/usr/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 -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/array-tiling/tcpy.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 19:01:03,004 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 19:01:03,006 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 19:01:03,023 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 19:01:03,023 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 19:01:03,024 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 19:01:03,025 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 19:01:03,026 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 19:01:03,027 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 19:01:03,028 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 19:01:03,029 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 19:01:03,029 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 19:01:03,030 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 19:01:03,030 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 19:01:03,031 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 19:01:03,031 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 19:01:03,032 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 19:01:03,033 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 19:01:03,034 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 19:01:03,035 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 19:01:03,035 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 19:01:03,036 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 19:01:03,037 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 19:01:03,037 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 19:01:03,040 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 19:01:03,045 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 19:01:03,045 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 19:01:03,046 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 19:01:03,046 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 19:01:03,060 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 19:01:03,060 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 19:01:03,060 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 19:01:03,060 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 19:01:03,061 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 19:01:03,061 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 19:01:03,061 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 19:01:03,061 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 19:01:03,061 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 19:01:03,062 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 19:01:03,062 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 19:01:03,062 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 19:01:03,062 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 19:01:03,062 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 19:01:03,062 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 19:01:03,062 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 19:01:03,062 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 19:01:03,063 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 19:01:03,063 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 19:01:03,063 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 19:01:03,063 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 19:01:03,063 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 19:01:03,063 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 19:01:03,063 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 19:01:03,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 19:01:03,064 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 19:01:03,064 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 19:01:03,064 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 19:01:03,064 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 19:01:03,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 19:01:03,064 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 19:01:03,064 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 19:01:03,064 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 19:01:03,065 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 19:01:03,065 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 19:01:03,065 INFO L138 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 19:01:03,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 19:01:03,254 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 19:01:03,256 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 19:01:03,257 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 19:01:03,257 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 19:01:03,258 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/tcpy.c [2023-04-01 19:01:04,272 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 19:01:04,385 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 19:01:04,386 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/tcpy.c [2023-04-01 19:01:04,390 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55cd61eae/c065ffa913cd439b81c27a770eefbd17/FLAG046a46566 [2023-04-01 19:01:04,399 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55cd61eae/c065ffa913cd439b81c27a770eefbd17 [2023-04-01 19:01:04,401 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 19:01:04,402 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 19:01:04,403 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 19:01:04,403 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 19:01:04,405 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 19:01:04,405 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 07:01:04" (1/1) ... [2023-04-01 19:01:04,406 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ae7e970 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:01:04, skipping insertion in model container [2023-04-01 19:01:04,406 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 07:01:04" (1/1) ... [2023-04-01 19:01:04,411 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 19:01:04,419 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 19:01:04,520 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/tcpy.c[395,408] [2023-04-01 19:01:04,531 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 19:01:04,538 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 19:01:04,546 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/tcpy.c[395,408] [2023-04-01 19:01:04,556 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 19:01:04,567 INFO L208 MainTranslator]: Completed translation [2023-04-01 19:01:04,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:01:04 WrapperNode [2023-04-01 19:01:04,568 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 19:01:04,569 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 19:01:04,569 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 19:01:04,569 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 19:01:04,577 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:01:04" (1/1) ... [2023-04-01 19:01:04,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:01:04" (1/1) ... [2023-04-01 19:01:04,593 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:01:04" (1/1) ... [2023-04-01 19:01:04,593 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:01:04" (1/1) ... [2023-04-01 19:01:04,598 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:01:04" (1/1) ... [2023-04-01 19:01:04,601 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:01:04" (1/1) ... [2023-04-01 19:01:04,617 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:01:04" (1/1) ... [2023-04-01 19:01:04,618 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:01:04" (1/1) ... [2023-04-01 19:01:04,619 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 19:01:04,620 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 19:01:04,620 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 19:01:04,620 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 19:01:04,621 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:01:04" (1/1) ... [2023-04-01 19:01:04,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 19:01:04,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:01:04,658 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 19:01:04,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 19:01:04,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 19:01:04,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 19:01:04,691 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 19:01:04,691 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 19:01:04,691 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 19:01:04,691 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 19:01:04,692 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 19:01:04,692 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 19:01:04,692 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 