/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 false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/array-fpi/brs1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-20 10:04:07,328 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-20 10:04:07,403 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-20 10:04:07,408 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-20 10:04:07,408 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-20 10:04:07,428 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-20 10:04:07,429 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-20 10:04:07,429 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-20 10:04:07,429 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-20 10:04:07,432 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-20 10:04:07,432 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-20 10:04:07,432 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-20 10:04:07,433 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-20 10:04:07,434 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-20 10:04:07,434 INFO L153 SettingsManager]: * Use SBE=true [2023-12-20 10:04:07,434 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-20 10:04:07,434 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-20 10:04:07,434 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-20 10:04:07,434 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-20 10:04:07,434 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-20 10:04:07,434 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-20 10:04:07,435 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-20 10:04:07,435 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-20 10:04:07,435 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-20 10:04:07,435 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-20 10:04:07,435 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-20 10:04:07,435 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-20 10:04:07,436 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-20 10:04:07,436 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-20 10:04:07,436 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-20 10:04:07,437 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-20 10:04:07,437 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-20 10:04:07,437 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 10:04:07,437 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-20 10:04:07,437 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-20 10:04:07,437 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-20 10:04:07,437 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-20 10:04:07,438 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-20 10:04:07,438 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-20 10:04:07,438 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-20 10:04:07,438 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-20 10:04:07,438 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-20 10:04:07,438 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-20 10:04:07,439 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-20 10:04:07,618 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-20 10:04:07,636 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-20 10:04:07,637 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-20 10:04:07,638 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-20 10:04:07,638 INFO L274 PluginConnector]: CDTParser initialized [2023-12-20 10:04:07,639 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs1.c [2023-12-20 10:04:08,625 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-20 10:04:08,740 INFO L384 CDTParser]: Found 1 translation units. [2023-12-20 10:04:08,741 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/brs1.c [2023-12-20 10:04:08,745 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/530cd36ee/faa5c8d17eed46b1b5c4a87a756b879e/FLAG70007038a [2023-12-20 10:04:08,758 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/530cd36ee/faa5c8d17eed46b1b5c4a87a756b879e [2023-12-20 10:04:08,759 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-20 10:04:08,760 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-20 10:04:08,762 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-20 10:04:08,762 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-20 10:04:08,765 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-20 10:04:08,765 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 10:04:08" (1/1) ... [2023-12-20 10:04:08,766 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@501d209a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:04:08, skipping insertion in model container [2023-12-20 10:04:08,766 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 10:04:08" (1/1) ... [2023-12-20 10:04:08,781 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-20 10:04:08,883 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/brs1.c[587,600] [2023-12-20 10:04:08,893 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 10:04:08,898 INFO L202 MainTranslator]: Completed pre-run [2023-12-20 10:04:08,906 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/brs1.c[587,600] [2023-12-20 10:04:08,920 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 10:04:08,929 INFO L206 MainTranslator]: Completed translation [2023-12-20 10:04:08,930 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:04:08 WrapperNode [2023-12-20 10:04:08,930 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-20 10:04:08,931 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-20 10:04:08,931 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-20 10:04:08,931 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-20 10:04:08,935 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:04:08" (1/1) ... [2023-12-20 10:04:08,943 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:04:08" (1/1) ... [2023-12-20 10:04:08,959 INFO L138 Inliner]: procedures = 17, calls = 27, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 73 [2023-12-20 10:04:08,959 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-20 10:04:08,959 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-20 10:04:08,960 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-20 10:04:08,960 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-20 10:04:08,967 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:04:08" (1/1) ... [2023-12-20 10:04:08,967 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:04:08" (1/1) ... [2023-12-20 10:04:08,976 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:04:08" (1/1) ... [2023-12-20 10:04:08,984 INFO L175 MemorySlicer]: Split 16 memory accesses to 4 slices as follows [2, 7, 3, 4]. 44 percent of accesses are in the largest equivalence class. The 9 initializations are split as follows [2, 7, 0, 0]. The 4 writes are split as follows [0, 0, 2, 2]. [2023-12-20 10:04:08,984 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:04:08" (1/1) ... [2023-12-20 10:04:08,984 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:04:08" (1/1) ... [2023-12-20 10:04:08,992 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:04:08" (1/1) ... [2023-12-20 10:04:09,000 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:04:08" (1/1) ... [2023-12-20 10:04:09,001 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:04:08" (1/1) ... [2023-12-20 10:04:09,001 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:04:08" (1/1) ... [2023-12-20 10:04:09,002 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-20 10:04:09,003 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-20 10:04:09,003 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-20 10:04:09,003 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-20 10:04:09,004 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:04:08" (1/1) ... [2023-12-20 10:04:09,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 10:04:09,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:04:09,043 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) [2023-12-20 10:04:09,063 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 [2023-12-20 10:04:09,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-20 10:04:09,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-20 10:04:09,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-20 10:04:09,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-20 10:04:09,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-12-20 10:04:09,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-20 10:04:09,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-20 10:04:09,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-20 10:04:09,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-20 10:04:09,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-12-20 10:04:09,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-20 10:04:09,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-20 10:04:09,070 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-20 10:04:09,070 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-20 10:04:09,070 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-20 10:04:09,070 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-20 10:04:09,070 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-12-20 10:04:09,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-20 10:04:09,146 INFO L241 CfgBuilder]: Building ICFG [2023-12-20 10:04:09,149 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-20 10:04:09,254 INFO L282 CfgBuilder]: Performing block encoding [2023-12-20 10:04:09,279 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-20 10:04:09,279 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-20 10:04:09,280 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 10:04:09 BoogieIcfgContainer [2023-12-20 10:04:09,280 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-20 10:04:09,281 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-20 10:04:09,281 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-20 10:04:09,283 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-20 10:04:09,283 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.12 10:04:08" (1/3) ... [2023-12-20 10:04:09,284 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cf96c34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 10:04:09, skipping insertion in model container [2023-12-20 10:04:09,284 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 10:04:08" (2/3) ... [2023-12-20 10:04:09,284 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cf96c34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 10:04:09, skipping insertion in model container [2023-12-20 10:04:09,284 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 10:04:09" (3/3) ... [2023-12-20 10:04:09,285 INFO L112 eAbstractionObserver]: Analyzing ICFG brs1.c [2023-12-20 10:04:09,296 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-20 10:04:09,296 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-20 10:04:09,323 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-20 10:04:09,327 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;@79fb52b4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-20 10:04:09,327 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-20 10:04:09,329 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 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) [2023-12-20 10:04:09,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-20 10:04:09,333 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:04:09,333 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:04:09,333 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:04:09,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:04:09,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1256235845, now seen corresponding path program 1 times [2023-12-20 10:04:09,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:04:09,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037009517] [2023-12-20 10:04:09,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:04:09,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:04:09,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:04:09,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:04:09,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:04:09,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037009517] [2023-12-20 10:04:09,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037009517] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 10:04:09,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 