/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/loops/n.c24.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-19 17:29:52,667 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-19 17:29:52,738 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 17:29:52,744 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-19 17:29:52,744 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-19 17:29:52,766 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-19 17:29:52,766 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-19 17:29:52,766 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-19 17:29:52,767 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-19 17:29:52,770 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-19 17:29:52,770 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-19 17:29:52,770 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-19 17:29:52,771 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-19 17:29:52,772 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-19 17:29:52,772 INFO L153 SettingsManager]: * Use SBE=true [2023-12-19 17:29:52,772 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-19 17:29:52,772 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-19 17:29:52,772 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-19 17:29:52,772 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-19 17:29:52,773 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-19 17:29:52,773 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-19 17:29:52,773 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-19 17:29:52,773 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-19 17:29:52,773 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-19 17:29:52,773 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-19 17:29:52,774 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-19 17:29:52,774 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-19 17:29:52,774 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-19 17:29:52,774 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-19 17:29:52,774 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-19 17:29:52,775 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-19 17:29:52,775 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-19 17:29:52,775 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 17:29:52,775 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-19 17:29:52,775 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-19 17:29:52,776 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-19 17:29:52,776 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-19 17:29:52,776 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-19 17:29:52,776 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-19 17:29:52,776 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-19 17:29:52,776 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-19 17:29:52,776 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-19 17:29:52,776 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-19 17:29:52,776 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-19 17:29:52,975 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-19 17:29:52,992 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-19 17:29:52,994 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-19 17:29:52,995 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-19 17:29:52,995 INFO L274 PluginConnector]: CDTParser initialized [2023-12-19 17:29:52,996 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/n.c24.i [2023-12-19 17:29:54,056 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-19 17:29:54,226 INFO L384 CDTParser]: Found 1 translation units. [2023-12-19 17:29:54,227 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c24.i [2023-12-19 17:29:54,236 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a5683098/35c2304043e94810ac17964172cb4978/FLAG352c9d577 [2023-12-19 17:29:54,247 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a5683098/35c2304043e94810ac17964172cb4978 [2023-12-19 17:29:54,249 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-19 17:29:54,250 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-19 17:29:54,253 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-19 17:29:54,253 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-19 17:29:54,256 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-19 17:29:54,257 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 05:29:54" (1/1) ... [2023-12-19 17:29:54,257 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56b5dfc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:29:54, skipping insertion in model container [2023-12-19 17:29:54,257 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 05:29:54" (1/1) ... [2023-12-19 17:29:54,283 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-19 17:29:54,395 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c24.i[805,818] [2023-12-19 17:29:54,424 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 17:29:54,432 INFO L202 MainTranslator]: Completed pre-run [2023-12-19 17:29:54,440 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/n.c24.i[805,818] [2023-12-19 17:29:54,452 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 17:29:54,467 INFO L206 MainTranslator]: Completed translation [2023-12-19 17:29:54,467 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:29:54 WrapperNode [2023-12-19 17:29:54,467 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-19 17:29:54,469 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-19 17:29:54,469 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-19 17:29:54,469 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-19 17:29:54,474 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:29:54" (1/1) ... [2023-12-19 17:29:54,480 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:29:54" (1/1) ... [2023-12-19 17:29:54,498 INFO L138 Inliner]: procedures = 68, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 159 [2023-12-19 17:29:54,498 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-19 17:29:54,499 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-19 17:29:54,499 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-19 17:29:54,499 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-19 17:29:54,505 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:29:54" (1/1) ... [2023-12-19 17:29:54,505 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:29:54" (1/1) ... [2023-12-19 17:29:54,507 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:29:54" (1/1) ... [2023-12-19 17:29:54,517 INFO L175 MemorySlicer]: Split 21 memory accesses to 4 slices as follows [2, 8, 2, 9]. 43 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0, 0]. The 6 writes are split as follows [0, 0, 1, 5]. [2023-12-19 17:29:54,517 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:29:54" (1/1) ... [2023-12-19 17:29:54,517 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:29:54" (1/1) ... [2023-12-19 17:29:54,526 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:29:54" (1/1) ... [2023-12-19 17:29:54,528 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:29:54" (1/1) ... [2023-12-19 17:29:54,530 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:29:54" (1/1) ... [2023-12-19 17:29:54,531 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:29:54" (1/1) ... [2023-12-19 17:29:54,533 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-19 17:29:54,534 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-19 17:29:54,534 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-19 17:29:54,534 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-19 17:29:54,534 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:29:54" (1/1) ... [2023-12-19 17:29:54,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 17:29:54,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:29:54,566 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 17:29:54,567 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 17:29:54,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-19 17:29:54,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2023-12-19 