/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/list-properties/list_search-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-19 16:35:58,654 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-19 16:35:58,701 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-19 16:35:58,704 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-19 16:35:58,704 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-19 16:35:58,730 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-19 16:35:58,731 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-19 16:35:58,731 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-19 16:35:58,732 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-19 16:35:58,733 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-19 16:35:58,733 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-19 16:35:58,733 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-19 16:35:58,733 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-19 16:35:58,734 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-19 16:35:58,734 INFO L153 SettingsManager]: * Use SBE=true [2023-12-19 16:35:58,734 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-19 16:35:58,734 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-19 16:35:58,734 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-19 16:35:58,735 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-19 16:35:58,735 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-19 16:35:58,735 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-19 16:35:58,737 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-19 16:35:58,738 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-19 16:35:58,738 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-19 16:35:58,738 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-19 16:35:58,738 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-19 16:35:58,738 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-19 16:35:58,738 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-19 16:35:58,739 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-19 16:35:58,739 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-19 16:35:58,739 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-19 16:35:58,740 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-19 16:35:58,740 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 16:35:58,740 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-19 16:35:58,740 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-19 16:35:58,740 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-19 16:35:58,740 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-19 16:35:58,740 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-19 16:35:58,740 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-19 16:35:58,740 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-19 16:35:58,740 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-19 16:35:58,741 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-19 16:35:58,741 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-19 16:35:58,741 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-19 16:35:58,927 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-19 16:35:58,948 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-19 16:35:58,949 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-19 16:35:58,950 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-19 16:35:58,950 INFO L274 PluginConnector]: CDTParser initialized [2023-12-19 16:35:58,951 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-properties/list_search-1.i [2023-12-19 16:35:59,885 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-19 16:36:00,035 INFO L384 CDTParser]: Found 1 translation units. [2023-12-19 16:36:00,035 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list_search-1.i [2023-12-19 16:36:00,047 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2ebb94bf/101f0e2ce8d248769a7896c6d1a87d61/FLAGf3eb02328 [2023-12-19 16:36:00,059 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2ebb94bf/101f0e2ce8d248769a7896c6d1a87d61 [2023-12-19 16:36:00,062 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-19 16:36:00,064 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-19 16:36:00,065 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-19 16:36:00,065 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-19 16:36:00,069 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-19 16:36:00,069 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 04:36:00" (1/1) ... [2023-12-19 16:36:00,070 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32cec6ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 04:36:00, skipping insertion in model container [2023-12-19 16:36:00,070 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 04:36:00" (1/1) ... [2023-12-19 16:36:00,105 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-19 16:36:00,244 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list_search-1.i[813,826] [2023-12-19 16:36:00,356 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 16:36:00,363 INFO L202 MainTranslator]: Completed pre-run [2023-12-19 16:36:00,374 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-properties/list_search-1.i[813,826] [2023-12-19 16:36:00,401 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 16:36:00,418 INFO L206 MainTranslator]: Completed translation [2023-12-19 16:36:00,419 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 04:36:00 WrapperNode [2023-12-19 16:36:00,419 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-19 16:36:00,420 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-19 16:36:00,420 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-19 16:36:00,420 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-19 16:36:00,424 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 04:36:00" (1/1) ... [2023-12-19 16:36:00,432 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 04:36:00" (1/1) ... [2023-12-19 16:36:00,445 INFO L138 Inliner]: procedures = 125, calls = 22, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 66 [2023-12-19 16:36:00,445 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-19 16:36:00,446 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-19 16:36:00,446 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-19 16:36:00,446 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-19 16:36:00,453 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 04:36:00" (1/1) ... [2023-12-19 16:36:00,453 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 04:36:00" (1/1) ... [2023-12-19 16:36:00,457 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 04:36:00" (1/1) ... [2023-12-19 16:36:00,480 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 4 writes are split as follows [0, 4]. [2023-12-19 16:36:00,481 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 04:36:00" (1/1) ... [2023-12-19 16:36:00,481 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 04:36:00" (1/1) ... [2023-12-19 16:36:00,485 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 04:36:00" (1/1) ... [2023-12-19 16:36:00,487 