10:04:09,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 10:04:09,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528762865] [2023-12-20 10:04:09,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 10:04:09,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-20 10:04:09,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:04:09,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-20 10:04:09,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-20 10:04:09,460 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 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 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2023-12-20 10:04:09,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:04:09,472 INFO L93 Difference]: Finished difference Result 33 states and 47 transitions. [2023-12-20 10:04:09,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-20 10:04:09,474 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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 10 [2023-12-20 10:04:09,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:04:09,478 INFO L225 Difference]: With dead ends: 33 [2023-12-20 10:04:09,478 INFO L226 Difference]: Without dead ends: 15 [2023-12-20 10:04:09,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-20 10:04:09,482 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 10:04:09,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 10:04:09,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-12-20 10:04:09,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-12-20 10:04:09,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 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) [2023-12-20 10:04:09,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2023-12-20 10:04:09,504 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2023-12-20 10:04:09,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:04:09,504 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2023-12-20 10:04:09,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 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) [2023-12-20 10:04:09,505 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2023-12-20 10:04:09,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-20 10:04:09,505 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:04:09,506 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:04:09,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-20 10:04:09,506 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:04:09,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:04:09,507 INFO L85 PathProgramCache]: Analyzing trace with hash -2065910172, now seen corresponding path program 1 times [2023-12-20 10:04:09,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:04:09,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659279347] [2023-12-20 10:04:09,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:04:09,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:04:09,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:04:09,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:04:09,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:04:09,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659279347] [2023-12-20 10:04:09,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659279347] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 10:04:09,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 10:04:09,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-20 10:04:09,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097816409] [2023-12-20 10:04:09,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 10:04:09,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-20 10:04:09,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:04:09,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-20 10:04:09,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-20 10:04:09,704 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2023-12-20 10:04:09,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:04:09,743 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2023-12-20 10:04:09,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-20 10:04:09,744 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 10 [2023-12-20 10:04:09,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:04:09,745 INFO L225 Difference]: With dead ends: 29 [2023-12-20 10:04:09,745 INFO L226 Difference]: Without dead ends: 21 [2023-12-20 10:04:09,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-20 10:04:09,746 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 23 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 10:04:09,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 9 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 10:04:09,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-20 10:04:09,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2023-12-20 10:04:09,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 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) [2023-12-20 10:04:09,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2023-12-20 10:04:09,750 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 10 [2023-12-20 10:04:09,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:04:09,750 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2023-12-20 10:04:09,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2023-12-20 10:04:09,751 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2023-12-20 10:04:09,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-20 10:04:09,751 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:04:09,751 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:04:09,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-20 10:04:09,752 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:04:09,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:04:09,752 INFO L85 PathProgramCache]: Analyzing trace with hash 785079709, now seen corresponding path program 1 times [2023-12-20 10:04:09,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:04:09,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524821884] [2023-12-20 10:04:09,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:04:09,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:04:09,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:04:09,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-20 10:04:09,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:04:09,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524821884] [2023-12-20 10:04:09,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524821884] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 10:04:09,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 10:04:09,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-20 10:04:09,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918167759] [2023-12-20 10:04:09,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 10:04:09,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-20 10:04:09,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:04:09,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-20 10:04:09,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-20 10:04:09,929 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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) [2023-12-20 10:04:09,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:04:09,970 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2023-12-20 10:04:09,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-20 10:04:09,972 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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 16 [2023-12-20 10:04:09,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:04:09,978 INFO L225 Difference]: With dead ends: 25 [2023-12-20 10:04:09,978 INFO L226 Difference]: Without dead ends: 21 [2023-12-20 10:04:09,978 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-20 10:04:09,981 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 10 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 10:04:09,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 24 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 10:04:09,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-20 10:04:09,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2023-12-20 10:04:09,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 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) [2023-12-20 10:04:09,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2023-12-20 10:04:09,985 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 16 [2023-12-20 10:04:09,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:04:09,986 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2023-12-20 10:04:09,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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) [2023-12-20 10:04:09,986 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2023-12-20 10:04:09,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-20 10:04:09,986 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:04:09,986 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:04:09,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-20 10:04:09,987 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:04:09,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:04:09,987 INFO L85 PathProgramCache]: Analyzing trace with hash -485999892, now seen corresponding path program 1 times [2023-12-20 10:04:09,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:04:09,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800793316] [2023-12-20 10:04:09,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:04:09,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:04:10,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:04:10,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:04:10,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:04:10,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800793316] [2023-12-20 10:04:10,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800793316] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:04:10,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346971816] [2023-12-20 10:04:10,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:04:10,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:04:10,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:04:10,112 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) [2023-12-20 10:04:10,115 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-20 10:04:10,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:04:10,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-20 10:04:10,175 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:04:10,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:04:10,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:04:10,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:04:10,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346971816] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:04:10,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:04:10,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-12-20 10:04:10,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684954283] [2023-12-20 10:04:10,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:04:10,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-20 10:04:10,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:04:10,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-20 10:04:10,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-12-20 10:04:10,299 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 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) [2023-12-20 10:04:10,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:04:10,373 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2023-12-20 10:04:10,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-20 10:04:10,373 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 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 19 [2023-12-20 10:04:10,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:04:10,374 INFO L225 Difference]: With dead ends: 41 [2023-12-20 10:04:10,374 INFO L226 Difference]: Without dead ends: 27 [2023-12-20 10:04:10,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-12-20 10:04:10,379 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 10 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 10:04:10,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 30 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 10:04:10,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-12-20 