/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_ind3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 19:40:09,654 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 19:40:09,656 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 19:40:09,694 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 19:40:09,712 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 19:40:09,714 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 19:40:09,715 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 19:40:09,716 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 19:40:09,717 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 19:40:09,717 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 19:40:09,719 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 19:40:09,723 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 19:40:09,725 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 19:40:09,725 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 19:40:09,726 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 19:40:09,728 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 19:40:09,735 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 19:40:09,741 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 19:40:09,742 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 19:40:09,743 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 19:40:09,744 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 19:40:09,773 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 19:40:09,773 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 19:40:09,773 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 19:40:09,774 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 19:40:09,775 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 19:40:09,775 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 19:40:09,775 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 19:40:09,775 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 19:40:09,775 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 19:40:09,776 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 19:40:09,776 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 19:40:09,776 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 19:40:09,777 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 19:40:09,777 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 19:40:09,777 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 19:40:09,777 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 19:40:09,777 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 19:40:09,777 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 19:40:09,777 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 19:40:09,777 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 19:40:09,777 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 19:40:09,778 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 19:40:09,778 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 19:40:09,778 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 19:40:09,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 19:40:09,778 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 19:40:09,778 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 19:40:09,779 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 19:40:09,779 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 19:40:09,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 19:40:09,779 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 19:40:09,779 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 19:40:09,779 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 19:40:09,779 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 19:40:09,779 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 19:40:09,780 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 19:40:10,016 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 19:40:10,037 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 19:40:10,039 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 19:40:10,040 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 19:40:10,040 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 19:40:10,041 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c [2023-04-01 19:40:11,188 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 19:40:11,362 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 19:40:11,363 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_var_plus_ind3.c [2023-04-01 19:40:11,367 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/619a27d4c/2ab303a2671b42da8d007d590e6ef020/FLAG0f5954ec3 [2023-04-01 19:40:11,382 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/619a27d4c/2ab303a2671b42da8d007d590e6ef020 [2023-04-01 19:40:11,385 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 19:40:11,386 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 19:40:11,390 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 19:40:11,390 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 19:40:11,393 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 19:40:11,394 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 07:40:11" (1/1) ... [2023-04-01 19:40:11,395 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2945a9f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:40:11, skipping insertion in model container [2023-04-01 19:40:11,395 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 07:40:11" (1/1) ... [2023-04-01 19:40:11,401 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 19:40:11,414 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 19:40:11,533 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_ind3.c[415,428] [2023-04-01 19:40:11,545 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 19:40:11,553 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 19:40:11,562 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_ind3.c[415,428] [2023-04-01 19:40:11,566 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 19:40:11,575 INFO L208 MainTranslator]: Completed translation [2023-04-01 19:40:11,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:40:11 WrapperNode [2023-04-01 19:40:11,576 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 19:40:11,576 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 19:40:11,576 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 19:40:11,577 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 19:40:11,585 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:40:11" (1/1) ... [2023-04-01 19:40:11,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:40:11" (1/1) ... [2023-04-01 19:40:11,590 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:40:11" (1/1) ... [2023-04-01 19:40:11,590 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:40:11" (1/1) ... [2023-04-01 19:40:11,594 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:40:11" (1/1) ... [2023-04-01 19:40:11,597 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:40:11" (1/1) ... [2023-04-01 19:40:11,598 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:40:11" (1/1) ... [2023-04-01 19:40:11,599 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:40:11" (1/1) ... [2023-04-01 19:40:11,600 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 19:40:11,601 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 19:40:11,601 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 19:40:11,601 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 19:40:11,602 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:40:11" (1/1) ... [2023-04-01 19:40:11,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 19:40:11,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:40:11,627 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 19:40:11,629 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 19:40:11,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 19:40:11,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 19:40:11,674 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 19:40:11,674 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 19:40:11,674 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 19:40:11,675 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 19:40:11,675 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 19:40:11,676 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 19:40:11,676 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 19:40:11,676 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 19:40:11,679 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 19:40:11,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 19:40:11,679 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 19:40:11,679 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 19:40:11,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 19:40:11,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 19:40:11,680 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 19:40:11,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 19:40:11,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 19:40:11,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 19:40:11,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 19:40:11,749 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 19:40:11,752 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 19:40:11,920 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 19:40:11,924 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 19:40:11,924 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 19:40:11,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 07:40:11 BoogieIcfgContainer [2023-04-01 19:40:11,926 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 19:40:11,928 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 19:40:11,928 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 19:40:11,930 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 19:40:11,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 07:40:11" (1/3) ... [2023-04-01 19:40:11,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f30bef8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 07:40:11, skipping insertion in model container [2023-04-01 19:40:11,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:40:11" (2/3) ... [2023-04-01 19:40:11,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f30bef8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 07:40:11, skipping insertion in model container [2023-04-01 19:40:11,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 07:40:11" (3/3) ... [2023-04-01 19:40:11,932 INFO L112 eAbstractionObserver]: Analyzing ICFG array_init_var_plus_ind3.c [2023-04-01 19:40:11,947 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 19:40:11,948 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 19:40:12,015 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 19:40:12,021 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;@25f16d77, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 19:40:12,021 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 19:40:12,025 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 19:40:12,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-01 19:40:12,031 