17:29:54,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2023-12-19 17:29:54,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#2 [2023-12-19 17:29:54,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#3 [2023-12-19 17:29:54,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-19 17:29:54,585 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-19 17:29:54,585 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-19 17:29:54,585 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-19 17:29:54,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-12-19 17:29:54,586 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-19 17:29:54,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-19 17:29:54,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-19 17:29:54,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-19 17:29:54,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-12-19 17:29:54,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-19 17:29:54,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-19 17:29:54,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-19 17:29:54,587 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-12-19 17:29:54,587 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int#0 [2023-12-19 17:29:54,587 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int#1 [2023-12-19 17:29:54,587 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int#2 [2023-12-19 17:29:54,587 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int#3 [2023-12-19 17:29:54,587 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-19 17:29:54,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-19 17:29:54,654 INFO L241 CfgBuilder]: Building ICFG [2023-12-19 17:29:54,656 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-19 17:29:54,785 INFO L282 CfgBuilder]: Performing block encoding [2023-12-19 17:29:54,811 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-19 17:29:54,812 INFO L309 CfgBuilder]: Removed 4 assume(true) statements. [2023-12-19 17:29:54,812 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 05:29:54 BoogieIcfgContainer [2023-12-19 17:29:54,812 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-19 17:29:54,814 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-19 17:29:54,814 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-19 17:29:54,816 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-19 17:29:54,816 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.12 05:29:54" (1/3) ... [2023-12-19 17:29:54,816 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5efb2b50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 05:29:54, skipping insertion in model container [2023-12-19 17:29:54,817 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 05:29:54" (2/3) ... [2023-12-19 17:29:54,817 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5efb2b50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 05:29:54, skipping insertion in model container [2023-12-19 17:29:54,817 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 05:29:54" (3/3) ... [2023-12-19 17:29:54,818 INFO L112 eAbstractionObserver]: Analyzing ICFG n.c24.i [2023-12-19 17:29:54,830 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-19 17:29:54,830 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-19 17:29:54,860 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-19 17:29:54,865 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;@4ff26dfc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-19 17:29:54,865 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-19 17:29:54,868 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:29:54,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-19 17:29:54,872 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:29:54,872 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:29:54,873 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:29:54,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:29:54,876 INFO L85 PathProgramCache]: Analyzing trace with hash -230994160, now seen corresponding path program 1 times [2023-12-19 17:29:54,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:29:54,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312995232] [2023-12-19 17:29:54,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:29:54,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:29:54,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:29:55,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 17:29:55,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:29:55,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312995232] [2023-12-19 17:29:55,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312995232] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 17:29:55,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 17:29:55,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-19 17:29:55,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475054260] [2023-12-19 17:29:55,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 17:29:55,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-19 17:29:55,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:29:55,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-19 17:29:55,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 17:29:55,050 INFO L87 Difference]: Start difference. First operand has 28 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 27 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:29:55,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:29:55,103 INFO L93 Difference]: Finished difference Result 74 states and 126 transitions. [2023-12-19 17:29:55,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-19 17:29:55,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-19 17:29:55,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:29:55,112 INFO L225 Difference]: With dead ends: 74 [2023-12-19 17:29:55,112 INFO L226 Difference]: Without dead ends: 44 [2023-12-19 17:29:55,114 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-19 17:29:55,118 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 29 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 17:29:55,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 55 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 17:29:55,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-12-19 17:29:55,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 27. [2023-12-19 17:29:55,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:29:55,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2023-12-19 17:29:55,140 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 7 [2023-12-19 17:29:55,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:29:55,141 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2023-12-19 17:29:55,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:29:55,141 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2023-12-19 17:29:55,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-19 17:29:55,141 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:29:55,141 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:29:55,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-19 17:29:55,142 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:29:55,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:29:55,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1551984996, now seen corresponding path program 1 times [2023-12-19 17:29:55,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:29:55,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42007096] [2023-12-19 17:29:55,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:29:55,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:29:55,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:29:55,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-19 17:29:55,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:29:55,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42007096] [2023-12-19 17:29:55,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42007096] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:29:55,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169272595] [2023-12-19 