10:04:10,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2023-12-20 10:04:10,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 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) [2023-12-20 10:04:10,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2023-12-20 10:04:10,387 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 19 [2023-12-20 10:04:10,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:04:10,387 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2023-12-20 10:04:10,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 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) [2023-12-20 10:04:10,388 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2023-12-20 10:04:10,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-12-20 10:04:10,388 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:04:10,388 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:04:10,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-20 10:04:10,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:04:10,596 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:04:10,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:04:10,597 INFO L85 PathProgramCache]: Analyzing trace with hash 905152642, now seen corresponding path program 2 times [2023-12-20 10:04:10,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:04:10,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389901709] [2023-12-20 10:04:10,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:04:10,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:04:10,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:04:10,951 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:04:10,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:04:10,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389901709] [2023-12-20 10:04:10,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389901709] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:04:10,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819491237] [2023-12-20 10:04:10,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 10:04:10,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:04:10,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:04:10,952 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) [2023-12-20 10:04:10,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-20 10:04:11,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 10:04:11,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:04:11,015 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-20 10:04:11,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:04:11,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-12-20 10:04:11,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 10:04:11,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-12-20 10:04:11,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-20 10:04:11,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-20 10:04:11,260 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:04:11,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:04:11,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-12-20 10:04:11,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-12-20 10:04:11,377 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:04:11,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819491237] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:04:11,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:04:11,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2023-12-20 10:04:11,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780093247] [2023-12-20 10:04:11,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:04:11,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-20 10:04:11,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:04:11,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-20 10:04:11,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=473, Unknown=0, NotChecked=0, Total=600 [2023-12-20 10:04:11,379 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 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) [2023-12-20 10:04:11,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:04:11,546 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2023-12-20 10:04:11,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 10:04:11,547 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 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 22 [2023-12-20 10:04:11,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:04:11,547 INFO L225 Difference]: With dead ends: 40 [2023-12-20 10:04:11,547 INFO L226 Difference]: Without dead ends: 29 [2023-12-20 10:04:11,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=180, Invalid=690, Unknown=0, NotChecked=0, Total=870 [2023-12-20 10:04:11,548 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 22 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 10:04:11,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 41 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 10:04:11,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-12-20 10:04:11,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2023-12-20 10:04:11,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 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) [2023-12-20 10:04:11,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2023-12-20 10:04:11,551 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 22 [2023-12-20 10:04:11,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:04:11,551 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2023-12-20 10:04:11,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 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) [2023-12-20 10:04:11,551 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2023-12-20 10:04:11,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-20 10:04:11,552 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:04:11,552 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:04:11,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-20 10:04:11,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:04:11,757 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:04:11,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:04:11,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1101010457, now seen corresponding path program 3 times [2023-12-20 10:04:11,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:04:11,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799454506] [2023-12-20 10:04:11,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:04:11,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:04:11,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:04:11,840 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:04:11,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:04:11,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799454506] [2023-12-20 10:04:11,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799454506] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:04:11,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666576084] [2023-12-20 10:04:11,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 10:04:11,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:04:11,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:04:11,842 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) [2023-12-20 10:04:11,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-20 10:04:11,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-20 10:04:11,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:04:11,892 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-20 10:04:11,898 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:04:11,959 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:04:11,959 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:04:12,023 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:04:12,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666576084] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:04:12,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:04:12,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-12-20 10:04:12,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392608812] [2023-12-20 10:04:12,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:04:12,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-20 10:04:12,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:04:12,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-20 10:04:12,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-12-20 10:04:12,024 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 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) [2023-12-20 10:04:12,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:04:12,085 INFO L93 Difference]: Finished difference Result 53 states and 58 transitions. [2023-12-20 10:04:12,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-20 10:04:12,085 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 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 25 [2023-12-20 10:04:12,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:04:12,086 INFO L225 Difference]: With dead ends: 53 [2023-12-20 10:04:12,086 INFO L226 Difference]: Without dead ends: 33 [2023-12-20 10:04:12,086 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-12-20 10:04:12,086 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 26 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 10:04:12,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 23 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 10:04:12,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-12-20 10:04:12,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2023-12-20 10:04:12,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 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) [2023-12-20 10:04:12,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2023-12-20 10:04:12,089 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 25 [2023-12-20 10:04:12,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:04:12,089 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2023-12-20 10:04:12,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 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) [2023-12-20 10:04:12,089 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2023-12-20 10:04:12,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-20 10:04:12,090 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:04:12,090 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:04:12,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-20 10:04:12,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:04:12,295 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:04:12,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:04:12,295 INFO L85 PathProgramCache]: Analyzing trace with hash 868495101, now seen corresponding path program 4 times [2023-12-20 10:04:12,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:04:12,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481683393] [2023-12-20 10:04:12,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:04:12,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:04:12,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:04:12,809 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:04:12,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:04:12,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481683393] [2023-12-20 10:04:12,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481683393] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:04:12,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390641998] [2023-12-20 10:04:12,809 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 10:04:12,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:04:12,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:04:12,810 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) [2023-12-20 10:04:12,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-20 10:04:12,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 10:04:12,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:04:12,852 WARN L260 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 36 conjunts are in the unsatisfiable core [2023-12-20 10:04:12,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:04:12,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2023-12-20 10:04:12,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 16 [2023-12-20 10:04:13,026 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 10:04:13,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-12-20 