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 04:36:00" (1/1) ... [2023-12-19 16:36:00,489 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 04:36:00" (1/1) ... [2023-12-19 16:36:00,489 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 04:36:00" (1/1) ... [2023-12-19 16:36:00,491 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-19 16:36:00,492 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-19 16:36:00,492 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-19 16:36:00,492 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-19 16:36:00,493 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 04:36:00" (1/1) ... [2023-12-19 16:36:00,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 16:36:00,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 16:36:00,523 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-19 16:36:00,531 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-19 16:36:00,545 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-19 16:36:00,545 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-19 16:36:00,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-19 16:36:00,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-19 16:36:00,545 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-19 16:36:00,545 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-19 16:36:00,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2023-12-19 16:36:00,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2023-12-19 16:36:00,546 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2023-12-19 16:36:00,546 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2023-12-19 16:36:00,546 INFO L130 BoogieDeclarations]: Found specification of procedure insert_list [2023-12-19 16:36:00,546 INFO L138 BoogieDeclarations]: Found implementation of procedure insert_list [2023-12-19 16:36:00,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-19 16:36:00,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-19 16:36:00,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-19 16:36:00,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-19 16:36:00,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-19 16:36:00,629 INFO L241 CfgBuilder]: Building ICFG [2023-12-19 16:36:00,630 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-19 16:36:00,747 INFO L282 CfgBuilder]: Performing block encoding [2023-12-19 16:36:00,765 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-19 16:36:00,765 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-19 16:36:00,765 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 04:36:00 BoogieIcfgContainer [2023-12-19 16:36:00,765 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-19 16:36:00,767 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-19 16:36:00,767 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-19 16:36:00,769 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-19 16:36:00,769 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.12 04:36:00" (1/3) ... [2023-12-19 16:36:00,769 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@580195d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 04:36:00, skipping insertion in model container [2023-12-19 16:36:00,769 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 04:36:00" (2/3) ... [2023-12-19 16:36:00,770 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@580195d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 04:36:00, skipping insertion in model container [2023-12-19 16:36:00,770 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 04:36:00" (3/3) ... [2023-12-19 16:36:00,770 INFO L112 eAbstractionObserver]: Analyzing ICFG list_search-1.i [2023-12-19 16:36:00,781 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-19 16:36:00,781 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-19 16:36:00,811 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-19 16:36:00,815 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@5f6aa1f8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-19 16:36:00,815 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-19 16:36:00,817 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-19 16:36:00,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-19 16:36:00,822 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 16:36:00,822 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 16:36:00,822 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 16:36:00,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 16:36:00,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1970383394, now seen corresponding path program 1 times [2023-12-19 16:36:00,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 16:36:00,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618509166] [2023-12-19 16:36:00,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:36:00,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 16:36:00,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:36:01,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 16:36:01,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:36:01,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-19 16:36:01,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:36:01,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-19 16:36:01,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:36:01,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-19 16:36:01,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:36:01,348 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-19 16:36:01,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 16:36:01,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618509166] [2023-12-19 16:36:01,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618509166] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 16:36:01,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377427065] [2023-12-19 16:36:01,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:36:01,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 16:36:01,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 16:36:01,359 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) [2023-12-19 16:36:01,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-19 16:36:01,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:36:01,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-19 16:36:01,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 16:36:01,516 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-19 16:36:01,516 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 16:36:01,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377427065] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 16:36:01,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-19 16:36:01,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 7 [2023-12-19 16:36:01,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706330868] [2023-12-19 16:36:01,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 16:36:01,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-19 16:36:01,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 16:36:01,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-19 