19:01:04,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 19:01:04,692 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 19:01:04,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 19:01:04,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 19:01:04,693 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 19:01:04,693 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 19:01:04,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 19:01:04,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 19:01:04,693 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 19:01:04,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 19:01:04,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 19:01:04,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 19:01:04,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 19:01:04,742 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 19:01:04,744 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 19:01:04,875 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 19:01:04,879 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 19:01:04,879 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 19:01:04,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 07:01:04 BoogieIcfgContainer [2023-04-01 19:01:04,880 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 19:01:04,881 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 19:01:04,882 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 19:01:04,884 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 19:01:04,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 07:01:04" (1/3) ... [2023-04-01 19:01:04,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b64523c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 07:01:04, skipping insertion in model container [2023-04-01 19:01:04,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:01:04" (2/3) ... [2023-04-01 19:01:04,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b64523c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 07:01:04, skipping insertion in model container [2023-04-01 19:01:04,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 07:01:04" (3/3) ... [2023-04-01 19:01:04,886 INFO L112 eAbstractionObserver]: Analyzing ICFG tcpy.c [2023-04-01 19:01:04,897 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 19:01:04,897 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 19:01:04,925 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 19:01:04,930 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=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4b0b9ee7, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 19:01:04,930 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 19:01:04,935 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 25 states have internal predecessors, (35), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:01:04,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-01 19:01:04,941 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:01:04,941 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:01:04,942 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:01:04,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:01:04,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1301623166, now seen corresponding path program 1 times [2023-04-01 19:01:04,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:01:04,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451178116] [2023-04-01 19:01:04,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:01:04,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:01:05,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:01:05,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:01:05,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:01:05,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-04-01 19:01:05,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:01:05,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:01:05,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:01:05,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451178116] [2023-04-01 19:01:05,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451178116] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:01:05,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 19:01:05,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 19:01:05,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736565309] [2023-04-01 19:01:05,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:01:05,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 19:01:05,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:01:05,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 19:01:05,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 19:01:05,396 INFO L87 Difference]: Start difference. First operand has 34 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 25 states have internal predecessors, (35), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 19:01:05,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:01:05,469 INFO L93 Difference]: Finished difference Result 61 states and 80 transitions. [2023-04-01 19:01:05,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 19:01:05,471 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2023-04-01 19:01:05,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:01:05,475 INFO L225 Difference]: With dead ends: 61 [2023-04-01 19:01:05,475 INFO L226 Difference]: Without dead ends: 31 [2023-04-01 19:01:05,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 19:01:05,479 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 9 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:01:05,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 42 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:01:05,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-01 19:01:05,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2023-04-01 19:01:05,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 19:01:05,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2023-04-01 19:01:05,512 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 22 [2023-04-01 19:01:05,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:01:05,513 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2023-04-01 19:01:05,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 19:01:05,513 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2023-04-01 19:01:05,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 19:01:05,515 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:01:05,515 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:01:05,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 19:01:05,515 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:01:05,517 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:01:05,517 INFO L85 PathProgramCache]: Analyzing trace with hash 260841182, now seen corresponding path program 1 times [2023-04-01 19:01:05,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:01:05,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75206056] [2023-04-01 19:01:05,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:01:05,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:01:05,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:01:05,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:01:05,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:01:05,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-04-01 19:01:05,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:01:05,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:01:05,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:01:05,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75206056] [2023-04-01 19:01:05,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75206056] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:01:05,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74565776] [2023-04-01 19:01:05,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:01:05,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:01:05,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:01:05,656 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) [2023-04-01 19:01:05,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 19:01:05,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:01:05,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 19:01:05,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:01:05,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:01:05,826 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:01:05,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:01:05,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74565776] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:01:05,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:01:05,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-04-01 19:01:05,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393337030] [2023-04-01 