 335.5MB. Free memory was 278.4MB in the beginning and 263.7MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-26 15:30:19,528 INFO L158 Benchmark]: TraceAbstraction took 5704.12ms. Allocated memory was 335.5MB in the beginning and 402.7MB in the end (delta: 67.1MB). Free memory was 263.2MB in the beginning and 347.9MB in the end (delta: -84.6MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-26 15:30:19,529 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 335.5MB. Free memory is still 312.0MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 604.46ms. Allocated memory is still 335.5MB. Free memory was 310.2MB in the beginning and 282.5MB in the end (delta: 27.8MB). Peak memory consumption was 27.3MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 57.67ms. Allocated memory is still 335.5MB. Free memory was 282.5MB in the beginning and 280.0MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 41.67ms. Allocated memory is still 335.5MB. Free memory was 280.0MB in the beginning and 278.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 361.02ms. Allocated memory is still 335.5MB. Free memory was 278.4MB in the beginning and 263.7MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 5704.12ms. Allocated memory was 335.5MB in the beginning and 402.7MB in the end (delta: 67.1MB). Free memory was 263.2MB in the beginning and 347.9MB in the end (delta: -84.6MB). There was no memory consumed. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 249]: Unsoundness Warning unspecified type, defaulting to int C: short [249] - GenericResultAtLocation [Line: 249]: Unsoundness Warning unspecified type, defaulting to int C: short [249] - GenericResultAtLocation [Line: 741]: Unsoundness Warning unspecified type, defaulting to int C: unsigned short [741] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.1s, 80 PlacesBefore, 26 PlacesAfterwards, 80 TransitionsBefore, 23 TransitionsAfterwards, 988 CoEnabledTransitionPairs, 6 FixpointIterations, 31 TrivialSequentialCompositions, 40 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 3 ConcurrentYvCompositions, 3 ChoiceCompositions, 82 TotalNumberOfCompositions, 1784 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1166, independent: 1064, independent conditional: 0, independent unconditional: 1064, dependent: 102, dependent conditional: 0, dependent unconditional: 102, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 574, independent: 554, independent conditional: 0, independent unconditional: 554, dependent: 20, dependent conditional: 0, dependent unconditional: 20, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1166, independent: 510, independent conditional: 0, independent unconditional: 510, dependent: 82, dependent conditional: 0, dependent unconditional: 82, unknown: 574, unknown conditional: 0, unknown unconditional: 574] , Statistics on independence cache: Total cache size (in pairs): 45, Positive cache size: 35, Positive conditional cache size: 0, Positive unconditional cache size: 35, Negative cache size: 10, Negative conditional cache size: 0, Negative unconditional cache size: 10, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -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: -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 - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 105 locations, 15 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: 11, TraceHistogramMax: 10, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 119 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 119 mSDsluCounter, 6 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2 mSDsCounter, 15 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 424 IncrementalHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 15 mSolverCounterUnsat, 4 mSDtfsCounter, 424 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 85 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=160occurred in iteration=9, InterpolantAutomatonStates: 59, 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, 0.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 151 NumberOfCodeBlocks, 147 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 148 ConstructedInterpolants, 0 QuantifiedInterpolants, 966 SizeOfPredicates, 2 NumberOfNonLiveVariables, 247 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 16 InterpolantComputations, 9 PerfectInterpolantSequences, 340/383 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 15:30:19,546 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...