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:40:12,032 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:40:12,032 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:40:12,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:40:12,037 INFO L85 PathProgramCache]: Analyzing trace with hash 525097511, now seen corresponding path program 1 times [2023-04-01 19:40:12,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:40:12,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313458016] [2023-04-01 19:40:12,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:40:12,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:40:12,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:12,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:40:12,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:12,336 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 19:40:12,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:40:12,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313458016] [2023-04-01 19:40:12,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313458016] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:40:12,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 19:40:12,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 19:40:12,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651687813] [2023-04-01 19:40:12,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:40:12,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 19:40:12,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:40:12,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 19:40:12,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 19:40:12,368 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 19:40:12,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:40:12,540 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2023-04-01 19:40:12,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 19:40:12,542 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 19:40:12,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:40:12,548 INFO L225 Difference]: With dead ends: 52 [2023-04-01 19:40:12,548 INFO L226 Difference]: Without dead ends: 28 [2023-04-01 19:40:12,551 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 19:40:12,556 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 19:40:12,557 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 19:40:12,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-01 19:40:12,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2023-04-01 19:40:12,587 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 19:40:12,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-04-01 19:40:12,589 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 13 [2023-04-01 19:40:12,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:40:12,590 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-04-01 19:40:12,590 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 19:40:12,590 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-04-01 19:40:12,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 19:40:12,591 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:40:12,591 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:40:12,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 19:40:12,592 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:40:12,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:40:12,592 INFO L85 PathProgramCache]: Analyzing trace with hash -474007766, now seen corresponding path program 1 times [2023-04-01 19:40:12,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:40:12,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170264348] [2023-04-01 19:40:12,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:40:12,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:40:12,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:12,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:40:12,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:12,714 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 19:40:12,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:40:12,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170264348] [2023-04-01 19:40:12,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170264348] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 19:40:12,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 19:40:12,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 19:40:12,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689953592] [2023-04-01 19:40:12,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 19:40:12,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 19:40:12,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:40:12,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 19:40:12,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 19:40:12,718 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 19:40:12,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:40:12,826 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2023-04-01 19:40:12,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 19:40:12,827 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 19:40:12,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:40:12,829 INFO L225 Difference]: With dead ends: 35 [2023-04-01 19:40:12,830 INFO L226 Difference]: Without dead ends: 23 [2023-04-01 19:40:12,833 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 19:40:12,834 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 22 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:40:12,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 12 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:40:12,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-01 19:40:12,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2023-04-01 19:40:12,839 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 19:40:12,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2023-04-01 19:40:12,840 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 14 [2023-04-01 19:40:12,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:40:12,841 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2023-04-01 19:40:12,841 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 19:40:12,841 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2023-04-01 19:40:12,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-01 19:40:12,841 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:40:12,842 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:40:12,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 19:40:12,842 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:40:12,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:40:12,843 INFO L85 PathProgramCache]: Analyzing trace with hash -400894909, now seen corresponding path program 1 times [2023-04-01 19:40:12,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:40:12,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143406641] [2023-04-01 19:40:12,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:40:12,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:40:12,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:12,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:40:12,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:12,946 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 19:40:12,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:40:12,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143406641] [2023-04-01 19:40:12,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143406641] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:40:12,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175103911] [2023-04-01 19:40:12,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:40:12,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:40:12,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:40:12,953 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 19:40:12,976 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 19:40:13,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:13,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 19:40:13,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:40:13,127 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 19:40:13,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:40:13,198 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 19:40:13,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175103911] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:40:13,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:40:13,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2023-04-01 19:40:13,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721040643] [2023-04-01 19:40:13,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:40:13,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 19:40:13,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:40:13,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 19:40:13,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-04-01 19:40:13,208 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 19:40:13,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:40:13,421 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2023-04-01 19:40:13,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 19:40:13,421 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 19:40:13,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:40:13,423 INFO L225 Difference]: With dead ends: 53 [2023-04-01 19:40:13,424 INFO L226 Difference]: Without dead ends: 40 [2023-04-01 19:40:13,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2023-04-01 19:40:13,428 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 108 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:40:13,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 23 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:40:13,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-04-01 19:40:13,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2023-04-01 19:40:13,448 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 19:40:13,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2023-04-01 19:40:13,449 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 16 [2023-04-01 19:40:13,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:40:13,449 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2023-04-01 19:40:13,449 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 19:40:13,450 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2023-04-01 19:40:13,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 19:40:13,450 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:40:13,451 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:40:13,460 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 19:40:13,651 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 19:40:13,652 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:40:13,652 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:40:13,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1622405974, now seen corresponding path program 1 times [2023-04-01 19:40:13,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:40:13,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109947754] [2023-04-01 