16:36:01,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-19 16:36:01,542 INFO L87 Difference]: Start difference. First operand has 24 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-19 16:36:01,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 16:36:01,558 INFO L93 Difference]: Finished difference Result 32 states and 43 transitions. [2023-12-19 16:36:01,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-19 16:36:01,560 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2023-12-19 16:36:01,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 16:36:01,564 INFO L225 Difference]: With dead ends: 32 [2023-12-19 16:36:01,564 INFO L226 Difference]: Without dead ends: 20 [2023-12-19 16:36:01,566 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-12-19 16:36:01,571 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 16:36:01,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 16:36:01,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-12-19 16:36:01,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-12-19 16:36:01,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-19 16:36:01,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2023-12-19 16:36:01,594 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 29 [2023-12-19 16:36:01,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 16:36:01,595 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2023-12-19 16:36:01,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-19 16:36:01,595 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2023-12-19 16:36:01,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-19 16:36:01,596 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 16:36:01,596 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 16:36:01,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-19 16:36:01,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-19 16:36:01,803 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 16:36:01,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 16:36:01,804 INFO L85 PathProgramCache]: Analyzing trace with hash -961709975, now seen corresponding path program 1 times [2023-12-19 16:36:01,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 16:36:01,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146259447] [2023-12-19 16:36:01,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:36:01,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 16:36:01,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:36:01,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 16:36:01,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:36:01,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-19 16:36:02,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:36:02,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-19 16:36:02,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:36:02,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-19 16:36:02,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:36:02,052 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-19 16:36:02,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 16:36:02,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146259447] [2023-12-19 16:36:02,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146259447] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 16:36:02,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722036715] [2023-12-19 16:36:02,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:36:02,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 16:36:02,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 16:36:02,056 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) [2023-12-19 16:36:02,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-19 16:36:02,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:36:02,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-19 16:36:02,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 16:36:02,223 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-19 16:36:02,223 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 16:36:02,298 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 16:36:02,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722036715] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 16:36:02,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 16:36:02,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 8 [2023-12-19 16:36:02,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040203501] [2023-12-19 16:36:02,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 16:36:02,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-19 16:36:02,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 16:36:02,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-19 16:36:02,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-12-19 16:36:02,303 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-19 16:36:02,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 16:36:02,406 INFO L93 Difference]: Finished difference Result 41 states and 53 transitions. [2023-12-19 16:36:02,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-19 16:36:02,407 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 31 [2023-12-19 16:36:02,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 16:36:02,411 INFO L225 Difference]: With dead ends: 41 [2023-12-19 16:36:02,411 INFO L226 Difference]: Without dead ends: 25 [2023-12-19 16:36:02,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-12-19 16:36:02,416 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 33 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 16:36:02,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 61 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 16:36:02,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-12-19 16:36:02,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2023-12-19 16:36:02,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-19 16:36:02,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2023-12-19 16:36:02,425 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 31 [2023-12-19 16:36:02,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 16:36:02,426 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2023-12-19 16:36:02,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-19 16:36:02,428 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2023-12-19 16:36:02,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-19 16:36:02,429 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 16:36:02,429 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 16:36:02,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-19 16:36:02,634 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,SelfDestructingSolverStorable1 [2023-12-19 16:36:02,635 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 16:36:02,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 16:36:02,635 INFO L85 PathProgramCache]: Analyzing trace with hash 2138016675, now seen corresponding path program 1 times [2023-12-19 16:36:02,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 16:36:02,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327899258] [2023-12-19 