/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-cav19/array_init_var_plus_ind2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 19:40:03,273 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 19:40:03,274 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 19:40:03,304 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 19:40:03,321 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 19:40:03,325 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 19:40:03,327 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 19:40:03,328 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 19:40:03,329 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 19:40:03,329 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 19:40:03,331 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 19:40:03,336 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 19:40:03,337 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 19:40:03,338 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 19:40:03,338 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 19:40:03,340 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 19:40:03,347 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 19:40:03,354 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 19:40:03,355 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 19:40:03,355 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 19:40:03,356 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 19:40:03,390 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 19:40:03,390 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 19:40:03,391 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 19:40:03,391 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 19:40:03,392 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 19:40:03,393 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 19:40:03,393 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 19:40:03,394 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 19:40:03,394 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 19:40:03,394 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 19:40:03,395 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 19:40:03,395 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 19:40:03,395 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 19:40:03,395 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 19:40:03,395 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 19:40:03,395 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 19:40:03,396 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 19:40:03,396 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 19:40:03,396 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 19:40:03,396 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 19:40:03,396 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 19:40:03,396 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 19:40:03,397 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 19:40:03,397 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 19:40:03,397 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 19:40:03,397 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 19:40:03,397 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 19:40:03,398 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 19:40:03,398 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 19:40:03,398 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 19:40:03,398 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 19:40:03,398 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 19:40:03,398 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 19:40:03,398 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 19:40:03,399 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 19:40:03,399 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 19:40:03,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 19:40:03,676 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 19:40:03,679 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 19:40:03,680 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 19:40:03,680 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 19:40:03,681 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_init_var_plus_ind2.c [2023-04-01 19:40:04,832 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 19:40:05,019 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 19:40:05,020 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_var_plus_ind2.c [2023-04-01 19:40:05,025 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/684c395ac/5b6f6a1917ad4e2999a45efaea798f1b/FLAG06b4654db [2023-04-01 19:40:05,037 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/684c395ac/5b6f6a1917ad4e2999a45efaea798f1b [2023-04-01 19:40:05,039 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 19:40:05,040 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 19:40:05,041 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 19:40:05,041 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 19:40:05,047 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 19:40:05,047 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 07:40:05" (1/1) ... [2023-04-01 19:40:05,048 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@aeca179 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:40:05, skipping insertion in model container [2023-04-01 19:40:05,048 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 07:40:05" (1/1) ... [2023-04-01 19:40:05,054 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 19:40:05,065 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 19:40:05,176 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-cav19/array_init_var_plus_ind2.c[415,428] [2023-04-01 19:40:05,189 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 19:40:05,198 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 19:40:05,207 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-cav19/array_init_var_plus_ind2.c[415,428] [2023-04-01 19:40:05,213 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 19:40:05,225 INFO L208 MainTranslator]: Completed translation [2023-04-01 19:40:05,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:40:05 WrapperNode [2023-04-01 19:40:05,225 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 19:40:05,226 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 19:40:05,227 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 19:40:05,227 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 19:40:05,236 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:40:05" (1/1) ... [2023-04-01 19:40:05,236 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:40:05" (1/1) ... [2023-04-01 19:40:05,242 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:40:05" (1/1) ... [2023-04-01 19:40:05,242 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:40:05" (1/1) ... [2023-04-01 19:40:05,247 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:40:05" (1/1) ... [2023-04-01 19:40:05,251 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:40:05" (1/1) ... [2023-04-01 19:40:05,252 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:40:05" (1/1) ... [2023-04-01 19:40:05,252 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:40:05" (1/1) ... [2023-04-01 19:40:05,254 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 19:40:05,254 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 19:40:05,255 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 19:40:05,255 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 19:40:05,257 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:40:05" (1/1) ... [2023-04-01 19:40:05,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 19:40:05,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:40:05,293 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 19:40:05,295 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 19:40:05,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 19:40:05,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 19:40:05,322 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 19:40:05,322 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 19:40:05,322 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 19:40:05,322 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 19:40:05,323 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 19:40:05,323 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 19:40:05,323 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 19:40:05,323 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 19:40:05,323 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 19:40:05,323 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 19:40:05,323 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 19:40:05,324 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 19:40:05,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 19:40:05,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 19:40:05,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 19:40:05,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 19:40:05,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 19:40:05,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 19:40:05,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 19:40:05,386 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 19:40:05,388 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 19:40:05,596 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 19:40:05,606 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 19:40:05,606 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 19:40:05,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 07:40:05 BoogieIcfgContainer [2023-04-01 19:40:05,608 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 19:40:05,619 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 19:40:05,619 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 19:40:05,622 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 19:40:05,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 07:40:05" (1/3) ... [2023-04-01 19:40:05,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@622ae57b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 07:40:05, skipping insertion in model container [2023-04-01 19:40:05,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:40:05" (2/3) ... [2023-04-01 19:40:05,623 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@622ae57b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 07:40:05, skipping insertion in model container [2023-04-01 19:40:05,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 07:40:05" (3/3) ... [2023-04-01 19:40:05,625 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_var_plus_ind2.c [2023-04-01 19:40:05,660 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 19:40:05,660 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 19:40:05,701 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 19:40:05,706 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;@78a391a5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 19:40:05,707 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 19:40:05,711 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 19:40:05,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-01 19:40:05,719 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:40:05,719 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:40:05,720 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:40:05,728 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:40:05,728 INFO L85 PathProgramCache]: Analyzing trace with hash 525097511, now seen corresponding path program 1 times [2023-04-01 19:40:05,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:40:05,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759823754] [2023-04-01 19:40:05,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:40:05,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:40:05,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:05,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:40:05,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:06,004 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 19:40:06,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:40:06,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759823754] [2023-04-01 19:40:06,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759823754] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:40:06,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 19:40:06,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 19:40:06,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613162411] [2023-04-01 19:40:06,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:40:06,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 