19:01:05,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:01:05,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 19:01:05,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:01:05,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 19:01:05,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-04-01 19:01:05,880 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 19:01:05,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:01:05,949 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2023-04-01 19:01:05,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 19:01:05,949 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2023-04-01 19:01:05,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:01:05,950 INFO L225 Difference]: With dead ends: 53 [2023-04-01 19:01:05,950 INFO L226 Difference]: Without dead ends: 33 [2023-04-01 19:01:05,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-04-01 19:01:05,952 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 11 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 19:01:05,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 27 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 19:01:05,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-01 19:01:05,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2023-04-01 19:01:05,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 19:01:05,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2023-04-01 19:01:05,963 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 24 [2023-04-01 19:01:05,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:01:05,963 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2023-04-01 19:01:05,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-01 19:01:05,963 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2023-04-01 19:01:05,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 19:01:05,964 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:01:05,964 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:01:05,972 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 19:01:06,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:01:06,169 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:01:06,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:01:06,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1383540540, now seen corresponding path program 2 times [2023-04-01 19:01:06,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:01:06,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468726626] [2023-04-01 19:01:06,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:01:06,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:01:06,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:01:06,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:01:06,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:01:06,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 19:01:06,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:01:06,389 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 19:01:06,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:01:06,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468726626] [2023-04-01 19:01:06,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468726626] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:01:06,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 19:01:06,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-04-01 19:01:06,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162752518] [2023-04-01 19:01:06,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:01:06,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 19:01:06,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:01:06,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 19:01:06,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-04-01 19:01:06,392 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 19:01:06,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:01:06,471 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2023-04-01 19:01:06,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 19:01:06,471 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2023-04-01 19:01:06,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:01:06,474 INFO L225 Difference]: With dead ends: 49 [2023-04-01 19:01:06,474 INFO L226 Difference]: Without dead ends: 38 [2023-04-01 19:01:06,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-04-01 19:01:06,477 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 53 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:01:06,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 20 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:01:06,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-04-01 19:01:06,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2023-04-01 19:01:06,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 19:01:06,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2023-04-01 19:01:06,501 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 26 [2023-04-01 19:01:06,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:01:06,502 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2023-04-01 19:01:06,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 19:01:06,502 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2023-04-01 19:01:06,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 19:01:06,503 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:01:06,503 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:01:06,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 19:01:06,504 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:01:06,504 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:01:06,504 INFO L85 PathProgramCache]: Analyzing trace with hash -2006672966, now seen corresponding path program 1 times [2023-04-01 19:01:06,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:01:06,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408262638] [2023-04-01 19:01:06,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:01:06,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:01:06,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:01:06,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:01:06,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:01:06,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 19:01:06,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:01:06,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 19:01:06,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:01:06,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408262638] [2023-04-01 19:01:06,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408262638] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:01:06,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533376191] [2023-04-01 19:01:06,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:01:06,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:01:06,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:01:06,994 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) [2023-04-01 19:01:07,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 19:01:07,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:01:07,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 35 conjunts are in the unsatisfiable core [2023-04-01 19:01:07,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:01:07,099 INFO L350 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 10 treesize of output 8 [2023-04-01 19:01:07,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:01:07,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:01:07,297 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 29 [2023-04-01 19:01:07,339 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2023-04-01 19:01:07,369 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 19:01:07,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:01:07,435 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 19:01:07,435 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1038 treesize of output 982 [2023-04-01 19:01:07,454 INFO L350 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 208 treesize of output 172 [2023-04-01 19:01:07,695 INFO L350 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 343 treesize of output 331 [2023-04-01 19:01:07,704 INFO L350 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 154 treesize of output 150 [2023-04-01 19:01:07,708 INFO L350 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 [2023-04-01 19:01:07,728 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2023-04-01 19:01:07,729 INFO L350 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 152 treesize of output 126 [2023-04-01 19:01:07,762 INFO L321 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2023-04-01 19:01:07,762 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 173 treesize of output 165 [2023-04-01 19:01:07,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:01:07,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:01:07,781 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 