16:36:02,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:36:02,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 16:36:02,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:36:02,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 16:36:02,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:36:02,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-19 16:36:02,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:36:02,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-19 16:36:02,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:36:02,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-19 16:36:02,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:36:02,962 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-19 16:36:02,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 16:36:02,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327899258] [2023-12-19 16:36:02,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327899258] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 16:36:02,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 16:36:02,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-19 16:36:02,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122222607] [2023-12-19 16:36:02,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 16:36:02,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-19 16:36:02,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 16:36:02,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-19 16:36:02,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2023-12-19 16:36:02,964 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-19 16:36:03,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 16:36:03,094 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2023-12-19 16:36:03,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-19 16:36:03,094 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2023-12-19 16:36:03,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 16:36:03,096 INFO L225 Difference]: With dead ends: 34 [2023-12-19 16:36:03,096 INFO L226 Difference]: Without dead ends: 30 [2023-12-19 16:36:03,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-12-19 16:36:03,098 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 16:36:03,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 60 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 16:36:03,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-12-19 16:36:03,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2023-12-19 16:36:03,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-19 16:36:03,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2023-12-19 16:36:03,106 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 31 [2023-12-19 16:36:03,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 16:36:03,107 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2023-12-19 16:36:03,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-19 16:36:03,108 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2023-12-19 16:36:03,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-19 16:36:03,109 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 16:36:03,110 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 16:36:03,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-19 16:36:03,111 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 16:36:03,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 16:36:03,112 INFO L85 PathProgramCache]: Analyzing trace with hash 2139863717, now seen corresponding path program 1 times [2023-12-19 16:36:03,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 16:36:03,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320833847] [2023-12-19 16:36:03,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:36:03,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 16:36:03,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:36:03,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 16:36:03,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:36:03,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-19 16:36:03,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:36:03,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-19 16:36:03,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:36:03,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-19 16:36:03,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:36:03,310 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-19 16:36:03,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 16:36:03,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320833847] [2023-12-19 16:36:03,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320833847] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 16:36:03,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 16:36:03,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-19 16:36:03,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779596277] [2023-12-19 16:36:03,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 16:36:03,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 16:36:03,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 16:36:03,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 16:36:03,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-19 16:36:03,316 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-19 16:36:03,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 16:36:03,396 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2023-12-19 16:36:03,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-19 16:36:03,396 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2023-12-19 16:36:03,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 16:36:03,398 INFO L225 Difference]: With dead ends: 35 [2023-12-19 16:36:03,398 INFO L226 Difference]: Without dead ends: 28 [2023-12-19 16:36:03,398 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-12-19 16:36:03,399 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 24 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 16:36:03,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 66 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 16:36:03,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-12-19 16:36:03,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2023-12-19 16:36:03,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-19 16:36:03,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2023-12-19 16:36:03,408 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 31 [2023-12-19 16:36:03,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 16:36:03,409 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2023-12-19 16:36:03,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-19 16:36:03,409 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2023-12-19 16:36:03,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-19 16:36:03,411 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 16:36:03,411 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 16:36:03,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-19 16:36:03,411 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 