19:40:06,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:40:06,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 19:40:06,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 19:40:06,071 INFO L87 Difference]: Start difference. First operand has 25 states, 17 states have (on average 1.411764705882353) internal successors, (24), 18 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:40:06,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:40:06,239 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2023-04-01 19:40:06,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 19:40:06,243 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-04-01 19:40:06,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:40:06,249 INFO L225 Difference]: With dead ends: 52 [2023-04-01 19:40:06,250 INFO L226 Difference]: Without dead ends: 28 [2023-04-01 19:40:06,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-04-01 19:40:06,260 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 58 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:40:06,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 12 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:40:06,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-01 19:40:06,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2023-04-01 19:40:06,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 19:40:06,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-04-01 19:40:06,318 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 13 [2023-04-01 19:40:06,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:40:06,318 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-04-01 19:40:06,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:40:06,319 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-04-01 19:40:06,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 19:40:06,319 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:40:06,320 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:40:06,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 19:40:06,320 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:40:06,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:40:06,321 INFO L85 PathProgramCache]: Analyzing trace with hash -474007766, now seen corresponding path program 1 times [2023-04-01 19:40:06,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:40:06,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739568844] [2023-04-01 19:40:06,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:40:06,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:40:06,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:06,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:40:06,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:06,424 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 19:40:06,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:40:06,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739568844] [2023-04-01 19:40:06,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739568844] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:40:06,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 19:40:06,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 19:40:06,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713221270] [2023-04-01 19:40:06,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:40:06,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 19:40:06,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:40:06,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 19:40:06,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 19:40:06,428 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:40:06,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:40:06,502 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2023-04-01 19:40:06,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 19:40:06,503 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-04-01 19:40:06,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:40:06,505 INFO L225 Difference]: With dead ends: 35 [2023-04-01 19:40:06,505 INFO L226 Difference]: Without dead ends: 23 [2023-04-01 19:40:06,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-04-01 19:40:06,512 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 22 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 19:40:06,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 12 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 19:40:06,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-01 19:40:06,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2023-04-01 19:40:06,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 19:40:06,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2023-04-01 19:40:06,527 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 14 [2023-04-01 19:40:06,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:40:06,527 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2023-04-01 19:40:06,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:40:06,527 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2023-04-01 19:40:06,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-01 19:40:06,528 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:40:06,528 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:40:06,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 19:40:06,528 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:40:06,529 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:40:06,529 INFO L85 PathProgramCache]: Analyzing trace with hash -400894909, now seen corresponding path program 1 times [2023-04-01 19:40:06,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:40:06,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094233430] [2023-04-01 19:40:06,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:40:06,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:40:06,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:06,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:40:06,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:06,706 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 19:40:06,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:40:06,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094233430] [2023-04-01 19:40:06,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094233430] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:40:06,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357809307] [2023-04-01 19:40:06,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:40:06,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:40:06,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:40:06,713 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 19:40:06,736 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 19:40:06,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:06,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 19:40:06,788 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:40:06,883 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 19:40:06,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:40:06,949 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 19:40:06,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357809307] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:40:06,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:40:06,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2023-04-01 19:40:06,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740869508] [2023-04-01 19:40:06,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:40:06,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 19:40:06,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:40:06,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 19:40:06,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-04-01 19:40:06,958 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 19:40:07,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:40:07,171 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2023-04-01 19:40:07,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 19:40:07,171 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 16 [2023-04-01 19:40:07,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:40:07,174 INFO L225 Difference]: With dead ends: 53 [2023-04-01 19:40:07,174 INFO L226 Difference]: Without dead ends: 40 [2023-04-01 19:40:07,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2023-04-01 19:40:07,178 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 108 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:40:07,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 18 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:40:07,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-04-01 19:40:07,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2023-04-01 19:40:07,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 19:40:07,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2023-04-01 19:40:07,192 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 16 [2023-04-01 19:40:07,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:40:07,193 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2023-04-01 19:40:07,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 19:40:07,193 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2023-04-01 19:40:07,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 19:40:07,196 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:40:07,196 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:40:07,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 19:40:07,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:40:07,403 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:40:07,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:40:07,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1622405974, now seen corresponding path program 1 times [2023-04-01 19:40:07,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:40:07,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313287768] [2023-04-01 19:40:07,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:40:07,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:40:07,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:07,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:40:07,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:07,853 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:40:07,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:40:07,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313287768] [2023-04-01 19:40:07,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313287768] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:40:07,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292530912] [2023-04-01 19:40:07,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:40:07,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:40:07,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:40:07,857 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 19:40:07,882 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 19:40:07,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:07,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 23 conjunts are in the unsatisfiable core [2023-04-01 19:40:07,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:40:08,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 19:40:08,152 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 19:40:08,259 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:40:08,259 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:40:08,344 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 17 [2023-04-01 19:40:08,349 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 26 treesize of output 22 [2023-04-01 19:40:08,445 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:40:08,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292530912] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:40:08,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:40:08,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 24 [2023-04-01 19:40:08,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457885380] [2023-04-01 19:40:08,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:40:08,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-04-01 19:40:08,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:40:08,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-04-01 19:40:08,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2023-04-01 19:40:08,449 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 24 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:40:08,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:40:08,846 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2023-04-01 19:40:08,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-04-01 