1 [2023-04-01 19:01:07,792 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-01 19:01:07,792 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 319 treesize of output 1 [2023-04-01 19:01:07,804 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 19:01:07,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 214 treesize of output 193 [2023-04-01 19:01:07,830 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 19:01:07,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 113 [2023-04-01 19:01:07,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 106 treesize of output 102 [2023-04-01 19:01:07,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:01:07,878 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 19:01:07,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:01:07,881 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 1 [2023-04-01 19:01:07,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:01:07,900 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2023-04-01 19:01:07,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 1 [2023-04-01 19:01:07,906 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 19:01:07,909 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2023-04-01 19:01:07,909 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 1 [2023-04-01 19:01:07,921 INFO L321 Elim1Store]: treesize reduction 28, result has 3.4 percent of original size [2023-04-01 19:01:07,922 INFO L350 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 257 treesize of output 1 [2023-04-01 19:01:08,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 19:01:08,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533376191] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:01:08,073 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:01:08,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 12] total 25 [2023-04-01 19:01:08,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986903809] [2023-04-01 19:01:08,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:01:08,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 19:01:08,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:01:08,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 19:01:08,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2023-04-01 19:01:08,075 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 25 states, 24 states have (on average 2.0) internal successors, (48), 20 states have internal predecessors, (48), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:01:08,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:01:08,377 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2023-04-01 19:01:08,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-01 19:01:08,377 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 20 states have internal predecessors, (48), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 28 [2023-04-01 19:01:08,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:01:08,387 INFO L225 Difference]: With dead ends: 44 [2023-04-01 19:01:08,387 INFO L226 Difference]: Without dead ends: 42 [2023-04-01 19:01:08,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=230, Invalid=1030, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 19:01:08,389 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:01:08,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 99 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:01:08,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-04-01 19:01:08,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2023-04-01 19:01:08,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:01:08,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2023-04-01 19:01:08,402 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 28 [2023-04-01 19:01:08,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:01:08,402 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2023-04-01 19:01:08,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0) internal successors, (48), 20 states have internal predecessors, (48), 5 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:01:08,403 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2023-04-01 19:01:08,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-01 19:01:08,405 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:01:08,405 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:01:08,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 19:01:08,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-01 19:01:08,611 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:01:08,612 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:01:08,612 INFO L85 PathProgramCache]: Analyzing trace with hash 223702509, now seen corresponding path program 1 times [2023-04-01 19:01:08,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:01:08,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425614645] [2023-04-01 19:01:08,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:01:08,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:01:08,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:01:09,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:01:09,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:01:09,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-04-01 19:01:09,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:01:09,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-04-01 19:01:09,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:01:09,177 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:01:09,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:01:09,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425614645] [2023-04-01 19:01:09,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425614645] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:01:09,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327816339] [2023-04-01 19:01:09,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:01:09,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:01:09,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:01:09,178 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) [2023-04-01 19:01:09,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 19:01:09,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:01:09,231 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 45 conjunts are in the unsatisfiable core [2023-04-01 19:01:09,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:01:09,240 INFO L350 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 10 treesize of output 8 [2023-04-01 19:01:09,278 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 19:01:09,403 INFO L321 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2023-04-01 19:01:09,403 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2023-04-01 19:01:11,513 WARN L861 $PredicateComparison]: unable to prove that (exists ((v_main_~acopy~0.offset_BEFORE_CALL_3 Int) (v_main_~acopy~0.base_BEFORE_CALL_4 Int) (~SIZE~0 Int) (v_main_~a~0.base_BEFORE_CALL_4 Int)) (and (<= ~SIZE~0 2) (not (= v_main_~a~0.base_BEFORE_CALL_4 v_main_~acopy~0.base_BEFORE_CALL_4)) (let ((.cse0 (* ~SIZE~0 4))) (= (select (select |c_#memory_int| v_main_~acopy~0.base_BEFORE_CALL_4) (+ .cse0 v_main_~acopy~0.offset_BEFORE_CALL_3 (- 4))) (select (select |c_#memory_int| v_main_~a~0.base_BEFORE_CALL_4) (+ .cse0 (- 4))))) (< 1 ~SIZE~0))) is different from true [2023-04-01 19:01:11,679 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 19:01:11,682 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 19:01:11,682 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 13 [2023-04-01 19:01:11,724 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-04-01 19:01:11,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:01:13,826 WARN L839 $PredicateComparison]: unable to prove that (forall ((main_~acopy~0.offset Int) (v_ArrVal_97 Int)) (let ((.cse0 (store (let ((.cse1 (* c_main_~i~0 (- 4))) (.cse2 (* 4 c_~SIZE~0))) (store (select |c_#memory_int| c_main_~acopy~0.base) (+ .cse1 (- 4) .cse2 main_~acopy~0.offset) (select (select |c_#memory_int| c_main_~a~0.base) (+ .cse1 c_main_~a~0.offset (- 4) .cse2)))) (+ (* c_main_~i~0 4) main_~acopy~0.offset) v_ArrVal_97))) (= (select (select (store |c_#memory_int| c_main_~acopy~0.base .cse0) c_main_~a~0.base) (+ c_main_~a~0.offset 4)) (select .cse0 (+ main_~acopy~0.offset 4))))) is different from false [2023-04-01 19:01:15,837 WARN L839 $PredicateComparison]: unable to prove that (forall ((main_~acopy~0.offset Int) (v_ArrVal_97 Int)) (let ((.cse0 (let ((.cse1 (* 4 c_~SIZE~0))) (store (select |c_#memory_int| c_main_~acopy~0.base) (+ (- 4) .cse1 main_~acopy~0.offset) (select (select |c_#memory_int| c_main_~a~0.base) (+ c_main_~a~0.offset (- 4) .cse1)))))) (= (select .cse0 (+ main_~acopy~0.offset 4)) (select (select (store |c_#memory_int| c_main_~acopy~0.base (store .cse0 main_~acopy~0.offset v_ArrVal_97)) c_main_~a~0.base) (+ c_main_~a~0.offset 4))))) is different from false [2023-04-01 