10:04:13,242 INFO L349 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2023-12-20 10:04:13,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 51 [2023-12-20 10:04:13,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-12-20 10:04:13,352 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-20 10:04:13,370 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-20 10:04:13,370 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:04:13,853 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-20 10:04:13,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390641998] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:04:13,853 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:04:13,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 49 [2023-12-20 10:04:13,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143421902] [2023-12-20 10:04:13,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:04:13,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-12-20 10:04:13,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:04:13,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-12-20 10:04:13,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=2015, Unknown=0, NotChecked=0, Total=2352 [2023-12-20 10:04:13,855 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 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) [2023-12-20 10:04:16,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:04:16,020 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2023-12-20 10:04:16,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-20 10:04:16,020 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 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 28 [2023-12-20 10:04:16,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:04:16,021 INFO L225 Difference]: With dead ends: 52 [2023-12-20 10:04:16,021 INFO L226 Difference]: Without dead ends: 38 [2023-12-20 10:04:16,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1625 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=905, Invalid=4947, Unknown=0, NotChecked=0, Total=5852 [2023-12-20 10:04:16,023 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 139 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 81 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-20 10:04:16,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 66 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 485 Invalid, 1 Unknown, 0 Unchecked, 0.9s Time] [2023-12-20 10:04:16,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-12-20 10:04:16,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2023-12-20 10:04:16,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 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) [2023-12-20 10:04:16,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2023-12-20 10:04:16,028 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 28 [2023-12-20 10:04:16,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:04:16,028 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2023-12-20 10:04:16,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 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) [2023-12-20 10:04:16,028 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2023-12-20 10:04:16,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-20 10:04:16,028 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:04:16,028 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:04:16,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-20 10:04:16,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:04:16,233 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:04:16,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:04:16,234 INFO L85 PathProgramCache]: Analyzing trace with hash 2050846092, now seen corresponding path program 5 times [2023-12-20 10:04:16,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:04:16,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519295224] [2023-12-20 10:04:16,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:04:16,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:04:16,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:04:16,310 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:04:16,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:04:16,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519295224] [2023-12-20 10:04:16,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519295224] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:04:16,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959659682] [2023-12-20 10:04:16,310 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 10:04:16,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:04:16,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:04:16,311 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) [2023-12-20 10:04:16,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-20 10:04:16,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-12-20 10:04:16,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:04:16,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-20 10:04:16,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:04:16,428 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:04:16,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:04:16,502 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:04:16,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959659682] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:04:16,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:04:16,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-12-20 10:04:16,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003296813] [2023-12-20 10:04:16,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:04:16,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-20 10:04:16,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:04:16,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-20 10:04:16,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-12-20 10:04:16,503 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 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) [2023-12-20 10:04:16,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:04:16,581 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2023-12-20 10:04:16,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-20 10:04:16,582 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 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 [2023-12-20 10:04:16,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:04:16,582 INFO L225 Difference]: With dead ends: 65 [2023-12-20 10:04:16,582 INFO L226 Difference]: Without dead ends: 39 [2023-12-20 10:04:16,582 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 49 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2023-12-20 10:04:16,583 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 30 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 10:04:16,583 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 24 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 10:04:16,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-12-20 10:04:16,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2023-12-20 10:04:16,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 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) [2023-12-20 10:04:16,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2023-12-20 10:04:16,587 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 31 [2023-12-20 10:04:16,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:04:16,587 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2023-12-20 10:04:16,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 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) [2023-12-20 10:04:16,587 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2023-12-20 10:04:16,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-20 10:04:16,587 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:04:16,587 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:04:16,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-20 10:04:16,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:04:16,792 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:04:16,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:04:16,793 INFO L85 PathProgramCache]: Analyzing trace with hash -295499230, now seen corresponding path program 6 times [2023-12-20 10:04:16,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:04:16,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632039306] [2023-12-20 10:04:16,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:04:16,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:04:16,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:04:17,592 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:04:17,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:04:17,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632039306] [2023-12-20 10:04:17,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632039306] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:04:17,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859941859] [2023-12-20 10:04:17,593 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 10:04:17,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:04:17,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:04:17,594 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) [2023-12-20 10:04:17,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-20 10:04:17,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-12-20 10:04:17,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:04:17,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 50 conjunts are in the unsatisfiable core [2023-12-20 10:04:17,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:04:17,668 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-20 10:04:17,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-20 10:04:17,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-12-20 10:04:17,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 10:04:17,981 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-12-20 10:04:18,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 21 [2023-12-20 10:04:18,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 27 [2023-12-20 10:04:18,229 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:04:18,229 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 20 [2023-12-20 10:04:18,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-20 10:04:18,283 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:04:18,283 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:04:19,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 93 treesize of output 87 [2023-12-20 10:04:19,069 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:04:19,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 288846 treesize of output 264270 [2023-12-20 10:04:19,189 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:04:19,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859941859] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:04:19,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:04:19,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 21] total 58 [2023-12-20 10:04:19,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209653737] [2023-12-20 10:04:19,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:04:19,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-12-20 10:04:19,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:04:19,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-12-20 10:04:19,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=2812, Unknown=0, NotChecked=0, Total=3306 [2023-12-20 10:04:19,195 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 58 states, 58 states have (on average 1.5172413793103448) internal successors, (88), 58 states have internal predecessors, (88), 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) [2023-12-20 10:04:22,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:04:22,328 INFO L93 Difference]: Finished difference Result 98 states and 116 transitions. [2023-12-20 10:04:22,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-12-20 10:04:22,328 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.5172413793103448) internal successors, (88), 58 states have internal predecessors, (88), 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 34 [2023-12-20 10:04:22,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:04:22,329 INFO L225 Difference]: With dead ends: 98 [2023-12-20 10:04:22,329 INFO L226 Difference]: Without