17:29:55,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:29:55,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:29:55,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:29:55,227 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 17:29:55,246 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 17:29:55,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:29:55,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-19 17:29:55,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:29:55,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-19 17:29:55,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:29:55,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-19 17:29:55,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169272595] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:29:55,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:29:55,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-12-19 17:29:55,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057392512] [2023-12-19 17:29:55,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:29:55,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 17:29:55,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:29:55,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 17:29:55,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-19 17:29:55,381 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:29:55,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:29:55,488 INFO L93 Difference]: Finished difference Result 108 states and 160 transitions. [2023-12-19 17:29:55,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 17:29:55,488 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-12-19 17:29:55,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:29:55,491 INFO L225 Difference]: With dead ends: 108 [2023-12-19 17:29:55,491 INFO L226 Difference]: Without dead ends: 84 [2023-12-19 17:29:55,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-12-19 17:29:55,492 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 130 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 17:29:55,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 105 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 17:29:55,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-12-19 17:29:55,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2023-12-19 17:29:55,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.4578313253012047) internal successors, (121), 83 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:29:55,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 121 transitions. [2023-12-19 17:29:55,500 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 121 transitions. Word has length 13 [2023-12-19 17:29:55,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:29:55,501 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 121 transitions. [2023-12-19 17:29:55,501 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:29:55,501 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 121 transitions. [2023-12-19 17:29:55,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-19 17:29:55,502 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:29:55,502 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:29:55,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-19 17:29:55,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:29:55,708 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:29:55,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:29:55,709 INFO L85 PathProgramCache]: Analyzing trace with hash -370254069, now seen corresponding path program 2 times [2023-12-19 17:29:55,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:29:55,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915149351] [2023-12-19 17:29:55,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:29:55,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:29:55,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:29:55,863 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-12-19 17:29:55,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:29:55,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915149351] [2023-12-19 17:29:55,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915149351] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 17:29:55,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 17:29:55,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-19 17:29:55,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004021362] [2023-12-19 17:29:55,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 17:29:55,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 17:29:55,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:29:55,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 17:29:55,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-19 17:29:55,865 INFO L87 Difference]: Start difference. First operand 84 states and 121 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:29:55,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:29:55,912 INFO L93 Difference]: Finished difference Result 158 states and 231 transitions. [2023-12-19 17:29:55,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-19 17:29:55,913 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-12-19 17:29:55,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:29:55,920 INFO L225 Difference]: With dead ends: 158 [2023-12-19 17:29:55,920 INFO L226 Difference]: Without dead ends: 154 [2023-12-19 17:29:55,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-19 17:29:55,923 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 24 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 17:29:55,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 85 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 17:29:55,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-12-19 17:29:55,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 85. [2023-12-19 17:29:55,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.4642857142857142) internal successors, (123), 84 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:29:55,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 123 transitions. [2023-12-19 17:29:55,940 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 123 transitions. Word has length 31 [2023-12-19 17:29:55,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:29:55,941 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 123 transitions. [2023-12-19 17:29:55,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:29:55,941 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 123 transitions. [2023-12-19 17:29:55,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-19 17:29:55,942 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:29:55,942 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:29:55,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-19 17:29:55,942 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:29:55,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:29:55,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1016351884, now seen corresponding path program 1 times [2023-12-19 17:29:55,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:29:55,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047594077] [2023-12-19 17:29:55,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:29:55,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:29:55,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:29:56,143 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-12-19 17:29:56,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:29:56,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047594077] [2023-12-19 17:29:56,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047594077] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:29:56,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804655676] [2023-12-19 17:29:56,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:29:56,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:29:56,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:29:56,145 