19:01:17,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327816339] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:01:17,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 19:01:17,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 28 [2023-04-01 19:01:17,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053194240] [2023-04-01 19:01:17,913 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 19:01:17,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-04-01 19:01:17,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:01:17,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-04-01 19:01:17,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=796, Unknown=3, NotChecked=180, Total=1122 [2023-04-01 19:01:17,914 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 28 states, 27 states have (on average 1.962962962962963) internal successors, (53), 24 states have internal predecessors, (53), 6 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 19:01:38,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:01:38,611 INFO L93 Difference]: Finished difference Result 99 states and 105 transitions. [2023-04-01 19:01:38,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-04-01 19:01:38,611 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.962962962962963) internal successors, (53), 24 states have internal predecessors, (53), 6 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 36 [2023-04-01 19:01:38,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:01:38,613 INFO L225 Difference]: With dead ends: 99 [2023-04-01 19:01:38,613 INFO L226 Difference]: Without dead ends: 80 [2023-04-01 19:01:38,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 28.8s TimeCoverageRelationStatistics Valid=283, Invalid=1788, Unknown=11, NotChecked=270, Total=2352 [2023-04-01 19:01:38,614 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 68 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 19:01:38,614 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 119 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 478 Invalid, 0 Unknown, 72 Unchecked, 0.3s Time] [2023-04-01 19:01:38,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-04-01 19:01:38,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 60. [2023-04-01 19:01:38,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 47 states have internal predecessors, (50), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 19:01:38,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2023-04-01 19:01:38,626 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 36 [2023-04-01 19:01:38,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:01:38,626 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2023-04-01 19:01:38,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.962962962962963) internal successors, (53), 24 states have internal predecessors, (53), 6 states have call successors, (9), 6 states have call predecessors, (9), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 19:01:38,626 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2023-04-01 19:01:38,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-04-01 19:01:38,646 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:01:38,646 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:01:38,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 19:01:38,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:01:38,852 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:01:38,852 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:01:38,852 INFO L85 PathProgramCache]: Analyzing trace with hash -200222389, now seen corresponding path program 2 times [2023-04-01 19:01:38,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:01:38,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994166244] [2023-04-01 19:01:38,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:01:38,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:01:38,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:01:39,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:01:39,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:01:39,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-04-01 19:01:39,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:01:39,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-04-01 19:01:39,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:01:39,096 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 19:01:39,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:01:39,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994166244] [2023-04-01 19:01:39,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994166244] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:01:39,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585067050] [2023-04-01 19:01:39,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 19:01:39,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:01:39,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:01:39,113 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) [2023-04-01 19:01:39,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 19:01:39,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 19:01:39,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:01:39,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 19:01:39,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:01:39,359 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 19:01:39,360 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:01:39,586 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 19:01:39,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585067050] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:01:39,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:01:39,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 23 [2023-04-01 19:01:39,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612712441] [2023-04-01 19:01:39,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:01:39,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-01 19:01:39,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:01:39,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-01 19:01:39,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2023-04-01 19:01:39,587 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 19:01:39,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:01:39,988 INFO L93 Difference]: Finished difference Result 105 states and 110 transitions. [2023-04-01 19:01:39,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 19:01:39,989 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 38 [2023-04-01 19:01:39,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:01:39,990 INFO L225 Difference]: With dead ends: 105 [2023-04-01 19:01:39,990 INFO L226 Difference]: Without dead ends: 88 [2023-04-01 19:01:39,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=212, Invalid=658, Unknown=0, NotChecked=0, Total=870 [2023-04-01 19:01:39,990 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 103 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 19:01:39,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 87 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 19:01:39,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-04-01 19:01:40,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2023-04-01 19:01:40,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 49 states have internal predecessors, (52), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 19:01:40,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2023-04-01 19:01:40,008 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 38 [2023-04-01 19:01:40,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:01:40,008 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2023-04-01 19:01:40,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 4 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2023-04-01 19:01:40,009 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2023-04-01 19:01:40,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-01 19:01:40,010 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:01:40,010 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:01:40,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 19:01:40,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:01:40,211 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:01:40,211 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:01:40,212 INFO L85 PathProgramCache]: Analyzing trace with hash -994416951, now seen corresponding path program 3 times [2023-04-01 19:01:40,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:01:40,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732995170] [2023-04-01 19:01:40,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:01:40,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:01:40,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:01:40,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:01:40,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:01:40,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-04-01 