dead ends: 77 [2023-12-20 10:04:22,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3918 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2019, Invalid=10637, Unknown=0, NotChecked=0, Total=12656 [2023-12-20 10:04:22,335 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 321 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 184 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 184 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-20 10:04:22,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 94 Invalid, 998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [184 Valid, 814 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-20 10:04:22,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-12-20 10:04:22,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 67. [2023-12-20 10:04:22,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1363636363636365) internal successors, (75), 66 states have internal predecessors, (75), 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) [2023-12-20 10:04:22,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 75 transitions. [2023-12-20 10:04:22,357 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 75 transitions. Word has length 34 [2023-12-20 10:04:22,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:04:22,358 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 75 transitions. [2023-12-20 10:04:22,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.5172413793103448) internal successors, (88), 58 states have internal predecessors, (88), 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) [2023-12-20 10:04:22,358 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 75 transitions. [2023-12-20 10:04:22,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-12-20 10:04:22,361 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:04:22,361 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:04:22,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-20 10:04:22,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:04:22,584 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:04:22,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:04:22,585 INFO L85 PathProgramCache]: Analyzing trace with hash 98883677, now seen corresponding path program 7 times [2023-12-20 10:04:22,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:04:22,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108132885] [2023-12-20 10:04:22,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:04:22,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:04:22,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:04:23,667 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:04:23,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:04:23,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108132885] [2023-12-20 10:04:23,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108132885] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:04:23,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050329482] [2023-12-20 10:04:23,668 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-20 10:04:23,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:04:23,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:04:23,669 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) [2023-12-20 10:04:23,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-20 10:04:23,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:04:23,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 57 conjunts are in the unsatisfiable core [2023-12-20 10:04:23,728 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:04:23,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-20 10:04:23,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2023-12-20 10:04:23,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2023-12-20 10:04:23,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2023-12-20 10:04:24,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 10:04:24,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-12-20 10:04:24,236 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 21 [2023-12-20 10:04:24,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 27 [2023-12-20 10:04:24,420 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 32 [2023-12-20 10:04:24,435 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:04:24,435 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 24 [2023-12-20 10:04:24,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-20 10:04:24,488 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:04:24,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:04:25,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 157 treesize of output 149 [2023-12-20 10:04:25,448 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:04:25,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 588524930 treesize of output 565456258 [2023-12-20 10:04:25,840 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:04:25,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050329482] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:04:25,840 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:04:25,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23, 23] total 65 [2023-12-20 10:04:25,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343533804] [2023-12-20 10:04:25,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:04:25,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-12-20 10:04:25,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:04:25,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-12-20 10:04:25,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=488, Invalid=3672, Unknown=0, NotChecked=0, Total=4160 [2023-12-20 10:04:25,842 INFO L87 Difference]: Start difference. First operand 67 states and 75 transitions. Second operand has 65 states, 65 states have (on average 1.6307692307692307) internal successors, (106), 65 states have internal predecessors, (106), 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) [2023-12-20 10:04:27,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:04:27,505 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2023-12-20 10:04:27,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-12-20 10:04:27,505 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.6307692307692307) internal successors, (106), 65 states have internal predecessors, (106), 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 40 [2023-12-20 10:04:27,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:04:27,506 INFO L225 Difference]: With dead ends: 101 [2023-12-20 10:04:27,506 INFO L226 Difference]: Without dead ends: 81 [2023-12-20 10:04:27,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2436 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=857, Invalid=6115, Unknown=0, NotChecked=0, Total=6972 [2023-12-20 10:04:27,518 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 150 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 1085 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 10:04:27,519 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 121 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1085 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 10:04:27,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-12-20 10:04:27,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 70. [2023-12-20 10:04:27,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.1159420289855073) internal successors, (77), 69 states have internal predecessors, (77), 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) [2023-12-20 10:04:27,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2023-12-20 10:04:27,527 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 40 [2023-12-20 10:04:27,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:04:27,528 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2023-12-20 10:04:27,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.6307692307692307) internal successors, (106), 65 states have internal predecessors, (106), 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) [2023-12-20 10:04:27,529 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2023-12-20 10:04:27,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-20 10:04:27,529 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:04:27,530 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:04:27,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-20 10:04:27,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:04:27,730 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:04:27,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:04:27,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1092339756, now seen corresponding path program 8 times [2023-12-20 10:04:27,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:04:27,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713088103] [2023-12-20 10:04:27,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:04:27,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:04:27,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:04:27,875 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:04:27,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:04:27,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713088103] [2023-12-20 10:04:27,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713088103] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:04:27,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429113617] [2023-12-20 10:04:27,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 10:04:27,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:04:27,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:04:27,877 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) [2023-12-20 10:04:27,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-20 10:04:27,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 10:04:27,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:04:27,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-20 10:04:27,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:04:28,055 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 51 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:04:28,055 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:04:28,139 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 51 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:04:28,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429113617] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:04:28,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:04:28,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-12-20 10:04:28,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186660816] [2023-12-20 10:04:28,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:04:28,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-20 10:04:28,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:04:28,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-20 10:04:28,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2023-12-20 10:04:28,140 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 states have internal predecessors, (68), 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) [2023-12-20 10:04:28,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:04:28,317 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2023-12-20 10:04:28,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-20 10:04:28,317 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 states have internal predecessors, (68), 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 43 [2023-12-20 10:04:28,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:04:28,318 INFO L225 Difference]: With dead ends: 112 [2023-12-20 10:04:28,318 INFO L226 Difference]: Without dead ends: 51 [2023-12-20 10:04:28,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 67 SyntacticMatches, 11 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=302, Invalid=888, Unknown=0, NotChecked=0, Total=1190 [2023-12-20 10:04:28,319 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 70 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 10:04:28,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 28 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 10:04:28,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-12-20 10:04:28,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 47. [2023-12-20 10:04:28,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 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) [2023-12-20 10:04:28,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2023-12-20 10:04:28,325 