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 17:29:56,170 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 17:29:56,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:29:56,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-19 17:29:56,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:29:56,257 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-12-19 17:29:56,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:29:56,312 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-12-19 17:29:56,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804655676] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:29:56,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:29:56,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-12-19 17:29:56,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850703853] [2023-12-19 17:29:56,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:29:56,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-19 17:29:56,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:29:56,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-19 17:29:56,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-12-19 17:29:56,321 INFO L87 Difference]: Start difference. First operand 85 states and 123 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:29:56,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:29:56,471 INFO L93 Difference]: Finished difference Result 298 states and 445 transitions. [2023-12-19 17:29:56,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-19 17:29:56,471 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-12-19 17:29:56,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:29:56,472 INFO L225 Difference]: With dead ends: 298 [2023-12-19 17:29:56,473 INFO L226 Difference]: Without dead ends: 219 [2023-12-19 17:29:56,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-12-19 17:29:56,476 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 702 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 702 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 17:29:56,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [702 Valid, 210 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 17:29:56,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2023-12-19 17:29:56,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 199. [2023-12-19 17:29:56,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.4696969696969697) internal successors, (291), 198 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:29:56,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 291 transitions. [2023-12-19 17:29:56,502 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 291 transitions. Word has length 35 [2023-12-19 17:29:56,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:29:56,502 INFO L495 AbstractCegarLoop]: Abstraction has 199 states and 291 transitions. [2023-12-19 17:29:56,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:29:56,503 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 291 transitions. [2023-12-19 17:29:56,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-12-19 17:29:56,504 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:29:56,504 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:29:56,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-19 17:29:56,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-12-19 17:29:56,712 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:29:56,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:29:56,712 INFO L85 PathProgramCache]: Analyzing trace with hash -838044372, now seen corresponding path program 2 times [2023-12-19 17:29:56,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:29:56,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379271226] [2023-12-19 17:29:56,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:29:56,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:29:56,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:29:57,004 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2023-12-19 17:29:57,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:29:57,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379271226] [2023-12-19 17:29:57,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379271226] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:29:57,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128913911] [2023-12-19 17:29:57,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 17:29:57,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:29:57,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:29:57,008 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 17:29:57,031 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 17:29:57,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 17:29:57,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 17:29:57,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-19 17:29:57,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:29:57,160 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2023-12-19 17:29:57,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:29:57,321 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2023-12-19 17:29:57,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128913911] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:29:57,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:29:57,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-12-19 17:29:57,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210665651] [2023-12-19 17:29:57,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:29:57,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-19 17:29:57,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:29:57,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-19 17:29:57,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-12-19 17:29:57,328 INFO L87 Difference]: Start difference. First operand 199 states and 291 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:29:57,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:29:57,632 INFO L93 Difference]: Finished difference Result 652 states and 979 transitions. [2023-12-19 17:29:57,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-19 17:29:57,632 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2023-12-19 17:29:57,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:29:57,633 INFO L225 Difference]: With dead ends: 652 [2023-12-19 17:29:57,633 INFO L226 Difference]: Without dead ends: 465 [2023-12-19 17:29:57,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-12-19 17:29:57,636 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1690 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1690 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 17:29:57,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1690 Valid, 429 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 17:29:57,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2023-12-19 17:29:57,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 427. [2023-12-19 17:29:57,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 426 states have (on average 1.471830985915493) internal successors, (627), 426 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:29:57,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 627 transitions. [2023-12-19 17:29:57,664 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 627 transitions. Word has length 71 [2023-12-19 17:29:57,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:29:57,665 INFO L495 AbstractCegarLoop]: Abstraction has 427 states and 627 transitions. [2023-12-19 17:29:57,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:29:57,665 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 627 transitions. [2023-12-19 17:29:57,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-12-19 17:29:57,669 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:29:57,669 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:29:57,676 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 17:29:57,874 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 17:29:57,874 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:29:57,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:29:57,875 INFO L85 PathProgramCache]: Analyzing trace with hash 254447212, now seen corresponding path program 3 times [2023-12-19 17:29:57,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:29:57,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959058117] [2023-12-19 17:29:57,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:29:57,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:29:57,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:29:58,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1199 trivial. 