16:36:03,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 16:36:03,412 INFO L85 PathProgramCache]: Analyzing trace with hash -497212319, now seen corresponding path program 1 times [2023-12-19 16:36:03,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 16:36:03,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910054876] [2023-12-19 16:36:03,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:36:03,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 16:36:03,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:36:04,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 16:36:04,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:36:04,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-19 16:36:04,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:36:04,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-19 16:36:04,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:36:04,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-19 16:36:04,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:36:04,396 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-12-19 16:36:04,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 16:36:04,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910054876] [2023-12-19 16:36:04,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910054876] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 16:36:04,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534975167] [2023-12-19 16:36:04,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:36:04,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 16:36:04,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 16:36:04,397 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) [2023-12-19 16:36:04,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-19 16:36:04,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:36:04,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 75 conjunts are in the unsatisfiable core [2023-12-19 16:36:04,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 16:36:04,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-19 16:36:04,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 7 [2023-12-19 16:36:04,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-19 16:36:04,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-19 16:36:04,717 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-12-19 16:36:04,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-12-19 16:36:04,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 20 treesize of output 15 [2023-12-19 16:36:04,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2023-12-19 16:36:04,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2023-12-19 16:36:04,863 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 16:36:04,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 16:36:05,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534975167] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 16:36:05,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 16:36:05,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 20 [2023-12-19 16:36:05,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085527077] [2023-12-19 16:36:05,102 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 16:36:05,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-19 16:36:05,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 16:36:05,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-19 16:36:05,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2023-12-19 16:36:05,103 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 20 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 16:36:05,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 16:36:05,638 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2023-12-19 16:36:05,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-19 16:36:05,638 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2023-12-19 16:36:05,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 16:36:05,639 INFO L225 Difference]: With dead ends: 41 [2023-12-19 16:36:05,639 INFO L226 Difference]: Without dead ends: 35 [2023-12-19 16:36:05,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2023-12-19 16:36:05,640 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 47 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 342 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 16:36:05,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 147 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 342 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 16:36:05,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-12-19 16:36:05,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2023-12-19 16:36:05,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-19 16:36:05,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2023-12-19 16:36:05,645 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 34 [2023-12-19 16:36:05,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 16:36:05,645 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2023-12-19 16:36:05,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 16:36:05,645 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2023-12-19 16:36:05,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-19 16:36:05,646 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 16:36:05,646 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 16:36:05,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-19 16:36:05,846 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 [2023-12-19 16:36:05,846 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 16:36:05,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 16:36:05,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1103031011, now seen corresponding path program 2 times [2023-12-19 16:36:05,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 16:36:05,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467257778] [2023-12-19 16:36:05,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:36:05,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 16:36:05,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:36:06,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 16:36:06,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:36:06,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-19 16:36:06,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:36:06,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-19 16:36:06,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:36:07,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-19 16:36:07,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:36:07,341 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 16:36:07,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 16:36:07,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467257778] [2023-12-19 16:36:07,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467257778] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 16:36:07,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361169576] [2023-12-19 16:36:07,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 