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 43 [2023-12-20 10:04:28,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:04:28,325 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2023-12-20 10:04:28,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9565217391304346) internal successors, (68), 23 states have internal predecessors, (68), 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) [2023-12-20 10:04:28,326 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2023-12-20 10:04:28,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-20 10:04:28,326 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:04:28,326 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:04:28,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-20 10:04:28,531 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,SelfDestructingSolverStorable10 [2023-12-20 10:04:28,531 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:04:28,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:04:28,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1048392642, now seen corresponding path program 9 times [2023-12-20 10:04:28,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:04:28,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421969903] [2023-12-20 10:04:28,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:04:28,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:04:28,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:04:29,786 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:04:29,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:04:29,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421969903] [2023-12-20 10:04:29,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421969903] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:04:29,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127596059] [2023-12-20 10:04:29,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 10:04:29,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:04:29,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:04:29,787 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:04:29,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-20 10:04:29,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-12-20 10:04:29,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:04:29,873 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 71 conjunts are in the unsatisfiable core [2023-12-20 10:04:29,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:04:29,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 10:04:29,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:04:29,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-12-20 10:04:29,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:04:29,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:04:29,986 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:04:29,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2023-12-20 10:04:30,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:04:30,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:04:30,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:04:30,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 39 [2023-12-20 10:04:30,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:04:30,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:04:30,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:04:30,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:04:30,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 53 [2023-12-20 10:04:30,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 10:04:30,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-12-20 10:04:30,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 19 [2023-12-20 10:04:30,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 29 [2023-12-20 10:04:30,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 38 [2023-12-20 10:04:31,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:04:31,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:04:31,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:04:31,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:04:31,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:04:31,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:04:31,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:04:31,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:04:31,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:04:31,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:04:31,118 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:04:31,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 22 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 106 treesize of output 172 [2023-12-20 10:04:31,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 17 [2023-12-20 10:04:31,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-20 10:04:31,558 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:04:31,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:04:55,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 51 [2023-12-20 10:04:55,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 174002 treesize of output 172978 [2023-12-20 10:04:55,585 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:04:55,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127596059] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:04:55,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:04:55,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 31, 31] total 81 [2023-12-20 10:04:55,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937425559] [2023-12-20 10:04:55,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:04:55,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2023-12-20 10:04:55,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:04:55,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2023-12-20 10:04:55,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=679, Invalid=5794, Unknown=7, NotChecked=0, Total=6480 [2023-12-20 10:04:55,588 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 81 states, 81 states have (on average 1.5061728395061729) internal successors, (122), 81 states have internal predecessors, (122), 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) [2023-12-20 10:05:04,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:05:04,155 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2023-12-20 10:05:04,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-12-20 10:05:04,155 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.5061728395061729) internal successors, (122), 81 states have internal predecessors, (122), 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 46 [2023-12-20 10:05:04,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:05:04,157 INFO L225 Difference]: With dead ends: 72 [2023-12-20 10:05:04,157 INFO L226 Difference]: Without dead ends: 64 [2023-12-20 10:05:04,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5136 ImplicationChecksByTransitivity, 32.4s TimeCoverageRelationStatistics Valid=2142, Invalid=14361, Unknown=9, NotChecked=0, Total=16512 [2023-12-20 10:05:04,160 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 336 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 1400 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 1400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-20 10:05:04,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 135 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 1400 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-20 10:05:04,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-12-20 10:05:04,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2023-12-20 10:05:04,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 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) [2023-12-20 10:05:04,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2023-12-20 10:05:04,171 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 46 [2023-12-20 10:05:04,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:05:04,171 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2023-12-20 10:05:04,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.5061728395061729) internal successors, (122), 81 states have internal predecessors, (122), 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) [2023-12-20 10:05:04,172 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2023-12-20 10:05:04,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-20 10:05:04,172 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:05:04,172 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:05:04,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-20 10:05:04,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:05:04,377 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:05:04,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:05:04,377 INFO L85 PathProgramCache]: Analyzing trace with hash 284168935, now seen corresponding path program 10 times [2023-12-20 10:05:04,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:05:04,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543258344] [2023-12-20 10:05:04,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:05:04,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:05:04,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:05:04,613 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 148 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:05:04,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:05:04,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543258344] [2023-12-20 10:05:04,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543258344] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:05:04,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863623947] [2023-12-20 10:05:04,613 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-20 10:05:04,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:05:04,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:05:04,614 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:05:04,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-20 10:05:04,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-20 10:05:04,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:05:04,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-20 10:05:04,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:05:04,977 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 146 proven. 51 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-20 10:05:04,978 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:05:05,097 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 146 proven. 51 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-20 10:05:05,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863623947] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:05:05,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:05:05,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17, 17] total 30 [2023-12-20 10:05:05,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975029551] [2023-12-20 10:05:05,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:05:05,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-20 10:05:05,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:05:05,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-20 10:05:05,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=663, Unknown=0, NotChecked=0, Total=870 [2023-12-20 10:05:05,098 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 30 states, 30 states have (on average 3.033333333333333) internal successors, (91), 30 states have internal predecessors, (91), 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) [2023-12-20 10:05:05,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:05:05,246 INFO L93 Difference]: Finished difference Result 106 states and 108 transitions. [2023-12-20 10:05:05,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-20 10:05:05,246 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.033333333333333) internal successors, (91), 30 states have internal predecessors, (91), 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 61 [2023-12-20 10:05:05,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:05:05,246 INFO L225 Difference]: With dead ends: 106 [2023-12-20 10:05:05,246 INFO L226 Difference]: Without dead ends: 67 [2023-12-20 10:05:05,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 100 SyntacticMatches, 13 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=312, Invalid=1020, Unknown=0, NotChecked=0, Total=1332 [2023-12-20 10:05:05,247 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 