19:40:08,847 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-04-01 19:40:08,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:40:08,849 INFO L225 Difference]: With dead ends: 45 [2023-04-01 19:40:08,849 INFO L226 Difference]: Without dead ends: 43 [2023-04-01 19:40:08,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 19:40:08,852 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 46 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 19:40:08,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 71 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 19:40:08,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-04-01 19:40:08,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2023-04-01 19:40:08,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 19:40:08,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2023-04-01 19:40:08,865 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 20 [2023-04-01 19:40:08,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:40:08,866 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2023-04-01 19:40:08,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 21 states have (on average 1.9523809523809523) internal successors, (41), 21 states have internal predecessors, (41), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:40:08,866 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2023-04-01 19:40:08,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 19:40:08,867 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:40:08,867 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:40:08,877 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 19:40:09,073 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 19:40:09,073 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:40:09,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:40:09,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1631503602, now seen corresponding path program 2 times [2023-04-01 19:40:09,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:40:09,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087997515] [2023-04-01 19:40:09,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:40:09,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:40:09,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:09,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:40:09,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:09,384 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:40:09,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:40:09,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087997515] [2023-04-01 19:40:09,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087997515] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:40:09,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762820362] [2023-04-01 19:40:09,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 19:40:09,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:40:09,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:40:09,386 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 19:40:09,388 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 19:40:09,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 19:40:09,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:40:09,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 27 conjunts are in the unsatisfiable core [2023-04-01 19:40:09,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:40:09,524 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 19:40:09,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:40:09,587 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 0 case distinctions, treesize of input 21 treesize of output 20 [2023-04-01 19:40:09,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 19:40:09,715 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:40:09,716 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:40:09,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2023-04-01 19:40:09,925 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 62 treesize of output 58 [2023-04-01 19:40:10,050 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:40:10,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762820362] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:40:10,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:40:10,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 29 [2023-04-01 19:40:10,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697137429] [2023-04-01 19:40:10,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:40:10,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-04-01 19:40:10,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:40:10,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-04-01 19:40:10,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=726, Unknown=0, NotChecked=0, Total=812 [2023-04-01 19:40:10,056 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 29 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:40:10,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:40:10,632 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2023-04-01 19:40:10,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 19:40:10,633 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-04-01 19:40:10,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:40:10,633 INFO L225 Difference]: With dead ends: 53 [2023-04-01 19:40:10,634 INFO L226 Difference]: Without dead ends: 51 [2023-04-01 19:40:10,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=206, Invalid=1434, Unknown=0, NotChecked=0, Total=1640 [2023-04-01 19:40:10,635 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 65 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 19:40:10,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 85 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 19:40:10,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-04-01 19:40:10,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 36. [2023-04-01 19:40:10,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 states have internal predecessors, (32), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 19:40:10,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2023-04-01 19:40:10,645 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 23 [2023-04-01 19:40:10,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:40:10,645 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2023-04-01 19:40:10,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 4 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:40:10,646 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2023-04-01 19:40:10,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 19:40:10,647 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:40:10,647 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:40:10,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 19:40:10,852 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 19:40:10,853 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:40:10,853 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:40:10,853 INFO L85 PathProgramCache]: Analyzing trace with hash 942859908, now seen corresponding path program 1 times [2023-04-01 19:40:10,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:40:10,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832744814] [2023-04-01 19:40:10,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:40:10,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:40:10,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:10,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:40:10,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:10,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-04-01 19:40:10,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:10,947 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:40:10,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:40:10,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832744814] [2023-04-01 19:40:10,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832744814] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:40:10,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529942738] [2023-04-01 19:40:10,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:40:10,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:40:10,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:40:10,950 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 19:40:10,952 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 19:40:10,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:10,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 19:40:11,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:40:11,056 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:40:11,057 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:40:11,105 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:40:11,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529942738] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:40:11,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:40:11,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 12 [2023-04-01 19:40:11,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111407237] [2023-04-01 19:40:11,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:40:11,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 19:40:11,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:40:11,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 19:40:11,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2023-04-01 19:40:11,108 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:40:11,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:40:11,240 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2023-04-01 19:40:11,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 19:40:11,241 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 28 [2023-04-01 19:40:11,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:40:11,242 INFO L225 Difference]: With dead ends: 52 [2023-04-01 19:40:11,242 INFO L226 Difference]: Without dead ends: 36 [2023-04-01 19:40:11,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-04-01 19:40:11,244 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 31 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:40:11,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 22 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:40:11,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-04-01 19:40:11,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-04-01 19:40:11,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 19:40:11,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2023-04-01 19:40:11,256 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 28 [2023-04-01 19:40:11,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:40:11,256 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2023-04-01 19:40:11,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:40:11,258 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2023-04-01 19:40:11,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 19:40:11,262 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:40:11,264 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:40:11,272 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 19:40:11,472 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 19:40:11,473 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:40:11,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:40:11,473 INFO L85 PathProgramCache]: Analyzing trace with hash 693465320, now seen corresponding path program 2 times [2023-04-01 19:40:11,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:40:11,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380836489] [2023-04-01 19:40:11,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:40:11,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:40:11,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:11,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:40:11,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:11,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-04-01 19:40:11,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:11,980 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:40:11,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:40:11,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380836489] [2023-04-01 19:40:11,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380836489] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:40:11,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29760383] [2023-04-01 19:40:11,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 19:40:11,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:40:11,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:40:11,982 