0 not checked. [2023-12-19 17:29:58,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:29:58,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959058117] [2023-12-19 17:29:58,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959058117] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:29:58,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090997280] [2023-12-19 17:29:58,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 17:29:58,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:29:58,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:29:58,518 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 17:29:58,522 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 17:29:58,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-19 17:29:58,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 17:29:58,604 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-19 17:29:58,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:29:58,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 1366 trivial. 0 not checked. [2023-12-19 17:29:58,684 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:29:58,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 85 proven. 1 refuted. 0 times theorem prover too weak. 1366 trivial. 0 not checked. [2023-12-19 17:29:58,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090997280] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:29:58,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:29:58,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 6, 6] total 33 [2023-12-19 17:29:58,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933665683] [2023-12-19 17:29:58,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:29:58,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-19 17:29:58,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:29:58,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-19 17:29:58,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=730, Unknown=0, NotChecked=0, Total=1056 [2023-12-19 17:29:58,814 INFO L87 Difference]: Start difference. First operand 427 states and 627 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:30:03,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:30:03,322 INFO L93 Difference]: Finished difference Result 2229 states and 3325 transitions. [2023-12-19 17:30:03,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2023-12-19 17:30:03,322 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2023-12-19 17:30:03,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:30:03,328 INFO L225 Difference]: With dead ends: 2229 [2023-12-19 17:30:03,329 INFO L226 Difference]: Without dead ends: 1820 [2023-12-19 17:30:03,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 349 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11093 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=8191, Invalid=22609, Unknown=0, NotChecked=0, Total=30800 [2023-12-19 17:30:03,339 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 12533 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 589 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12533 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 589 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-19 17:30:03,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12533 Valid, 537 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [589 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-19 17:30:03,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1820 states. [2023-12-19 17:30:03,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1820 to 488. [2023-12-19 17:30:03,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 487 states have (on average 1.486652977412731) internal successors, (724), 487 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:30:03,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 724 transitions. [2023-12-19 17:30:03,374 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 724 transitions. Word has length 143 [2023-12-19 17:30:03,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:30:03,375 INFO L495 AbstractCegarLoop]: Abstraction has 488 states and 724 transitions. [2023-12-19 17:30:03,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:30:03,376 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 724 transitions. [2023-12-19 17:30:03,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-12-19 17:30:03,380 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:30:03,380 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:30:03,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-19 17:30:03,585 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 17:30:03,585 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:30:03,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:30:03,586 INFO L85 PathProgramCache]: Analyzing trace with hash 2047865216, now seen corresponding path program 4 times [2023-12-19 17:30:03,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:30:03,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213677516] [2023-12-19 17:30:03,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:30:03,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:30:03,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:30:04,217 INFO L134 CoverageAnalysis]: Checked inductivity of 1680 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2023-12-19 17:30:04,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:30:04,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213677516] [2023-12-19 17:30:04,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213677516] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:30:04,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972045261] [2023-12-19 17:30:04,217 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-19 17:30:04,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:30:04,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:30:04,218 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 17:30:04,243 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 17:30:04,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-19 17:30:04,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 17:30:04,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 650 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-19 17:30:04,379 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:30:04,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1680 backedges. 0 proven. 1376 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2023-12-19 17:30:04,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:30:05,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1680 backedges. 0 proven. 