16:36:07,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 16:36:07,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 16:36:07,342 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 16:36:07,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-19 16:36:07,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 16:36:07,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 16:36:07,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 106 conjunts are in the unsatisfiable core [2023-12-19 16:36:07,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 16:36:07,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-19 16:36:07,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 1 [2023-12-19 16:36:07,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-19 16:36:07,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-19 16:36:07,827 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2023-12-19 16:36:07,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 23 [2023-12-19 16:36:07,845 INFO L349 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2023-12-19 16:36:07,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2023-12-19 16:36:07,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-12-19 16:36:07,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-12-19 16:36:08,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:36:08,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 53 treesize of output 36 [2023-12-19 16:36:08,065 INFO L349 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2023-12-19 16:36:08,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 24 treesize of output 31 [2023-12-19 16:36:08,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:36:08,082 INFO L349 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2023-12-19 16:36:08,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2023-12-19 16:36:08,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-19 16:36:08,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 20 treesize of output 15 [2023-12-19 16:36:08,345 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-12-19 16:36:08,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 33 [2023-12-19 16:36:08,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-19 16:36:08,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-19 16:36:08,396 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 14 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-19 16:36:08,396 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 16:36:08,674 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-19 16:36:08,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 38 [2023-12-19 16:36:08,682 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-19 16:36:08,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2023-12-19 16:36:08,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361169576] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 16:36:08,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 16:36:08,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 35 [2023-12-19 16:36:08,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401130735] [2023-12-19 16:36:08,745 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 16:36:08,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-12-19 16:36:08,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 16:36:08,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-12-19 16:36:08,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1538, Unknown=0, NotChecked=0, Total=1640 [2023-12-19 16:36:08,746 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 35 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 30 states have internal predecessors, (49), 5 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2023-12-19 16:36:10,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 16:36:10,275 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2023-12-19 16:36:10,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-19 16:36:10,276 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 30 states have internal predecessors, (49), 5 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) Word has length 37 [2023-12-19 16:36:10,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 16:36:10,277 INFO L225 Difference]: With dead ends: 48 [2023-12-19 16:36:10,277 INFO L226 Difference]: Without dead ends: 44 [2023-12-19 16:36:10,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=351, Invalid=3189, Unknown=0, NotChecked=0, Total=3540 [2023-12-19 16:36:10,278 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 115 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-19 16:36:10,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 208 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-19 16:36:10,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-12-19 16:36:10,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2023-12-19 16:36:10,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-19 16:36:10,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2023-12-19 16:36:10,283 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 37 [2023-12-19 16:36:10,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 16:36:10,283 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2023-12-19 16:36:10,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 30 states have internal predecessors, (49), 5 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2023-12-19 16:36:10,283 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2023-12-19 16:36:10,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-19 16:36:10,283 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 16:36:10,284 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 16:36:10,306 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-19 16:36:10,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 16:36:10,506 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 16:36:10,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 16:36:10,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1104878053, now seen corresponding path program 1 times [2023-12-19 16:36:10,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 16:36:10,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229765415] [2023-12-19 16:36:10,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:36:10,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 16:36:10,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:36:11,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-12-19 16:36:11,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:36:11,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-12-19 16:36:11,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:36:11,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-12-19 16:36:11,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:36:11,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-12-19 16:36:11,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:36:11,250 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 16:36:11,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 16:36:11,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229765415] [2023-12-19 