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 19:40:11,984 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 19:40:12,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 19:40:12,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:40:12,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 39 conjunts are in the unsatisfiable core [2023-04-01 19:40:12,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:40:12,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 19:40:12,208 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 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 19:40:12,602 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 19:40:12,605 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 19:40:12,605 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 13 [2023-04-01 19:40:12,682 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:40:12,683 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:40:12,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29760383] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:40:12,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 19:40:12,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2023-04-01 19:40:12,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042821350] [2023-04-01 19:40:12,851 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 19:40:12,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-04-01 19:40:12,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:40:12,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-04-01 19:40:12,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=960, Unknown=0, NotChecked=0, Total=1056 [2023-04-01 19:40:12,853 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 29 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 19:40:15,446 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 19:40:17,520 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:40:19,776 WARN L539 Checker$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 19:40:21,995 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 19:40:22,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:40:22,413 INFO L93 Difference]: Finished difference Result 57 states and 60 transitions. [2023-04-01 19:40:22,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-01 19:40:22,413 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 31 [2023-04-01 19:40:22,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:40:22,414 INFO L225 Difference]: With dead ends: 57 [2023-04-01 19:40:22,414 INFO L226 Difference]: Without dead ends: 37 [2023-04-01 19:40:22,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=224, Invalid=1938, Unknown=0, NotChecked=0, Total=2162 [2023-04-01 19:40:22,416 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 55 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 17 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2023-04-01 19:40:22,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 94 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 626 Invalid, 5 Unknown, 0 Unchecked, 8.9s Time] [2023-04-01 19:40:22,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-04-01 19:40:22,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-04-01 19:40:22,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 19:40:22,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2023-04-01 19:40:22,423 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 31 [2023-04-01 19:40:22,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:40:22,423 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2023-04-01 19:40:22,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 25 states have internal predecessors, (48), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 19:40:22,423 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2023-04-01 19:40:22,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 19:40:22,424 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:40:22,424 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:40:22,435 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 19:40:22,630 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 19:40:22,630 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:40:22,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:40:22,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1283095553, now seen corresponding path program 1 times [2023-04-01 19:40:22,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:40:22,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419437633] [2023-04-01 19:40:22,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:40:22,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:40:22,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:22,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:40:22,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:22,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-04-01 19:40:22,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:22,759 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 19:40:22,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:40:22,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419437633] [2023-04-01 19:40:22,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419437633] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:40:22,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621241624] [2023-04-01 19:40:22,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:40:22,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:40:22,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:40:22,761 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 19:40:22,772 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 19:40:22,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:22,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 19:40:22,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:40:22,924 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 19:40:22,924 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:40:23,019 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-01 19:40:23,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621241624] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:40:23,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:40:23,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2023-04-01 19:40:23,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257133075] [2023-04-01 19:40:23,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:40:23,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-04-01 19:40:23,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:40:23,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-04-01 19:40:23,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=231, Unknown=0, NotChecked=0, Total=380 [2023-04-01 19:40:23,022 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 19:40:23,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:40:23,374 INFO L93 Difference]: Finished difference Result 113 states and 138 transitions. [2023-04-01 19:40:23,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-01 19:40:23,376 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 33 [2023-04-01 19:40:23,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:40:23,377 INFO L225 Difference]: With dead ends: 113 [2023-04-01 19:40:23,377 INFO L226 Difference]: Without dead ends: 96 [2023-04-01 19:40:23,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=329, Invalid=601, Unknown=0, NotChecked=0, Total=930 [2023-04-01 19:40:23,379 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 231 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 19:40:23,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 13 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 19:40:23,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-04-01 19:40:23,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 54. [2023-04-01 19:40:23,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.173913043478261) internal successors, (54), 47 states have internal predecessors, (54), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 19:40:23,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2023-04-01 19:40:23,391 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 33 [2023-04-01 19:40:23,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:40:23,391 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2023-04-01 19:40:23,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.95) internal successors, (59), 19 states have internal predecessors, (59), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-04-01 19:40:23,391 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2023-04-01 19:40:23,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-04-01 19:40:23,392 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:40:23,392 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:40:23,400 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 19:40:23,597 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 19:40:23,598 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:40:23,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:40:23,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1272716292, now seen corresponding path program 3 times [2023-04-01 19:40:23,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:40:23,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298849818] [2023-04-01 19:40:23,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:40:23,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:40:23,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:24,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:40:24,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:24,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-04-01 19:40:24,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:24,127 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:40:24,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:40:24,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298849818] [2023-04-01 19:40:24,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298849818] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:40:24,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280328452] [2023-04-01 19:40:24,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 19:40:24,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:40:24,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:40:24,133 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 19:40:24,159 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 19:40:24,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-04-01 19:40:24,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:40:24,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 31 conjunts are in the unsatisfiable core [2023-04-01 19:40:24,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:40:24,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-04-01 19:40:24,425 INFO L321 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2023-04-01 19:40:24,425 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2023-04-01 19:40:26,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2023-04-01 19:40:26,723 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:40:26,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:40:32,405 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2023-04-01 19:40:32,410 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 62 treesize of output 58 [2023-04-01 19:40:32,622 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:40:32,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280328452] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:40:32,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:40:32,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 38 [2023-04-01 19:40:32,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487638808] [2023-04-01 19:40:32,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:40:32,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-04-01 19:40:32,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:40:32,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-04-01 19:40:32,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1270, Unknown=6, NotChecked=0, Total=1406 [2023-04-01 19:40:32,625 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 38 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 35 states have internal predecessors, (74), 7 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:40:34,732 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 19:40:36,811 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 19:40:37,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:40:37,586 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2023-04-01 