1376 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2023-12-19 17:30:05,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972045261] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:30:05,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:30:05,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 26] total 51 [2023-12-19 17:30:05,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421276225] [2023-12-19 17:30:05,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:30:05,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-12-19 17:30:05,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:30:05,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-12-19 17:30:05,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2023-12-19 17:30:05,158 INFO L87 Difference]: Start difference. First operand 488 states and 724 transitions. Second operand has 51 states, 51 states have (on average 5.568627450980392) internal successors, (284), 51 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:30:06,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:30:06,301 INFO L93 Difference]: Finished difference Result 2553 states and 3999 transitions. [2023-12-19 17:30:06,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-12-19 17:30:06,303 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 5.568627450980392) internal successors, (284), 51 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 161 [2023-12-19 17:30:06,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:30:06,310 INFO L225 Difference]: With dead ends: 2553 [2023-12-19 17:30:06,310 INFO L226 Difference]: Without dead ends: 2090 [2023-12-19 17:30:06,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2023-12-19 17:30:06,311 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 2892 mSDsluCounter, 870 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2892 SdHoareTripleChecker+Valid, 894 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-19 17:30:06,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2892 Valid, 894 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-19 17:30:06,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2023-12-19 17:30:06,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 963. [2023-12-19 17:30:06,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 1.4802494802494803) internal successors, (1424), 962 states have internal predecessors, (1424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:30:06,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1424 transitions. [2023-12-19 17:30:06,369 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1424 transitions. Word has length 161 [2023-12-19 17:30:06,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:30:06,369 INFO L495 AbstractCegarLoop]: Abstraction has 963 states and 1424 transitions. [2023-12-19 17:30:06,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 5.568627450980392) internal successors, (284), 51 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:30:06,369 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1424 transitions. [2023-12-19 17:30:06,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2023-12-19 17:30:06,375 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:30:06,375 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:30:06,383 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 17:30:06,581 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 17:30:06,581 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:30:06,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:30:06,583 INFO L85 PathProgramCache]: Analyzing trace with hash -348907185, now seen corresponding path program 5 times [2023-12-19 17:30:06,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:30:06,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793087803] [2023-12-19 17:30:06,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:30:06,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:30:06,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:30:08,681 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 5904 trivial. 0 not checked. [2023-12-19 17:30:08,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:30:08,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793087803] [2023-12-19 17:30:08,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793087803] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:30:08,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183391072] [2023-12-19 17:30:08,681 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-19 17:30:08,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:30:08,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:30:08,683 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 17:30:08,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-19 17:32:19,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2023-12-19 17:32:19,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 17:32:19,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 1200 conjuncts, 50 conjunts are in the unsatisfiable core [2023-12-19 17:32:19,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:32:19,321 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 5904 trivial. 0 not checked. [2023-12-19 17:32:19,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:32:21,467 INFO L134 CoverageAnalysis]: Checked inductivity of 7080 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 5904 trivial. 0 not checked. [2023-12-19 17:32:21,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183391072] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:32:21,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:32:21,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2023-12-19 17:32:21,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665150444] [2023-12-19 17:32:21,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:32:21,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-12-19 17:32:21,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:32:21,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-12-19 17:32:21,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2023-12-19 17:32:21,472 INFO L87 Difference]: Start difference. First operand 963 states and 1424 transitions. Second operand has 101 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 100 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:32:28,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:32:28,831 INFO L93 Difference]: Finished difference Result 5078 states and 7949 transitions. [2023-12-19 17:32:28,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-12-19 17:32:28,831 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 100 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 311 [2023-12-19 17:32:28,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:32:28,842 INFO L225 Difference]: With dead ends: 5078 [2023-12-19 17:32:28,842 INFO L226 Difference]: Without dead ends: 4165 [2023-12-19 17:32:28,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 670 GetRequests, 571 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2023-12-19 17:32:28,845 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 10608 mSDsluCounter, 1776 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 460 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10608 SdHoareTripleChecker+Valid, 1800 SdHoareTripleChecker+Invalid, 1461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 460 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-19 17:32:28,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10608 Valid, 1800 Invalid, 1461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [460 Valid, 1001 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-19 17:32:28,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4165 states. [2023-12-19 17:32:28,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4165 to 1913. [2023-12-19 17:32:28,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1913 states, 1912 states have (on average 1.4769874476987448) internal successors, (2824), 1912 states have internal predecessors, (2824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:32:28,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1913 states to 1913 states and 2824 transitions. [2023-12-19 17:32:28,938 INFO L78 Accepts]: Start accepts. Automaton has 1913 states and 2824 transitions. Word has length 311 [2023-12-19 17:32:28,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:32:28,938 INFO L495 AbstractCegarLoop]: Abstraction has 1913 states and 2824 transitions. [2023-12-19 17:32:28,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1485148514851484) internal successors, (116), 100 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:32:28,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1913 states and 2824 transitions. [2023-12-19 17:32:28,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 612 [2023-12-19 17:32:28,946 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:32:28,946 INFO L195 NwaCegarLoop]: trace histogram [98, 98, 98, 98, 98, 98, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:32:28,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-19 17:32:29,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:32:29,147 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:32:29,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:32:29,147 INFO L85 PathProgramCache]: Analyzing trace with hash 1932069167, now seen corresponding path program 6 times [2023-12-19 17:32:29,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:32:29,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943245655] [2023-12-19 17:32:29,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:32:29,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:32:29,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:32:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 29130 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 24279 trivial. 