19:01:40,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:01:40,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-04-01 19:01:40,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:01:40,543 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 19:01:40,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:01:40,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732995170] [2023-04-01 19:01:40,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732995170] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:01:40,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770783576] [2023-04-01 19:01:40,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 19:01:40,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:01:40,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:01:40,544 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) [2023-04-01 19:01:40,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 19:01:40,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 19:01:40,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:01:40,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 35 conjunts are in the unsatisfiable core [2023-04-01 19:01:40,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:01:40,647 INFO L350 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 10 treesize of output 8 [2023-04-01 19:01:40,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:01:40,799 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-04-01 19:01:40,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 30 [2023-04-01 19:01:42,870 WARN L861 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0.base_BEFORE_CALL_7 Int) (v_main_~acopy~0.base_BEFORE_CALL_7 Int)) (and (not (= v_main_~a~0.base_BEFORE_CALL_7 v_main_~acopy~0.base_BEFORE_CALL_7)) (= (select (select |c_#memory_int| v_main_~acopy~0.base_BEFORE_CALL_7) 4) (select (select |c_#memory_int| v_main_~a~0.base_BEFORE_CALL_7) 4)))) is different from true [2023-04-01 19:01:47,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2023-04-01 19:01:49,061 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 1 not checked. [2023-04-01 19:01:49,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:01:51,195 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 19:01:51,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 938 treesize of output 882 [2023-04-01 19:01:51,206 INFO L350 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 392 treesize of output 338 [2023-04-01 19:01:51,226 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 19:01:51,226 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 29 [2023-04-01 19:01:51,267 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 19:01:51,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 298 treesize of output 274 [2023-04-01 19:01:51,688 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-01 19:01:51,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770783576] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:01:51,689 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:01:51,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14, 11] total 31 [2023-04-01 19:01:51,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051335122] [2023-04-01 19:01:51,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:01:51,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-04-01 19:01:51,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:01:51,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-04-01 19:01:51,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=776, Unknown=3, NotChecked=56, Total=930 [2023-04-01 19:01:51,691 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 31 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 27 states have internal predecessors, (71), 8 states have call successors, (12), 6 states have call predecessors, (12), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 19:02:39,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:02:41,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:02:41,483 INFO L93 Difference]: Finished difference Result 134 states and 145 transitions. [2023-04-01 19:02:41,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-04-01 19:02:41,483 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 27 states have internal predecessors, (71), 8 states have call successors, (12), 6 states have call predecessors, (12), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 40 [2023-04-01 19:02:41,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:02:41,484 INFO L225 Difference]: With dead ends: 134 [2023-04-01 19:02:41,484 INFO L226 Difference]: Without dead ends: 72 [2023-04-01 19:02:41,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 960 ImplicationChecksByTransitivity, 57.8s TimeCoverageRelationStatistics Valid=640, Invalid=3912, Unknown=8, NotChecked=132, Total=4692 [2023-04-01 19:02:41,486 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 141 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 104 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-04-01 19:02:41,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 154 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 682 Invalid, 1 Unknown, 110 Unchecked, 2.4s Time] [2023-04-01 19:02:41,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-04-01 19:02:41,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2023-04-01 19:02:41,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 42 states have internal predecessors, (44), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 19:02:41,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2023-04-01 19:02:41,494 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 40 [2023-04-01 19:02:41,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:02:41,494 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2023-04-01 19:02:41,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 27 states have internal predecessors, (71), 8 states have call successors, (12), 6 states have call predecessors, (12), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 19:02:41,494 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2023-04-01 19:02:41,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-04-01 19:02:41,495 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:02:41,495 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:02:41,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 19:02:41,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:02:41,700 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:02:41,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:02:41,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1616901542, now seen corresponding path program 4 times [2023-04-01 19:02:41,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:02:41,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237092176] [2023-04-01 19:02:41,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:02:41,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:02:41,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:02:42,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:02:42,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:02:42,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-04-01 19:02:42,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:02:42,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-04-01 19:02:42,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:02:42,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-04-01 19:02:42,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:02:42,555 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 19:02:42,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:02:42,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237092176] [2023-04-01 19:02:42,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237092176] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:02:42,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185418947] [2023-04-01 19:02:42,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 19:02:42,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:02:42,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:02:42,575 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) [2023-04-01 19:02:42,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 19:02:42,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 19:02:42,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:02:42,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 40 conjunts are in the unsatisfiable core [2023-04-01 19:02:42,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:02:42,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:02:42,887 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-04-01 19:02:42,887 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 30 [2023-04-01 19:02:43,551 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 19:02:43,560 INFO L321 Elim1Store]: treesize reduction 32, result has 17.9 percent of original size [2023-04-01 