49 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 10:05:05,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 33 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 10:05:05,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-12-20 10:05:05,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2023-12-20 10:05:05,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 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) [2023-12-20 10:05:05,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2023-12-20 10:05:05,265 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 61 [2023-12-20 10:05:05,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:05:05,265 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2023-12-20 10:05:05,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.033333333333333) internal successors, (91), 30 states have internal predecessors, (91), 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) [2023-12-20 10:05:05,266 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2023-12-20 10:05:05,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-20 10:05:05,266 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:05:05,266 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:05:05,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-20 10:05:05,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-20 10:05:05,467 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:05:05,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:05:05,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1866332931, now seen corresponding path program 11 times [2023-12-20 10:05:05,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:05:05,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040130441] [2023-12-20 10:05:05,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:05:05,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:05:05,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:05:05,721 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 148 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:05:05,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:05:05,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040130441] [2023-12-20 10:05:05,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040130441] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:05:05,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240494128] [2023-12-20 10:05:05,722 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-20 10:05:05,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:05:05,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:05:05,723 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:05:05,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-20 10:05:05,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-12-20 10:05:05,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:05:05,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-20 10:05:05,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:05:06,256 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 176 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:05:06,256 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:05:06,477 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 157 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:05:06,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240494128] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 10:05:06,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-20 10:05:06,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 42 [2023-12-20 10:05:06,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555959679] [2023-12-20 10:05:06,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-20 10:05:06,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-12-20 10:05:06,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 10:05:06,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-12-20 10:05:06,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=1288, Unknown=0, NotChecked=0, Total=1722 [2023-12-20 10:05:06,478 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 42 states, 42 states have (on average 2.9761904761904763) internal successors, (125), 42 states have internal predecessors, (125), 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) [2023-12-20 10:05:07,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 10:05:07,092 INFO L93 Difference]: Finished difference Result 207 states and 212 transitions. [2023-12-20 10:05:07,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-12-20 10:05:07,093 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.9761904761904763) internal successors, (125), 42 states have internal predecessors, (125), 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 64 [2023-12-20 10:05:07,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 10:05:07,094 INFO L225 Difference]: With dead ends: 207 [2023-12-20 10:05:07,094 INFO L226 Difference]: Without dead ends: 81 [2023-12-20 10:05:07,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 97 SyntacticMatches, 11 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2262 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1249, Invalid=5071, Unknown=0, NotChecked=0, Total=6320 [2023-12-20 10:05:07,095 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 229 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 10:05:07,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 55 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 10:05:07,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-12-20 10:05:07,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2023-12-20 10:05:07,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 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) [2023-12-20 10:05:07,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2023-12-20 10:05:07,113 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 64 [2023-12-20 10:05:07,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 10:05:07,114 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2023-12-20 10:05:07,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.9761904761904763) internal successors, (125), 42 states have internal predecessors, (125), 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) [2023-12-20 10:05:07,114 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2023-12-20 10:05:07,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-12-20 10:05:07,115 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 10:05:07,115 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 10:05:07,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-20 10:05:07,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-20 10:05:07,321 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 10:05:07,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 10:05:07,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1065229187, now seen corresponding path program 12 times [2023-12-20 10:05:07,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 10:05:07,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765957716] [2023-12-20 10:05:07,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 10:05:07,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 10:05:07,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 10:05:12,131 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 21 proven. 331 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:05:12,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 10:05:12,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765957716] [2023-12-20 10:05:12,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765957716] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 10:05:12,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466420318] [2023-12-20 10:05:12,132 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-20 10:05:12,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 10:05:12,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 10:05:12,133 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 10:05:12,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-20 10:05:12,381 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2023-12-20 10:05:12,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 10:05:12,384 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 122 conjunts are in the unsatisfiable core [2023-12-20 10:05:12,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 10:05:12,414 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-20 10:05:12,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-20 10:05:12,591 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:05:12,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2023-12-20 10:05:12,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2023-12-20 10:05:12,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 41 [2023-12-20 10:05:12,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 51 [2023-12-20 10:05:13,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 61 [2023-12-20 10:05:13,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 71 [2023-12-20 10:05:13,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 81 [2023-12-20 10:05:13,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 45 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 91 [2023-12-20 10:05:14,145 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-20 10:05:14,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-12-20 10:05:14,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 23 [2023-12-20 10:05:14,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 33 [2023-12-20 10:05:15,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 42 [2023-12-20 10:05:15,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 51 [2023-12-20 10:05:15,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 60 [2023-12-20 10:05:15,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 69 [2023-12-20 10:05:16,234 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 78 [2023-12-20 10:05:16,570 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 87 [2023-12-20 10:05:17,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 96 [2023-12-20 10:05:17,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:05:17,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:05:17,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:05:17,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:05:17,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:05:17,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:05:17,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:05:17,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:05:17,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:05:17,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:05:17,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:05:17,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:05:17,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:05:17,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:05:17,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:05:17,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:05:17,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:05:17,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:05:17,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:05:17,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:05:17,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:05:17,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:05:17,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:05:17,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:05:17,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:05:17,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:05:17,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:05:17,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:05:17,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:05:17,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:05:17,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:05:17,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:05:17,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:05:17,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:05:17,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:05:17,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-20 10:05:17,577 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 10:05:17,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 19 select indices, 19 select index equivalence classes, 117 disjoint index pairs (out of 171 index pairs), introduced 19 new quantified variables, introduced 171 case distinctions, treesize of input 162 treesize of output 480 [2023-12-20 10:05:23,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-12-20 10:05:23,521 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 10:05:23,521 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 10:05:49,421 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_687 Int) (v_ArrVal_684 Int) (v_ArrVal_682 Int) (v_ArrVal_689 Int)) (or (< 1 v_ArrVal_684) (< 1 v_ArrVal_687) (< 1 v_ArrVal_682) (< (let ((.cse0 (select |c_#memory_int#2| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse1 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (+ (select (store (store (store (store .cse0 (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_682) (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset| 4) v_ArrVal_684) (+ .cse1 8 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_687) (+ .cse1 12 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_689) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) v_ArrVal_689 v_ArrVal_687 v_ArrVal_684 v_ArrVal_682 (select .cse0 (+ (- 20) .