19:40:37,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-01 19:40:37,587 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 35 states have internal predecessors, (74), 7 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2023-04-01 19:40:37,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:40:37,588 INFO L225 Difference]: With dead ends: 66 [2023-04-01 19:40:37,588 INFO L226 Difference]: Without dead ends: 64 [2023-04-01 19:40:37,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=283, Invalid=2467, Unknown=6, NotChecked=0, Total=2756 [2023-04-01 19:40:37,590 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 98 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 35 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-04-01 19:40:37,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 78 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 654 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2023-04-01 19:40:37,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-04-01 19:40:37,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2023-04-01 19:40:37,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 53 states have internal predecessors, (60), 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 19:40:37,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2023-04-01 19:40:37,602 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 34 [2023-04-01 19:40:37,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:40:37,602 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2023-04-01 19:40:37,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 35 states have (on average 2.1142857142857143) internal successors, (74), 35 states have internal predecessors, (74), 7 states have call successors, (9), 5 states have call predecessors, (9), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:40:37,602 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2023-04-01 19:40:37,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 19:40:37,603 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:40:37,603 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:40:37,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-04-01 19:40:37,811 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 19:40:37,811 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:40:37,811 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:40:37,811 INFO L85 PathProgramCache]: Analyzing trace with hash 2001927134, now seen corresponding path program 4 times [2023-04-01 19:40:37,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:40:37,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142134811] [2023-04-01 19:40:37,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:40:37,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:40:37,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:38,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:40:38,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:38,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2023-04-01 19:40:38,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:38,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2023-04-01 19:40:38,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:38,387 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 19:40:38,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:40:38,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142134811] [2023-04-01 19:40:38,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142134811] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:40:38,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355124894] [2023-04-01 19:40:38,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 19:40:38,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:40:38,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:40:38,389 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 19:40:38,403 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 19:40:38,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 19:40:38,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:40:38,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 37 conjunts are in the unsatisfiable core [2023-04-01 19:40:38,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:40:38,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-04-01 19:40:39,193 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 19:40:39,194 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 21 treesize of output 10 [2023-04-01 19:40:39,284 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 19:40:39,284 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:40:41,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355124894] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:40:41,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 19:40:41,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2023-04-01 19:40:41,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811803195] [2023-04-01 19:40:41,421 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 19:40:41,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-04-01 19:40:41,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:40:41,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-04-01 19:40:41,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1297, Unknown=1, NotChecked=0, Total=1406 [2023-04-01 19:40:41,423 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 35 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 32 states have internal predecessors, (63), 7 states have call successors, (9), 5 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 19:40:43,508 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 19:40:45,588 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:40:47,679 WARN L539 Checker$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 19:40:49,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:40:52,031 WARN L539 Checker$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 19:40:53,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:40:53,127 INFO L93 Difference]: Finished difference Result 90 states and 97 transitions. [2023-04-01 19:40:53,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 19:40:53,127 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 32 states have internal predecessors, (63), 7 states have call successors, (9), 5 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 42 [2023-04-01 19:40:53,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:40:53,128 INFO L225 Difference]: With dead ends: 90 [2023-04-01 19:40:53,128 INFO L226 Difference]: Without dead ends: 62 [2023-04-01 19:40:53,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=291, Invalid=3014, Unknown=1, NotChecked=0, Total=3306 [2023-04-01 19:40:53,129 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 60 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 15 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2023-04-01 19:40:53,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 76 Invalid, 766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 745 Invalid, 6 Unknown, 0 Unchecked, 11.0s Time] [2023-04-01 19:40:53,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-04-01 19:40:53,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-04-01 19:40:53,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 53 states have internal predecessors, (59), 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 19:40:53,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2023-04-01 19:40:53,140 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 42 [2023-04-01 19:40:53,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:40:53,140 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2023-04-01 19:40:53,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 32 states have internal predecessors, (63), 7 states have call successors, (9), 5 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 19:40:53,141 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2023-04-01 19:40:53,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-04-01 19:40:53,141 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:40:53,142 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:40:53,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-04-01 19:40:53,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-04-01 19:40:53,345 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:40:53,345 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:40:53,345 INFO L85 PathProgramCache]: Analyzing trace with hash 636585794, now seen corresponding path program 5 times [2023-04-01 19:40:53,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:40:53,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499935049] [2023-04-01 19:40:53,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:40:53,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:40:53,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:53,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:40:53,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:53,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-04-01 19:40:53,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:53,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-04-01 19:40:53,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:53,998 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 19:40:53,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:40:53,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499935049] [2023-04-01 19:40:53,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499935049] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:40:53,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451660007] [2023-04-01 19:40:53,999 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 19:40:53,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:40:53,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:40:54,001 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:40:54,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-04-01 19:40:54,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-04-01 19:40:54,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:40:54,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 44 conjunts are in the unsatisfiable core [2023-04-01 19:40:54,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:40:54,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 19:40:54,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:40:54,403 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 0 case distinctions, treesize of input 21 treesize of output 20 [2023-04-01 19:40:54,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 19:40:54,980 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 3 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 19:40:54,981 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:40:59,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2023-04-01 19:40:59,823 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 134 treesize of output 126 [2023-04-01 19:41:00,154 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 19:41:00,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451660007] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:41:00,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:41:00,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 17] total 49 [2023-04-01 19:41:00,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85761943] [2023-04-01 19:41:00,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:41:00,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-04-01 19:41:00,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:41:00,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-04-01 19:41:00,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=2170, Unknown=3, NotChecked=0, Total=2352 [2023-04-01 19:41:00,157 INFO L87 Difference]: Start difference. First operand 62 states and 68 transitions. Second operand has 49 states, 47 states have (on average 2.021276595744681) internal successors, (95), 46 states have internal predecessors, (95), 9 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 19:41:02,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:41:04,877 WARN L539 Checker$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 19:41:06,959 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 19:41:08,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:41:08,020 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2023-04-01 19:41:08,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-04-01 19:41:08,020 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 47 states have (on average 2.021276595744681) internal successors, (95), 46 states have internal predecessors, (95), 9 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 45 [2023-04-01 19:41:08,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:41:08,021 INFO L225 Difference]: With dead ends: 74 [2023-04-01 19:41:08,021 INFO L226 Difference]: Without dead ends: 72 [2023-04-01 19:41:08,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=431, Invalid=4396, Unknown=3, NotChecked=0, Total=4830 [2023-04-01 19:41:08,023 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 105 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 41 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:41:08,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 125 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1036 Invalid, 4 Unknown, 0 Unchecked, 7.1s Time] [2023-04-01 19:41:08,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-04-01 19:41:08,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2023-04-01 19:41:08,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 59 states have internal predecessors, (65), 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 19:41:08,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2023-04-01 19:41:08,043 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 45 [2023-04-01 19:41:08,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:41:08,043 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2023-04-01 19:41:08,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 47 states have (on average 2.021276595744681) internal successors, (95), 46 states have internal predecessors, (95), 9 states have call successors, (11), 5 states have call predecessors, (11), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 19:41:08,044 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2023-04-01 19:41:08,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-04-01 19:41:08,046 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:41:08,046 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:41:08,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-04-01 19:41:08,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:41:08,254 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:41:08,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:41:08,254 INFO L85 PathProgramCache]: Analyzing trace with hash -278902500, now seen corresponding path program 6 times [2023-04-01 19:41:08,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:41:08,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598084147] [2023-04-01 19:41:08,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:41:08,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:41:08,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:08,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:41:08,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:08,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-04-01 19:41:08,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:08,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-04-01 19:41:08,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:08,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-04-01 19:41:08,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:08,934 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 19:41:08,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:41:08,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598084147] [2023-04-01 19:41:08,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598084147] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:41:08,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812167496] [2023-04-01 19:41:08,934 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-01 19:41:08,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:41:08,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:41:08,937 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:41:08,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-04-01 19:41:09,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-04-01 19:41:09,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:41:09,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 37 conjunts are in the unsatisfiable core [2023-04-01 19:41:09,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:41:09,299 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-04-01 19:41:15,904 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 19:41:15,904 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 21 treesize of output 10 [2023-04-01 19:41:16,001 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 15 proven. 49 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 19:41:16,001 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:41:18,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812167496] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:41:18,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 19:41:18,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 39 [2023-04-01 19:41:18,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178245484] [2023-04-01 19:41:18,134 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 19:41:18,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-04-01 19:41:18,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:41:18,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-04-01 19:41:18,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1563, Unknown=2, NotChecked=0, Total=1722 [2023-04-01 19:41:18,136 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 39 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 states have internal predecessors, (72), 9 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 19:41:20,224 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 19:41:22,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:41:24,386 WARN L539 Checker$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 19:41:26,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:41:28,657 WARN L539 Checker$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 19:41:30,782 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 19:41:31,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:41:31,393 INFO L93 Difference]: Finished difference Result 105 states and 111 transitions. [2023-04-01 19:41:31,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-04-01 19:41:31,394 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 states have internal predecessors, (72), 9 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 53 [2023-04-01 19:41:31,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:41:31,394 INFO L225 Difference]: With dead ends: 105 [2023-04-01 19:41:31,394 INFO L226 Difference]: Without dead ends: 70 [2023-04-01 19:41:31,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=377, Invalid=3653, Unknown=2, NotChecked=0, Total=4032 [2023-04-01 19:41:31,396 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 58 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 13 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2023-04-01 19:41:31,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 110 Invalid, 1256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1237 Invalid, 6 Unknown, 0 Unchecked, 12.7s Time] [2023-04-01 19:41:31,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-04-01 19:41:31,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2023-04-01 19:41:31,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 58 states have (on average 1.103448275862069) internal successors, (64), 59 states have internal predecessors, (64), 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 19:41:31,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2023-04-01 19:41:31,408 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 53 [2023-04-01 19:41:31,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:41:31,408 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2023-04-01 19:41:31,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.945945945945946) internal successors, (72), 36 states have internal predecessors, (72), 9 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 19:41:31,408 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2023-04-01 19:41:31,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-04-01 19:41:31,409 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:41:31,409 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:41:31,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-04-01 19:41:31,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-04-01 19:41:31,620 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:41:31,621 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:41:31,621 INFO L85 PathProgramCache]: Analyzing trace with hash 137459512, now seen corresponding path program 7 times [2023-04-01 19:41:31,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:41:31,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920745797] [2023-04-01 19:41:31,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:41:31,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:41:31,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:32,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:41:32,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:32,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-04-01 19:41:32,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:32,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-04-01 19:41:32,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:32,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-04-01 19:41:32,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:32,340 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 75 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 19:41:32,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:41:32,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920745797] [2023-04-01 19:41:32,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920745797] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:41:32,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638064240] [2023-04-01 19:41:32,341 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 19:41:32,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:41:32,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:41:32,342 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:41:32,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-04-01 19:41:32,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:32,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 45 conjunts are in the unsatisfiable core [2023-04-01 19:41:32,442 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:41:32,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 19:41:32,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:41:32,898 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 0 case distinctions, treesize of input 21 treesize of output 20 [2023-04-01 19:41:33,485 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 19:41:33,600 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 19:41:33,600 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:41:36,093 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2023-04-01 19:41:36,097 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 134 treesize of output 126 [2023-04-01 19:41:36,565 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 75 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 19:41:36,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638064240] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:41:36,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:41:36,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 20] total 57 [2023-04-01 19:41:36,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037381133] [2023-04-01 19:41:36,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:41:36,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-04-01 19:41:36,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:41:36,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-04-01 19:41:36,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=2980, Unknown=1, NotChecked=0, Total=3192 [2023-04-01 19:41:36,568 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand has 57 states, 54 states have (on average 2.037037037037037) internal successors, (110), 54 states have internal predecessors, (110), 13 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 19:41:39,222 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 19:41:41,294 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:41:43,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:41:44,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:41:44,404 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2023-04-01 19:41:44,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-01 19:41:44,405 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 54 states have (on average 2.037037037037037) internal successors, (110), 