19:02:43,560 INFO L350 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 46 treesize of output 16 [2023-04-01 19:02:43,614 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-04-01 19:02:43,614 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:02:43,948 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 19:02:43,949 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 582 treesize of output 550 [2023-04-01 19:02:44,147 INFO L321 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2023-04-01 19:02:44,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 79 [2023-04-01 19:02:44,167 INFO L321 Elim1Store]: treesize reduction 5, result has 50.0 percent of original size [2023-04-01 19:02:44,168 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 31 [2023-04-01 19:02:44,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:02:44,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 120 treesize of output 51 [2023-04-01 19:02:44,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:02:44,179 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 19:02:44,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:02:44,186 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 19:02:44,187 INFO L350 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 13 treesize of output 3 [2023-04-01 19:02:44,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:02:44,199 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 25 [2023-04-01 19:02:44,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:02:44,202 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 19:02:44,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:02:44,211 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 25 [2023-04-01 19:02:44,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:02:44,214 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 19:02:44,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:02:44,219 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 19:02:44,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:02:44,223 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 51 [2023-04-01 19:02:44,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:02:44,226 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 19:02:44,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:02:44,233 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 51 [2023-04-01 19:02:44,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:02:44,236 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 19:02:44,461 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-01 19:02:44,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185418947] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:02:44,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:02:44,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 15] total 46 [2023-04-01 19:02:44,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201012739] [2023-04-01 19:02:44,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:02:44,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-04-01 19:02:44,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:02:44,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-04-01 19:02:44,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1799, Unknown=0, NotChecked=0, Total=2070 [2023-04-01 19:02:44,464 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 46 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 43 states have internal predecessors, (87), 11 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 19:02:47,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:02:47,594 INFO L93 Difference]: Finished difference Result 202 states and 225 transitions. [2023-04-01 19:02:47,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2023-04-01 19:02:47,595 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 43 states have internal predecessors, (87), 11 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 50 [2023-04-01 19:02:47,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:02:47,596 INFO L225 Difference]: With dead ends: 202 [2023-04-01 19:02:47,596 INFO L226 Difference]: Without dead ends: 175 [2023-04-01 19:02:47,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3096 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1685, Invalid=9871, Unknown=0, NotChecked=0, Total=11556 [2023-04-01 19:02:47,598 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 348 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 1302 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 1553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 1302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 19:02:47,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [352 Valid, 252 Invalid, 1553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 1302 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 19:02:47,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-04-01 19:02:47,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 148. [2023-04-01 19:02:47,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 114 states have (on average 1.0614035087719298) internal successors, (121), 118 states have internal predecessors, (121), 22 states have call successors, (22), 12 states have call predecessors, (22), 11 states have return successors, (21), 17 states have call predecessors, (21), 21 states have call successors, (21) [2023-04-01 19:02:47,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 164 transitions. [2023-04-01 19:02:47,628 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 164 transitions. Word has length 50 [2023-04-01 19:02:47,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:02:47,628 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 164 transitions. [2023-04-01 19:02:47,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 43 states have internal predecessors, (87), 11 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 19:02:47,629 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 164 transitions. [2023-04-01 19:02:47,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 19:02:47,630 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:02:47,630 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:02:47,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 19:02:47,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:02:47,836 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:02:47,836 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:02:47,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1803238476, now seen corresponding path program 5 times [2023-04-01 19:02:47,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:02:47,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586619434] [2023-04-01 19:02:47,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:02:47,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:02:47,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:02:48,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:02:48,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:02:48,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 19:02:48,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:02:48,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-04-01 19:02:48,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:02:48,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-04-01 19:02:48,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:02:48,222 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 30 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 19:02:48,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:02:48,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586619434] [2023-04-01 19:02:48,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586619434] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:02:48,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523793195] [2023-04-01 19:02:48,222 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 19:02:48,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:02:48,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:02:48,223 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) [2023-04-01 19:02:48,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 19:02:48,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-04-01 19:02:48,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:02:48,484 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-01 19:02:48,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:02:48,725 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-04-01 19:02:48,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:02:49,133 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 20 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 19:02:49,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523793195] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:02:49,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:02:49,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 39 [2023-04-01 