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|)) (select .cse0 (+ .cse1 (- 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) (select .cse0 (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset| (- 8))) (select .cse0 (+ (- 16) .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|)) (select .cse0 (+ .cse1 (- 12) |c_ULTIMATE.start_main_~a~0#1.offset|)))) (+ 5 |c_ULTIMATE.start_main_~i~0#1|)) (< 1 v_ArrVal_689))) is different from false [2023-12-20 10:06:02,847 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_687 Int) (v_ArrVal_684 Int) (v_ArrVal_682 Int) (v_ArrVal_681 Int) (v_ArrVal_689 Int)) (or (< (let ((.cse0 (select |c_#memory_int#2| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse1 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (+ v_ArrVal_689 v_ArrVal_687 v_ArrVal_684 v_ArrVal_682 v_ArrVal_681 (select .cse0 (+ .cse1 (- 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) (select .cse0 (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset| (- 8))) (select .cse0 (+ (- 16) .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|)) (select (store (store (store (store (store .cse0 (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_681) (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset| 4) v_ArrVal_682) (+ .cse1 8 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_684) (+ .cse1 12 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_687) (+ .cse1 16 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_689) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (select .cse0 (+ .cse1 (- 12) |c_ULTIMATE.start_main_~a~0#1.offset|)))) (+ 6 |c_ULTIMATE.start_main_~i~0#1|)) (< 1 v_ArrVal_684) (< 1 v_ArrVal_687) (< 1 v_ArrVal_681) (< 1 v_ArrVal_682) (< 1 v_ArrVal_689))) is different from false [2023-12-20 10:06:24,884 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_687 Int) (v_ArrVal_684 Int) (v_ArrVal_682 Int) (v_ArrVal_681 Int) (v_ArrVal_679 Int) (v_ArrVal_689 Int)) (or (< 1 v_ArrVal_679) (< 1 v_ArrVal_684) (< (let ((.cse0 (select |c_#memory_int#2| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse1 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (+ v_ArrVal_689 v_ArrVal_679 v_ArrVal_687 v_ArrVal_684 v_ArrVal_682 v_ArrVal_681 (select (store (store (store (store (store (store .cse0 (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_679) (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset| 4) v_ArrVal_681) (+ .cse1 8 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_682) (+ .cse1 12 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_684) (+ .cse1 16 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_687) (+ .cse1 20 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_689) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) (select .cse0 (+ .cse1 (- 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) (select .cse0 (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset| (- 8))) (select .cse0 (+ .cse1 (- 12) |c_ULTIMATE.start_main_~a~0#1.offset|)))) (+ 7 |c_ULTIMATE.start_main_~i~0#1|)) (< 1 v_ArrVal_687) (< 1 v_ArrVal_681) (< 1 v_ArrVal_682) (< 1 v_ArrVal_689))) is different from false [2023-12-20 10:07:02,627 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_687 Int) (v_ArrVal_684 Int) (v_ArrVal_682 Int) (v_ArrVal_681 Int) (v_ArrVal_679 Int) (v_ArrVal_689 Int) (v_ArrVal_677 Int)) (or (< 1 v_ArrVal_679) (< 1 v_ArrVal_684) (< 1 v_ArrVal_687) (< 1 v_ArrVal_681) (< 1 v_ArrVal_682) (< 1 v_ArrVal_677) (< (let ((.cse0 (select |c_#memory_int#2| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse1 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (+ v_ArrVal_689 v_ArrVal_679 v_ArrVal_677 v_ArrVal_687 v_ArrVal_684 v_ArrVal_682 v_ArrVal_681 (select .cse0 (+ .cse1 (- 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) (select .cse0 (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset| (- 8))) (select (store (store (store (store (store (store (store .cse0 (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_677) (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset| 4) v_ArrVal_679) (+ .cse1 8 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_681) (+ .cse1 12 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_682) (+ .cse1 16 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_684) (+ .cse1 20 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_687) (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset| 24) v_ArrVal_689) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)))) (+ 8 |c_ULTIMATE.start_main_~i~0#1|)) (< 1 v_ArrVal_689))) is different from false [2023-12-20 10:07:06,986 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_687 Int) (v_ArrVal_684 Int) (v_ArrVal_682 Int) (v_ArrVal_681 Int) (v_ArrVal_679 Int) (v_ArrVal_689 Int) (v_ArrVal_677 Int)) (or (< 1 v_ArrVal_679) (< 1 v_ArrVal_684) (< 1 v_ArrVal_687) (< 1 v_ArrVal_681) (< 1 v_ArrVal_682) (< 1 v_ArrVal_677) (< (let ((.cse0 (select |c_#memory_int#2| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse1 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (+ v_ArrVal_689 v_ArrVal_679 v_ArrVal_677 v_ArrVal_687 v_ArrVal_684 v_ArrVal_682 v_ArrVal_681 (select .cse0 (+ .cse1 (- 4) |c_ULTIMATE.start_main_~a~0#1.offset|)) (select .cse0 (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|)) (select (store (store (store (store (store (store (store .cse0 (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset| 4) v_ArrVal_677) (+ .cse1 8 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_679) (+ .cse1 12 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_681) (+ .cse1 16 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_682) (+ .cse1 20 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_684) (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset| 24) v_ArrVal_687) (+ .cse1 28 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_689) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)))) (+ 9 |c_ULTIMATE.start_main_~i~0#1|)) (< 1 v_ArrVal_689))) is different from false [2023-12-20 10:07:11,165 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_687 Int) (v_ArrVal_684 Int) (v_ArrVal_682 Int) (v_ArrVal_681 Int) (v_ArrVal_679 Int) (v_ArrVal_689 Int) (v_ArrVal_677 Int)) (or (< (let ((.cse0 (select |c_#memory_int#2| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse1 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (+ (select (store (store (store (store (store (store (store (store .cse0 (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) 1) (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset| 4) v_ArrVal_677) (+ .cse1 8 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_679) (+ .cse1 12 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_681) (+ .cse1 16 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_682) (+ .cse1 20 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_684) (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset| 24) v_ArrVal_687) (+ .cse1 28 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_689) (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4)) v_ArrVal_689 v_ArrVal_679 v_ArrVal_677 v_ArrVal_687 v_ArrVal_684 v_ArrVal_682 v_ArrVal_681 (select .cse0 (+ .cse1 (- 4) |c_ULTIMATE.start_main_~a~0#1.offset|)))) (+ 8 |c_ULTIMATE.start_main_~i~0#1|)) (< 1 v_ArrVal_679) (< 1 v_ArrVal_684) (< 1 v_ArrVal_687) (< 1 v_ArrVal_681) (< 1 v_ArrVal_682) (< 1 v_ArrVal_677) (< 1 v_ArrVal_689))) is different from false [2023-12-20 10:07:28,194 WARN L249 Executor]: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2023-12-20 10:07:28,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 101 [2023-12-20 10:07:28,197 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2023-12-20 10:07:28,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-20 10:07:28,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-20 10:07:28,398 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:281) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.checkSat(ManagedScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker.checkImplication(MonolithicImplicationChecker.java:85) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.compare(PredicateUnifier.java:915) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier$PredicateComparison.(PredicateUnifier.java:789) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:377) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate(PredicateUnifier.java:326) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp$UnifyPostprocessor.postprocess(TraceCheckSpWp.java:579) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:341) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:184) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:110) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 46 more [2023-12-20 10:07:28,402 INFO L158 Benchmark]: Toolchain (without parser) took 199641.70ms. Allocated memory was 209.7MB in the beginning and 798.0MB in the end (delta: 588.3MB). Free memory was 169.4MB in the beginning and 415.7MB in the end (delta: -246.3MB). Peak memory consumption was 342.9MB. Max. memory is 8.0GB. [2023-12-20 10:07:28,402 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 209.7MB. Free memory is still 161.6MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-20 10:07:28,402 INFO L158 Benchmark]: CACSL2BoogieTranslator took 168.09ms. Allocated memory is still 209.7MB. Free memory was 169.0MB in the beginning and 157.9MB in the end (delta: 11.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-20 10:07:28,402 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.52ms. Allocated memory is still 209.7MB. Free memory was 157.9MB in the beginning and 156.4MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-20 10:07:28,402 INFO L158 Benchmark]: Boogie Preprocessor took 43.03ms. Allocated memory is still 209.7MB. Free memory was 156.2MB in the beginning and 154.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-20 10:07:28,403 INFO L158 Benchmark]: RCFGBuilder took 276.77ms. Allocated memory is still 209.7MB. Free memory was 154.1MB in the beginning and 141.8MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-12-20 10:07:28,403 INFO L158 Benchmark]: TraceAbstraction took 199120.42ms. Allocated memory was 209.7MB in the beginning and 798.0MB in the end (delta: 588.3MB). Free memory was 141.1MB in the beginning and 415.7MB in the end (delta: -274.6MB). Peak memory consumption was 314.6MB. Max. memory is 8.0GB. [2023-12-20 10:07:28,403 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 209.7MB. Free memory is still 161.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 168.09ms. Allocated memory is still 209.7MB. Free memory was 169.0MB in the beginning and 157.9MB in the end (delta: 11.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 28.52ms. Allocated memory is still 209.7MB. Free memory was 157.9MB in the beginning and 156.4MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 43.03ms. Allocated memory is still 209.7MB. Free memory was 156.2MB in the beginning and 154.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 276.77ms. Allocated memory is still 209.7MB. Free memory was 154.1MB in the beginning and 141.8MB in the end (delta: 12.3MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 199120.42ms. Allocated memory was 209.7MB in the beginning and 798.0MB in the end (delta: 588.3MB). Free memory was 141.1MB in the beginning and 415.7MB in the end (delta: -274.6MB). Peak memory consumption was 314.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...