16:36:11,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229765415] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 16:36:11,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728426035] [2023-12-19 16:36:11,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:36:11,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 16:36:11,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 16:36:11,252 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 16:36:11,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-19 16:36:11,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 16:36:11,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 60 conjunts are in the unsatisfiable core [2023-12-19 16:36:11,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 16:36:11,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-12-19 16:36:11,449 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-19 16:36:11,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-19 16:36:11,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 12 [2023-12-19 16:36:11,592 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2023-12-19 16:36:11,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 24 [2023-12-19 16:36:11,612 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-12-19 16:36:11,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2023-12-19 16:36:11,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-12-19 16:36:11,729 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-12-19 16:36:11,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 15 [2023-12-19 16:36:11,732 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 16 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-19 16:36:11,733 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 16:36:11,856 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-19 16:36:11,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2023-12-19 16:36:11,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728426035] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 16:36:11,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 16:36:11,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 28 [2023-12-19 16:36:11,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761713249] [2023-12-19 16:36:11,900 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 16:36:11,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-19 16:36:11,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 16:36:11,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-19 16:36:11,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=842, Unknown=1, NotChecked=0, Total=930 [2023-12-19 16:36:11,902 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 28 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 4 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-19 16:36:12,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 16:36:12,907 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2023-12-19 16:36:12,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-19 16:36:12,907 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 4 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) Word has length 37 [2023-12-19 16:36:12,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 16:36:12,908 INFO L225 Difference]: With dead ends: 63 [2023-12-19 16:36:12,908 INFO L226 Difference]: Without dead ends: 52 [2023-12-19 16:36:12,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=459, Invalid=2510, Unknown=1, NotChecked=0, Total=2970 [2023-12-19 16:36:12,909 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 82 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-19 16:36:12,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 156 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-19 16:36:12,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-12-19 16:36:12,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2023-12-19 16:36:12,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 36 states have internal predecessors, (39), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-19 16:36:12,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2023-12-19 16:36:12,915 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 37 [2023-12-19 16:36:12,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 16:36:12,915 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2023-12-19 16:36:12,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 23 states have internal predecessors, (46), 4 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2023-12-19 16:36:12,915 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2023-12-19 16:36:12,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-19 16:36:12,916 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 16:36:12,916 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 16:36:12,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-19 16:36:13,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 16:36:13,117 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 16:36:13,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 16:36:13,117 INFO L85 PathProgramCache]: Analyzing trace with hash -184910559, now seen corresponding path program 3 times [2023-12-19 16:36:13,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 16:36:13,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324470736] [2023-12-19 16:36:13,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 16:36:13,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 16:36:13,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-19 16:36:13,141 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-19 16:36:13,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-19 16:36:13,187 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-19 16:36:13,188 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-19 16:36:13,188 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-19 16:36:13,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-19 16:36:13,194 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1] [2023-12-19 16:36:13,197 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-19 16:36:13,244 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.12 04:36:13 BoogieIcfgContainer [2023-12-19 16:36:13,244 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-19 16:36:13,245 INFO L158 Benchmark]: Toolchain (without parser) took 13180.53ms. Allocated memory was 297.8MB in the beginning and 549.5MB in the end (delta: 251.7MB). Free memory was 244.6MB in the beginning and 384.7MB in the end (delta: -140.1MB). Peak memory consumption was 112.4MB. Max. memory is 8.0GB. [2023-12-19 16:36:13,246 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 228.6MB. Free memory is still 178.4MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-19 16:36:13,246 INFO L158 Benchmark]: CACSL2BoogieTranslator took 354.16ms. Allocated memory is still 297.8MB. Free memory was 244.3MB in the beginning and 226.8MB in the end (delta: 17.5MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. [2023-12-19 16:36:13,246 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.77ms. Allocated