54 states have internal predecessors, (110), 13 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 56 [2023-04-01 19:41:44,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:41:44,405 INFO L225 Difference]: With dead ends: 82 [2023-04-01 19:41:44,406 INFO L226 Difference]: Without dead ends: 80 [2023-04-01 19:41:44,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 81 SyntacticMatches, 5 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1448 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=428, Invalid=5423, Unknown=1, NotChecked=0, Total=5852 [2023-04-01 19:41:44,407 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 97 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 1289 mSolverCounterSat, 38 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1289 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2023-04-01 19:41:44,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 130 Invalid, 1331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1289 Invalid, 4 Unknown, 0 Unchecked, 7.2s Time] [2023-04-01 19:41:44,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-04-01 19:41:44,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 78. [2023-04-01 19:41:44,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 64 states have (on average 1.09375) internal successors, (70), 65 states have internal predecessors, (70), 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 19:41:44,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2023-04-01 19:41:44,421 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 56 [2023-04-01 19:41:44,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:41:44,421 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2023-04-01 19:41:44,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 54 states have (on average 2.037037037037037) internal successors, (110), 54 states have internal predecessors, (110), 13 states have call successors, (15), 5 states have call predecessors, (15), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-04-01 19:41:44,422 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2023-04-01 19:41:44,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-01 19:41:44,423 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:41:44,423 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:41:44,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-04-01 19:41:44,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-04-01 19:41:44,628 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:41:44,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:41:44,629 INFO L85 PathProgramCache]: Analyzing trace with hash -2147228910, now seen corresponding path program 8 times [2023-04-01 19:41:44,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:41:44,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041015532] [2023-04-01 19:41:44,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:41:44,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:41:44,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:45,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:41:45,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:45,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-04-01 19:41:45,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:45,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-04-01 19:41:45,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:45,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-04-01 19:41:45,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:45,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2023-04-01 19:41:45,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:45,330 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 8 proven. 89 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 19:41:45,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:41:45,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041015532] [2023-04-01 19:41:45,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041015532] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:41:45,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175052343] [2023-04-01 19:41:45,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 19:41:45,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:41:45,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:41:45,333 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:41:45,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-04-01 19:41:45,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 19:41:45,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:41:45,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 57 conjunts are in the unsatisfiable core [2023-04-01 19:41:45,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:41:45,780 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 19:41:45,888 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 0 case distinctions, treesize of input 19 treesize of output 18 [2023-04-01 19:41:46,888 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 19:41:46,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:41:46,891 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 19:41:46,891 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 13 [2023-04-01 19:41:46,990 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 9 proven. 97 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 19:41:46,990 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:41:47,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175052343] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:41:47,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 19:41:47,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26] total 48 [2023-04-01 19:41:47,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219357375] [2023-04-01 19:41:47,514 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 19:41:47,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-04-01 19:41:47,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:41:47,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-04-01 19:41:47,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2474, Unknown=1, NotChecked=0, Total=2652 [2023-04-01 19:41:47,516 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand has 48 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 45 states have internal predecessors, (87), 11 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-01 19:41:49,576 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:41:51,632 WARN L539 Checker$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 19:41:53,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:41:55,792 WARN L539 Checker$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 19:41:57,874 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:42:00,083 WARN L539 Checker$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 19:42:02,207 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 19:42:02,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:42:02,991 INFO L93 Difference]: Finished difference Result 122 states and 127 transitions. [2023-04-01 19:42:02,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-04-01 19:42:02,991 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 45 states have internal predecessors, (87), 11 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2023-04-01 19:42:02,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:42:02,993 INFO L225 Difference]: With dead ends: 122 [2023-04-01 19:42:02,993 INFO L226 Difference]: Without dead ends: 78 [2023-04-01 19:42:02,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 48 SyntacticMatches, 7 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=413, Invalid=5592, Unknown=1, NotChecked=0, Total=6006 [2023-04-01 19:42:02,995 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 63 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 1497 mSolverCounterSat, 19 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1497 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.7s IncrementalHoareTripleChecker+Time [2023-04-01 19:42:02,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 120 Invalid, 1523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1497 Invalid, 7 Unknown, 0 Unchecked, 14.7s Time] [2023-04-01 19:42:02,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-04-01 19:42:03,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2023-04-01 19:42:03,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 64 states have (on average 1.078125) internal successors, (69), 65 states have internal predecessors, (69), 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 19:42:03,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2023-04-01 19:42:03,008 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 64 [2023-04-01 19:42:03,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:42:03,009 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2023-04-01 19:42:03,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 45 states have internal predecessors, (87), 11 states have call successors, (13), 5 states have call predecessors, (13), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-01 19:42:03,009 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2023-04-01 19:42:03,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-01 19:42:03,010 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:42:03,010 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:42:03,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-04-01 19:42:03,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-04-01 19:42:03,216 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:42:03,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:42:03,216 INFO L85 PathProgramCache]: Analyzing trace with hash 767036278, now seen corresponding path program 9 times [2023-04-01 19:42:03,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:42:03,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419780526] [2023-04-01 19:42:03,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:42:03,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:42:03,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:03,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:42:03,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:03,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-04-01 19:42:03,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:03,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-04-01 19:42:03,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:03,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-04-01 19:42:03,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:03,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-04-01 19:42:03,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:03,989 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 8 proven. 109 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 19:42:03,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:42:03,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419780526] [2023-04-01 19:42:03,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419780526] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:42:03,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499179082] [2023-04-01 19:42:03,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 19:42:03,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:42:03,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:42:03,994 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:42:04,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-04-01 19:42:04,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-04-01 19:42:04,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:42:04,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 56 conjunts are in the unsatisfiable core [2023-04-01 19:42:04,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:42:04,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 19:42:04,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:42:04,701 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 0 case distinctions, treesize of input 21 treesize of output 20 [2023-04-01 19:42:05,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 19:42:05,660 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 6 proven. 120 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 19:42:05,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:42:11,455 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2023-04-01 19:42:11,458 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 134 treesize of output 126 [2023-04-01 19:42:11,996 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 8 proven. 