19:02:49,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240069926] [2023-04-01 19:02:49,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:02:49,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-04-01 19:02:49,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:02:49,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-04-01 19:02:49,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1212, Unknown=0, NotChecked=0, Total=1482 [2023-04-01 19:02:49,135 INFO L87 Difference]: Start difference. First operand 148 states and 164 transitions. Second operand has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 19:02:51,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:02:51,066 INFO L93 Difference]: Finished difference Result 388 states and 428 transitions. [2023-04-01 19:02:51,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-04-01 19:02:51,066 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 56 [2023-04-01 19:02:51,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:02:51,067 INFO L225 Difference]: With dead ends: 388 [2023-04-01 19:02:51,067 INFO L226 Difference]: Without dead ends: 283 [2023-04-01 19:02:51,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2071 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1242, Invalid=6414, Unknown=0, NotChecked=0, Total=7656 [2023-04-01 19:02:51,069 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 701 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 1140 mSolverCounterSat, 640 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 1780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 640 IncrementalHoareTripleChecker+Valid, 1140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-04-01 19:02:51,069 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [706 Valid, 191 Invalid, 1780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [640 Valid, 1140 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-04-01 19:02:51,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2023-04-01 19:02:51,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 176. [2023-04-01 19:02:51,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 139 states have (on average 1.0719424460431655) internal successors, (149), 141 states have internal predecessors, (149), 20 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2023-04-01 19:02:51,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 187 transitions. [2023-04-01 19:02:51,105 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 187 transitions. Word has length 56 [2023-04-01 19:02:51,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:02:51,105 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 187 transitions. [2023-04-01 19:02:51,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 5 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-04-01 19:02:51,105 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 187 transitions. [2023-04-01 19:02:51,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-04-01 19:02:51,106 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:02:51,106 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:02:51,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 19:02:51,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:02:51,314 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:02:51,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:02:51,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1424375437, now seen corresponding path program 6 times [2023-04-01 19:02:51,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:02:51,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959182216] [2023-04-01 19:02:51,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:02:51,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:02:51,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:02:52,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:02:52,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:02:52,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-04-01 19:02:52,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:02:52,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-04-01 19:02:52,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:02:52,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-04-01 19:02:52,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:02:52,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2023-04-01 19:02:52,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:02:52,513 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 38 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 19:02:52,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:02:52,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959182216] [2023-04-01 19:02:52,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959182216] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:02:52,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148652477] [2023-04-01 19:02:52,513 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-01 19:02:52,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:02:52,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:02:52,532 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) [2023-04-01 19:02:52,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 19:02:52,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-04-01 19:02:52,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:02:52,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 56 conjunts are in the unsatisfiable core [2023-04-01 19:02:52,643 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:02:52,652 INFO L350 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 10 treesize of output 8 [2023-04-01 19:02:52,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 19:02:52,871 INFO L321 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2023-04-01 19:02:52,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 34 [2023-04-01 19:02:52,969 INFO L321 Elim1Store]: treesize reduction 32, result has 49.2 percent of original size [2023-04-01 19:02:52,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 56 [2023-04-01 19:03:17,201 WARN L223 SmtUtils]: Spent 12.03s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 19:03:58,360 WARN L223 SmtUtils]: Spent 12.03s on a formula simplification that was a NOOP. DAG size: 27 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 19:04:10,434 WARN L223 SmtUtils]: Spent 12.03s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 19:04:10,593 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 19:04:10,594 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 10 [2023-04-01 19:04:10,636 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-04-01 19:04:10,636 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:04:11,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148652477] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:04:11,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 19:04:11,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 41 [2023-04-01 19:04:11,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886605650] [2023-04-01 19:04:11,231 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 19:04:11,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-04-01 19:04:11,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:04:11,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-04-01 19:04:11,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=2176, Unknown=6, NotChecked=0, Total=2450 [2023-04-01 19:04:11,233 INFO L87 Difference]: Start difference. First operand 176 states and 187 transitions. Second operand has 41 states, 40 states have (on average 2.0) internal successors, (80), 38 states have internal predecessors, (80), 10 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-01 19:04:13,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:04:15,249 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:04:17,264 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:04:19,279 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:04:23,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:04:27,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:04:29,499 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:04:31,511 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:04:33,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:04:35,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:04:37,644 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:04:39,666 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:04:53,973 WARN L223 SmtUtils]: Spent 12.03s on a formula simplification that was a NOOP. DAG size: 35 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 19:05:06,035 WARN L223 SmtUtils]: Spent 12.03s on a formula simplification that was a NOOP. DAG size: 38 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 19:05:30,177 WARN L223 SmtUtils]: Spent 24.10s on a formula simplification. DAG size of input: 43 DAG size of output: 41 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)