memory is still 297.8MB. Free memory was 226.8MB in the beginning and 225.0MB in the end (delta: 1.8MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-19 16:36:13,246 INFO L158 Benchmark]: Boogie Preprocessor took 45.39ms. Allocated memory is still 297.8MB. Free memory was 225.0MB in the beginning and 222.6MB in the end (delta: 2.4MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2023-12-19 16:36:13,246 INFO L158 Benchmark]: RCFGBuilder took 273.65ms. Allocated memory is still 297.8MB. Free memory was 222.6MB in the beginning and 260.7MB in the end (delta: -38.1MB). Peak memory consumption was 15.2MB. Max. memory is 8.0GB. [2023-12-19 16:36:13,247 INFO L158 Benchmark]: TraceAbstraction took 12476.95ms. Allocated memory was 297.8MB in the beginning and 549.5MB in the end (delta: 251.7MB). Free memory was 260.1MB in the beginning and 384.7MB in the end (delta: -124.5MB). Peak memory consumption was 127.6MB. Max. memory is 8.0GB. [2023-12-19 16:36:13,247 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 228.6MB. Free memory is still 178.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 354.16ms. Allocated memory is still 297.8MB. Free memory was 244.3MB in the beginning and 226.8MB in the end (delta: 17.5MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 25.77ms. Allocated memory is still 297.8MB. Free memory was 226.8MB in the beginning and 225.0MB in the end (delta: 1.8MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 45.39ms. Allocated memory is still 297.8MB. Free memory was 225.0MB in the beginning and 222.6MB in the end (delta: 2.4MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * RCFGBuilder took 273.65ms. Allocated memory is still 297.8MB. Free memory was 222.6MB in the beginning and 260.7MB in the end (delta: -38.1MB). Peak memory consumption was 15.2MB. Max. memory is 8.0GB. * TraceAbstraction took 12476.95ms. Allocated memory was 297.8MB in the beginning and 549.5MB in the end (delta: 251.7MB). Free memory was 260.1MB in the beginning and 384.7MB in the end (delta: -124.5MB). Peak memory consumption was 127.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L533] mlist *head; [L554] int i; [L555] mlist *mylist, *temp; VAL [head={0:0}] [L556] CALL insert_list(mylist,2) VAL [\old(head)={0:0}, \old(k)=2, head={0:0}, l={57:54}] [L542] l = (mlist*)malloc(sizeof(mlist)) [L543] l->key = k VAL [\old(head)={0:0}, \old(k)=2, head={0:0}, k=2, l={-1:0}, l={57:54}] [L544] COND TRUE head==((void *)0) [L545] l->next = ((void *)0) VAL [\old(head)={0:0}, \old(k)=2, head={0:0}, k=2, l={-1:0}, l={57:54}] [L550] head = l [L551] return 0; [L556] RET insert_list(mylist,2) VAL [head={-1:0}, mylist={57:54}] [L557] CALL insert_list(mylist,5) VAL [\old(head)={-1:0}, \old(k)=5, head={-1:0}, l={57:54}] [L542] l = (mlist*)malloc(sizeof(mlist)) [L543] l->key = k VAL [\old(head)={-1:0}, \old(k)=5, head={-1:0}, k=5, l={-2:0}, l={57:54}] [L544] COND FALSE !(head==((void *)0)) [L547] l->key = k [L548] l->next = head VAL [\old(head)={-1:0}, \old(k)=5, head={-1:0}, k=5, l={-2:0}, l={57:54}] [L550] head = l [L551] return 0; [L557] RET insert_list(mylist,5) VAL [head={-2:0}, mylist={57:54}] [L558] CALL insert_list(mylist,1) VAL [\old(head)={-2:0}, \old(k)=1, head={-2:0}, l={57:54}] [L542] l = (mlist*)malloc(sizeof(mlist)) [L543] l->key = k VAL [\old(head)={-2:0}, \old(k)=1, head={-2:0}, k=1, l={-3:0}, l={57:54}] [L544] COND FALSE !(head==((void *)0)) [L547] l->key = k [L548] l->next = head VAL [\old(head)={-2:0}, \old(k)=1, head={-2:0}, k=1, l={-3:0}, l={57:54}] [L550] head = l [L551] return 0; [L558] RET insert_list(mylist,1) VAL [head={-3:0}, mylist={57:54}] [L559] CALL insert_list(mylist,3) VAL [\old(head)={-3:0}, \old(k)=3, head={-3:0}, l={57:54}] [L542] l = (mlist*)malloc(sizeof(mlist)) [L543] l->key = k VAL [\old(head)={-3:0}, \old(k)=3, head={-3:0}, k=3, l={-4:0}, l={57:54}] [L544] COND FALSE !(head==((void *)0)) [L547] l->key = k [L548] l->next = head VAL [\old(head)={-3:0}, \old(k)=3, head={-3:0}, k=3, l={-4:0}, l={57:54}] [L550] head = l [L551] return 0; [L559] RET insert_list(mylist,3) VAL [head={-4:0}, mylist={57:54}] [L560] CALL, EXPR search_list(head,2) [L535] l = head VAL [\old(k)=2, head={-4:0}, k=2, l={-4:0}, l={-4:0}] [L536] l!=((void *)0) && l->key!=k VAL [\old(k)=2, head={-4:0}, k=2, l={-4:0}, l={-4:0}] [L536] l!=((void *)0) && l->key!=k [L536] EXPR l->key [L536] l!=((void *)0) && l->key!=k VAL [\old(k)=2, head={-4:0}, k=2, l={-4:0}, l={-4:0}] [L536] COND TRUE l!=((void *)0) && l->key!=k [L537] EXPR l->next [L537] l = l->next [L536] l!=((void *)0) && l->key!=k VAL [\old(k)=2, head={-4:0}, k=2, l={-3:0}, l={-4:0}] [L536] l!=((void *)0) && l->key!=k [L536] EXPR l->key [L536] l!=((void *)0) && l->key!=k VAL [\old(k)=2, head={-4:0}, k=2, l={-3:0}, l={-4:0}] [L536] COND TRUE l!=((void *)0) && l->key!=k [L537] EXPR l->next [L537] l = l->next [L536] l!=((void *)0) && l->key!=k VAL [\old(k)=2, head={-4:0}, k=2, l={-2:0}, l={-4:0}] [L536] l!=((void *)0) && l->key!=k [L536] EXPR l->key [L536] l!=((void *)0) && l->key!=k VAL [\old(k)=2, head={-4:0}, k=2, l={-2:0}, l={-4:0}] [L536] COND TRUE l!=((void *)0) && l->key!=k [L537] EXPR l->next [L537] l = l->next [L536] l!=((void *)0) && l->key!=k VAL [\old(k)=2, head={-4:0}, k=2, l={-1:0}, l={-4:0}] [L536] l!=((void *)0) && l->key!=k [L536] EXPR l->key [L536] l!=((void *)0) && l->key!=k VAL [\old(k)=2, head={-4:0}, k=2, l={-1:0}, l={-4:0}] [L536] COND FALSE !(l!=((void *)0) && l->key!=k) [L539] return l; [L560] RET, EXPR search_list(head,2) [L560] temp = search_list(head,2) [L561] EXPR temp->key [L561] CALL __VERIFIER_assert(temp->key==1) [L14] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, head={-4:0}] [L15] reach_error() VAL [\old(cond)=0, cond=0, head={-4:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 12.4s, OverallIterations: 8, TraceHistogramMax: 4, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 3.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 328 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 328 mSDsluCounter, 724 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 618 mSDsCounter, 101 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1603 IncrementalHoareTripleChecker+Invalid, 1704 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 101 mSolverCounterUnsat, 106 mSDtfsCounter, 1603 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 431 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 3.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=7, InterpolantAutomatonStates: 96, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 14 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 6.6s InterpolantComputationTime, 438 NumberOfCodeBlocks, 438 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 416 ConstructedInterpolants, 6 QuantifiedInterpolants, 4122 SizeOfPredicates, 50 NumberOfNonLiveVariables, 1905 ConjunctsInSsa, 251 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 230/354 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 RESULT: Ultimate proved your program to be incorrect! [2023-12-19 16:36:13,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...