0 not checked. [2023-12-19 17:32:36,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:32:36,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943245655] [2023-12-19 17:32:36,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943245655] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:32:36,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074146244] [2023-12-19 17:32:36,095 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-19 17:32:36,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:32:36,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:32:36,096 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 17:32:36,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-19 17:32:36,348 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2023-12-19 17:32:36,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 17:32:36,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-19 17:32:36,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:32:36,643 INFO L134 CoverageAnalysis]: Checked inductivity of 29130 backedges. 680 proven. 28 refuted. 0 times theorem prover too weak. 28422 trivial. 0 not checked. [2023-12-19 17:32:36,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:32:37,076 INFO L134 CoverageAnalysis]: Checked inductivity of 29130 backedges. 680 proven. 28 refuted. 0 times theorem prover too weak. 28422 trivial. 0 not checked. [2023-12-19 17:32:37,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074146244] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:32:37,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:32:37,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 9, 9] total 115 [2023-12-19 17:32:37,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240042951] [2023-12-19 17:32:37,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:32:37,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2023-12-19 17:32:37,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:32:37,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2023-12-19 17:32:37,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5127, Invalid=7983, Unknown=0, NotChecked=0, Total=13110 [2023-12-19 17:32:37,085 INFO L87 Difference]: Start difference. First operand 1913 states and 2824 transitions. Second operand has 115 states, 115 states have (on average 1.4521739130434783) internal successors, (167), 115 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:42:07,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 17:42:07,951 INFO L93 Difference]: Finished difference Result 19609 states and 29634 transitions. [2023-12-19 17:42:07,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1606 states. [2023-12-19 17:42:07,955 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.4521739130434783) internal successors, (167), 115 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 611 [2023-12-19 17:42:07,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 17:42:08,008 INFO L225 Difference]: With dead ends: 19609 [2023-12-19 17:42:08,008 INFO L226 Difference]: Without dead ends: 17784 [2023-12-19 17:42:08,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3422 GetRequests, 1810 SyntacticMatches, 0 SemanticMatches, 1612 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213250 ImplicationChecksByTransitivity, 222.8s TimeCoverageRelationStatistics Valid=622983, Invalid=1980399, Unknown=0, NotChecked=0, Total=2603382 [2023-12-19 17:42:08,219 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 151146 mSDsluCounter, 1811 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 5691 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151146 SdHoareTripleChecker+Valid, 1834 SdHoareTripleChecker+Invalid, 7093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.3s SdHoareTripleChecker+Time, 5691 IncrementalHoareTripleChecker+Valid, 1402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-12-19 17:42:08,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151146 Valid, 1834 Invalid, 7093 Unknown, 0 Unchecked, 0.3s Time], IncrementalHoareTripleChecker [5691 Valid, 1402 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-12-19 17:42:08,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17784 states. [2023-12-19 17:42:08,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17784 to 2016. [2023-12-19 17:42:08,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2016 states, 2015 states have (on average 1.4838709677419355) internal successors, (2990), 2015 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:42:08,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2016 states to 2016 states and 2990 transitions. [2023-12-19 17:42:08,583 INFO L78 Accepts]: Start accepts. Automaton has 2016 states and 2990 transitions. Word has length 611 [2023-12-19 17:42:08,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 17:42:08,583 INFO L495 AbstractCegarLoop]: Abstraction has 2016 states and 2990 transitions. [2023-12-19 17:42:08,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.4521739130434783) internal successors, (167), 115 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 17:42:08,583 INFO L276 IsEmpty]: Start isEmpty. Operand 2016 states and 2990 transitions. [2023-12-19 17:42:08,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 642 [2023-12-19 17:42:08,591 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 17:42:08,591 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 99, 99, 99, 99, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 17:42:08,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-19 17:42:08,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:42:08,797 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 17:42:08,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 17:42:08,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1757537850, now seen corresponding path program 7 times [2023-12-19 17:42:08,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 17:42:08,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339245965] [2023-12-19 17:42:08,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 17:42:08,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 17:42:08,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:42:16,096 INFO L134 CoverageAnalysis]: Checked inductivity of 30474 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 25524 trivial. 0 not checked. [2023-12-19 17:42:16,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 17:42:16,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339245965] [2023-12-19 17:42:16,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339245965] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 17:42:16,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372154115] [2023-12-19 17:42:16,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-19 17:42:16,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 17:42:16,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 17:42:16,098 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 17:42:16,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-19 17:42:16,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 17:42:16,521 INFO L262 TraceCheckSpWp]: Trace formula consists of 2436 conjuncts, 101 conjunts are in the unsatisfiable core [2023-12-19 17:42:16,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 17:42:16,677 INFO L134 CoverageAnalysis]: Checked inductivity of 30474 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 25524 trivial. 