109 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 19:42:11,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499179082] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:42:11,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:42:11,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 23] total 68 [2023-04-01 19:42:11,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870575511] [2023-04-01 19:42:11,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:42:11,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-04-01 19:42:11,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:42:11,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-04-01 19:42:11,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=4294, Unknown=5, NotChecked=0, Total=4556 [2023-04-01 19:42:12,000 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 68 states, 65 states have (on average 2.0153846153846153) internal successors, (131), 65 states have internal predecessors, (131), 16 states have call successors, (18), 5 states have call predecessors, (18), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-04-01 19:42:14,806 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 19:42:16,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:42:19,017 WARN L539 Checker$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 19:42:20,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:42:20,678 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2023-04-01 19:42:20,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-04-01 19:42:20,678 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 65 states have (on average 2.0153846153846153) internal successors, (131), 65 states have internal predecessors, (131), 16 states have call successors, (18), 5 states have call predecessors, (18), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 67 [2023-04-01 19:42:20,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:42:20,679 INFO L225 Difference]: With dead ends: 90 [2023-04-01 19:42:20,679 INFO L226 Difference]: Without dead ends: 88 [2023-04-01 19:42:20,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 96 SyntacticMatches, 7 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2429 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=618, Invalid=8689, Unknown=5, NotChecked=0, Total=9312 [2023-04-01 19:42:20,681 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 110 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 1833 mSolverCounterSat, 44 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 1881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1833 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2023-04-01 19:42:20,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 148 Invalid, 1881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1833 Invalid, 4 Unknown, 0 Unchecked, 7.5s Time] [2023-04-01 19:42:20,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-04-01 19:42:20,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2023-04-01 19:42:20,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 71 states have internal predecessors, (75), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 19:42:20,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 90 transitions. [2023-04-01 19:42:20,696 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 90 transitions. Word has length 67 [2023-04-01 19:42:20,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:42:20,697 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 90 transitions. [2023-04-01 19:42:20,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 65 states have (on average 2.0153846153846153) internal successors, (131), 65 states have internal predecessors, (131), 16 states have call successors, (18), 5 states have call predecessors, (18), 3 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-04-01 19:42:20,697 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 90 transitions. [2023-04-01 19:42:20,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-04-01 19:42:20,698 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:42:20,698 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:42:20,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-04-01 19:42:20,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-04-01 19:42:20,904 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:42:20,904 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:42:20,904 INFO L85 PathProgramCache]: Analyzing trace with hash 944331088, now seen corresponding path program 10 times [2023-04-01 19:42:20,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:42:20,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702327257] [2023-04-01 19:42:20,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:42:20,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:42:20,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:21,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:42:21,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:21,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-04-01 19:42:21,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:21,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-04-01 19:42:21,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:21,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-04-01 19:42:21,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:21,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-04-01 19:42:21,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:21,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2023-04-01 19:42:21,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:42:21,734 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 10 proven. 127 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-04-01 19:42:21,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:42:21,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702327257] [2023-04-01 19:42:21,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702327257] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:42:21,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490130121] [2023-04-01 19:42:21,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 19:42:21,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:42:21,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:42:21,736 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 19:42:21,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-04-01 19:42:21,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 19:42:21,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:42:21,893 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 37 conjunts are in the unsatisfiable core [2023-04-01 19:42:21,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:42:22,043 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-04-01 19:42:22,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 31 [2023-04-01 19:42:30,509 WARN L861 $PredicateComparison]: unable to prove that (exists ((|v_main_~#a~0.offset_BEFORE_CALL_31| Int) (v_main_~i~0_106 Int) (|v_main_~#a~0.base_BEFORE_CALL_31| Int)) (and (<= v_main_~i~0_106 6) (let ((.cse0 (select |c_#memory_int| |v_main_~#a~0.base_BEFORE_CALL_31|)) (.cse1 (* 4 v_main_~i~0_106))) (<= (+ (select .cse0 (+ |v_main_~#a~0.offset_BEFORE_CALL_31| (- 4) .cse1)) v_main_~i~0_106) (+ (select .cse0 (+ |v_main_~#a~0.offset_BEFORE_CALL_31| .cse1)) 1))))) is different from true [2023-04-01 19:42:38,722 WARN L861 $PredicateComparison]: unable to prove that (and (exists ((|v_main_~#a~0.offset_BEFORE_CALL_31| Int) (v_main_~i~0_106 Int) (|v_main_~#a~0.base_BEFORE_CALL_31| Int)) (and (<= v_main_~i~0_106 6) (let ((.cse0 (select |c_#memory_int| |v_main_~#a~0.base_BEFORE_CALL_31|)) (.cse1 (* 4 v_main_~i~0_106))) (<= (+ (select .cse0 (+ |v_main_~#a~0.offset_BEFORE_CALL_31| (- 4) .cse1)) v_main_~i~0_106) (+ (select .cse0 (+ |v_main_~#a~0.offset_BEFORE_CALL_31| .cse1)) 1))))) (exists ((v_main_~i~0_107 Int) (|v_main_~#a~0.offset_BEFORE_CALL_32| Int) (|v_main_~#a~0.base_BEFORE_CALL_32| Int)) (and (<= v_main_~i~0_107 6) (let ((.cse2 (select |c_#memory_int| |v_main_~#a~0.base_BEFORE_CALL_32|)) (.cse3 (* 4 v_main_~i~0_107))) (<= (+ (select .cse2 (+ .cse3 |v_main_~#a~0.offset_BEFORE_CALL_32| (- 4))) v_main_~i~0_107) (+ (select .cse2 (+ .cse3 |v_main_~#a~0.offset_BEFORE_CALL_32|)) 1)))))) is different from true [2023-04-01 19:42:42,955 WARN L861 $PredicateComparison]: unable to prove that (and (exists ((|v_main_~#a~0.offset_BEFORE_CALL_31| Int) (v_main_~i~0_106 Int) (|v_main_~#a~0.base_BEFORE_CALL_31| Int)) (and (<= v_main_~i~0_106 6) (let ((.cse0 (select |c_#memory_int| |v_main_~#a~0.base_BEFORE_CALL_31|)) (.cse1 (* 4 v_main_~i~0_106))) (<= (+ (select .cse0 (+ |v_main_~#a~0.offset_BEFORE_CALL_31| (- 4) .cse1)) v_main_~i~0_106) (+ (select .cse0 (+ |v_main_~#a~0.offset_BEFORE_CALL_31| .cse1)) 1))))) (exists ((|v_main_~#a~0.offset_BEFORE_CALL_33| Int) (|v_main_~#a~0.base_BEFORE_CALL_33| Int) (v_main_~i~0_107 Int)) (and (<= v_main_~i~0_107 6) (let ((.cse2 (select |c_#memory_int| |v_main_~#a~0.base_BEFORE_CALL_33|)) (.cse3 (* 4 v_main_~i~0_107))) (<= (+ (select .cse2 (+ .cse3 |v_main_~#a~0.offset_BEFORE_CALL_33| (- 4))) v_main_~i~0_107) (+ (select .cse2 (+ .cse3 |v_main_~#a~0.offset_BEFORE_CALL_33|)) 1)))))) is different from true [2023-04-01 19:42:47,188 WARN L861 $PredicateComparison]: unable to prove that (and (exists ((|v_main_~#a~0.offset_BEFORE_CALL_31| Int) (v_main_~i~0_106 Int) (|v_main_~#a~0.base_BEFORE_CALL_31| Int)) (and (<= v_main_~i~0_106 6) (let ((.cse0 (select |c_#memory_int| |v_main_~#a~0.base_BEFORE_CALL_31|)) (.cse1 (* 4 v_main_~i~0_106))) (<= (+ (select .cse0 (+ |v_main_~#a~0.offset_BEFORE_CALL_31| (- 4) .cse1)) v_main_~i~0_106) (+ (select .cse0 (+ |v_main_~#a~0.offset_BEFORE_CALL_31| .cse1)) 1))))) (exists ((|v_main_~#a~0.offset_BEFORE_CALL_34| Int) (|v_main_~#a~0.base_BEFORE_CALL_34| Int) (v_main_~i~0_107 Int)) (and (<= v_main_~i~0_107 6) (let ((.cse2 (select |c_#memory_int| |v_main_~#a~0.base_BEFORE_CALL_34|)) (.cse3 (* 4 v_main_~i~0_107))) (<= (+ (select .cse2 (+ .cse3 |v_main_~#a~0.offset_BEFORE_CALL_34| (- 4))) v_main_~i~0_107) (+ (select .cse2 (+ .cse3 |v_main_~#a~0.offset_BEFORE_CALL_34|)) 1)))))) is different from true [2023-04-01 19:42:53,580 WARN L861 $PredicateComparison]: unable to prove that (and (exists ((|v_main_~#a~0.offset_BEFORE_CALL_31| Int) (v_main_~i~0_106 Int) (|v_main_~#a~0.base_BEFORE_CALL_31| Int)) (and (<= v_main_~i~0_106 6) (let ((.cse0 (select |c_#memory_int| |v_main_~#a~0.base_BEFORE_CALL_31|)) (.cse1 (* 4 v_main_~i~0_106))) (<= (+ (select .cse0 (+ |v_main_~#a~0.offset_BEFORE_CALL_31| (- 4) .cse1)) v_main_~i~0_106) (+ (select .cse0 (+ |v_main_~#a~0.offset_BEFORE_CALL_31| .cse1)) 1))))) (exists ((|v_main_~#a~0.offset_BEFORE_CALL_35| Int) (|v_main_~#a~0.base_BEFORE_CALL_35| Int) (v_main_~i~0_107 Int)) (and (<= v_main_~i~0_107 6) (let ((.cse2 (select |c_#memory_int| |v_main_~#a~0.base_BEFORE_CALL_35|)) (.cse3 (* 4 v_main_~i~0_107))) (<= (+ (select .cse2 (+ .cse3 |v_main_~#a~0.offset_BEFORE_CALL_35| (- 4))) v_main_~i~0_107) (+ (select .cse2 (+ .cse3 |v_main_~#a~0.offset_BEFORE_CALL_35|)) 1)))))) is different from true [2023-04-01 19:43:06,114 INFO L321 Elim1Store]: treesize reduction 112, result has 44.3 percent of original size [2023-04-01 19:43:06,114 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 72 treesize of output 109 [2023-04-01 19:43:08,343 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 45 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 49 not checked. [2023-04-01 19:43:08,343 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:43:08,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490130121] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:43:08,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 19:43:08,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 31] total 56 [2023-04-01 19:43:08,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538619318] [2023-04-01 19:43:08,765 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 19:43:08,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-04-01 19:43:08,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:43:08,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-04-01 19:43:08,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=3053, Unknown=14, NotChecked=580, Total=3906 [2023-04-01 19:43:08,767 INFO L87 Difference]: Start difference. First operand 86 states and 90 transitions. Second operand has 56 states, 53 states have (on average 2.0377358490566038) internal successors, (108), 52 states have internal predecessors, (108), 13 states have call successors, (15), 9 states have call predecessors, (15), 6 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-04-01 19:43:15,893 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 19:43:19,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:43:56,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]