0 not checked. [2023-12-19 17:42:16,678 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 17:42:25,126 INFO L134 CoverageAnalysis]: Checked inductivity of 30474 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 25524 trivial. 0 not checked. [2023-12-19 17:42:25,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372154115] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 17:42:25,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-19 17:42:25,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2023-12-19 17:42:25,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090820532] [2023-12-19 17:42:25,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-19 17:42:25,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2023-12-19 17:42:25,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 17:42:25,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2023-12-19 17:42:25,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2023-12-19 17:42:25,134 INFO L87 Difference]: Start difference. First operand 2016 states and 2990 transitions. Second operand has 203 states, 203 states have (on average 1.0738916256157636) internal successors, (218), 202 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2023-12-19 17:43:53,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2023-12-19 17:43:53,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1381 GetRequests, 1180 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2023-12-19 17:43:53,008 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 16724 mSDsluCounter, 2595 mSDsCounter, 0 mSdLazyCounter, 1516 mSolverCounterSat, 691 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16724 SdHoareTripleChecker+Valid, 2615 SdHoareTripleChecker+Invalid, 2207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 691 IncrementalHoareTripleChecker+Valid, 1516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-19 17:43:53,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16724 Valid, 2615 Invalid, 2207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [691 Valid, 1516 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-19 17:43:53,009 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-19 17:43:53,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-19 17:43:53,027 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-19 17:43:53,027 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-19 17:43:53,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-19 17:43:53,211 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (2016states) and FLOYD_HOARE automaton (currently 202 states, 203 states before enhancement),while ReachableStatesComputation was computing reachable states (10164 states constructed, input type IntersectNwa). [2023-12-19 17:43:53,214 INFO L445 BasicCegarLoop]: Path program histogram: [7, 2, 1] [2023-12-19 17:43:53,215 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-19 17:43:53,216 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.12 05:43:53 BoogieIcfgContainer [2023-12-19 17:43:53,216 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-19 17:43:53,217 INFO L158 Benchmark]: Toolchain (without parser) took 838966.40ms. Allocated memory was 210.8MB in the beginning and 3.2GB in the end (delta: 3.0GB). Free memory was 164.8MB in the beginning and 940.1MB in the end (delta: -775.3MB). Peak memory consumption was 2.5GB. Max. memory is 8.0GB. [2023-12-19 17:43:53,217 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 210.8MB. Free memory is still 166.3MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-19 17:43:53,217 INFO L158 Benchmark]: CACSL2BoogieTranslator took 214.79ms. Allocated memory is still 210.8MB. Free memory was 164.5MB in the beginning and 151.2MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-12-19 17:43:53,217 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.11ms. Allocated memory is still 210.8MB. Free memory was 151.2MB in the beginning and 149.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-19 17:43:53,217 INFO L158 Benchmark]: Boogie Preprocessor took 34.59ms. Allocated memory is still 210.8MB. Free memory was 149.1MB in the beginning and 146.6MB in the end (delta: 2.4MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2023-12-19 17:43:53,218 INFO L158 Benchmark]: RCFGBuilder took 278.38ms. Allocated memory is still 210.8MB. Free memory was 146.6MB in the beginning and 129.2MB in the end (delta: 17.5MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. [2023-12-19 17:43:53,218 INFO L158 Benchmark]: TraceAbstraction took 838402.91ms. Allocated memory was 210.8MB in the beginning and 3.2GB in the end (delta: 3.0GB). Free memory was 128.5MB in the beginning and 940.1MB in the end (delta: -811.6MB). Peak memory consumption was 2.5GB. Max. memory is 8.0GB. [2023-12-19 17:43:53,219 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 210.8MB. Free memory is still 166.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 214.79ms. Allocated memory is still 210.8MB. Free memory was 164.5MB in the beginning and 151.2MB in the end (delta: 13.3MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 29.11ms. Allocated memory is still 210.8MB. Free memory was 151.2MB in the beginning and 149.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 34.59ms. Allocated memory is still 210.8MB. Free memory was 149.1MB in the beginning and 146.6MB in the end (delta: 2.4MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * RCFGBuilder took 278.38ms. Allocated memory is still 210.8MB. Free memory was 146.6MB in the beginning and 129.2MB in the end (delta: 17.5MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. * TraceAbstraction took 838402.91ms. Allocated memory was 210.8MB in the beginning and 3.2GB in the end (delta: 3.0GB). Free memory was 128.5MB in the beginning and 940.1MB in the end (delta: -811.6MB). Peak memory consumption was 2.5GB. 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 - TimeoutResultAtElement [Line: 15]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 15). Cancelled while NwaCegarLoop was constructing difference of abstraction (2016states) and FLOYD_HOARE automaton (currently 202 states, 203 states before enhancement),while ReachableStatesComputation was computing reachable states (10164 states constructed, input type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 838.4s, OverallIterations: 10, TraceHistogramMax: 99, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 672.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 196478 SdHoareTripleChecker+Valid, 7.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 196478 mSDsluCounter, 8564 SdHoareTripleChecker+Invalid, 5.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 8319 mSDsCounter, 7633 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5298 IncrementalHoareTripleChecker+Invalid, 12931 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7633 mSolverCounterUnsat, 245 mSDtfsCounter, 5298 mSolverCounterSat, 0.4s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 6601 GetRequests, 4423 SyntacticMatches, 0 SemanticMatches, 2178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225083 ImplicationChecksByTransitivity, 241.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2016occurred in iteration=9, InterpolantAutomatonStates: 1976, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 9 MinimizatonAttempts, 20623 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 131.3s SatisfiabilityAnalysisTime, 30.7s InterpolantComputationTime, 4010 NumberOfCodeBlocks, 3364 NumberOfCodeBlocksAsserted, 80 NumberOfCheckSat, 5970 ConstructedInterpolants, 0 QuantifiedInterpolants, 8439 SizeOfPredicates, 6 NumberOfNonLiveVariables, 5371 ConjunctsInSsa, 220 ConjunctsInUnsatCore, 26 InterpolantComputations, 2 PerfectInterpolantSequences, 183776/210542 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 could not prove your program: Timeout Completed graceful shutdown