19:40:13,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:40:13,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:40:13,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:13,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:40:13,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:13,799 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 19:40:13,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:40:13,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109947754] [2023-04-01 19:40:13,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109947754] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:40:13,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279101260] [2023-04-01 19:40:13,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:40:13,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:40:13,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:40:13,802 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 19:40:13,805 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 19:40:13,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:13,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 19:40:13,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:40:13,946 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 19:40:13,946 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:40:14,000 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 19:40:14,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279101260] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:40:14,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:40:14,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2023-04-01 19:40:14,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175782090] [2023-04-01 19:40:14,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:40:14,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 19:40:14,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:40:14,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 19:40:14,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2023-04-01 19:40:14,002 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:40:14,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:40:14,225 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2023-04-01 19:40:14,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 19:40:14,225 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 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 19:40:14,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:40:14,226 INFO L225 Difference]: With dead ends: 51 [2023-04-01 19:40:14,226 INFO L226 Difference]: Without dead ends: 35 [2023-04-01 19:40:14,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2023-04-01 19:40:14,230 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 44 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:40:14,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 27 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:40:14,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-04-01 19:40:14,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2023-04-01 19:40:14,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 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 19:40:14,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2023-04-01 19:40:14,239 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 20 [2023-04-01 19:40:14,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:40:14,239 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2023-04-01 19:40:14,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:40:14,239 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2023-04-01 19:40:14,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 19:40:14,240 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:40:14,240 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:40:14,250 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 19:40:14,450 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 19:40:14,450 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:40:14,451 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:40:14,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1978113859, now seen corresponding path program 2 times [2023-04-01 19:40:14,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:40:14,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238957711] [2023-04-01 19:40:14,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:40:14,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:40:14,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:14,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:40:14,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:14,603 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:40:14,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:40:14,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238957711] [2023-04-01 19:40:14,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238957711] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:40:14,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536806357] [2023-04-01 19:40:14,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 19:40:14,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:40:14,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:40:14,605 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 19:40:14,626 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 19:40:14,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 19:40:14,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:40:14,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 19:40:14,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:40:14,806 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:40:14,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:40:14,925 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:40:14,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536806357] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:40:14,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:40:14,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-04-01 19:40:14,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149908707] [2023-04-01 19:40:14,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:40:14,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-01 19:40:14,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:40:14,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-01 19:40:14,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=305, Unknown=0, NotChecked=0, Total=506 [2023-04-01 19:40:14,929 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 21 states have internal predecessors, (61), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 19:40:15,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:40:15,278 INFO L93 Difference]: Finished difference Result 100 states and 122 transitions. [2023-04-01 19:40:15,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-01 19:40:15,280 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 21 states have internal predecessors, (61), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2023-04-01 19:40:15,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:40:15,284 INFO L225 Difference]: With dead ends: 100 [2023-04-01 19:40:15,284 INFO L226 Difference]: Without dead ends: 89 [2023-04-01 19:40:15,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=443, Invalid=817, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 19:40:15,285 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 234 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:40:15,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 16 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:40:15,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-04-01 19:40:15,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 54. [2023-04-01 19:40:15,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 48 states have (on average 1.1875) internal successors, (57), 48 states have internal predecessors, (57), 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 19:40:15,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2023-04-01 19:40:15,304 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 28 [2023-04-01 19:40:15,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:40:15,305 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2023-04-01 19:40:15,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 21 states have internal predecessors, (61), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 19:40:15,305 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2023-04-01 19:40:15,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 19:40:15,306 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:40:15,306 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:40:15,319 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 19:40:15,513 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 19:40:15,513 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:40:15,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:40:15,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1619826062, now seen corresponding path program 2 times [2023-04-01 19:40:15,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:40:15,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553572938] [2023-04-01 19:40:15,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:40:15,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:40:15,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:15,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:40:15,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:15,986 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:40:15,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:40:15,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553572938] [2023-04-01 19:40:15,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553572938] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:40:15,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235148366] [2023-04-01 19:40:15,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 19:40:15,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:40:15,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:40:15,999 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 19:40:16,023 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 19:40:16,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 19:40:16,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:40:16,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 29 conjunts are in the unsatisfiable core [2023-04-01 19:40:16,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:40:16,299 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 11 treesize of output 7 [2023-04-01 19:40:16,361 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 17 treesize of output 9 [2023-04-01 19:40:16,402 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:40:16,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:40:16,484 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 16 treesize of output 14 [2023-04-01 19:40:16,489 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 20 treesize of output 16 [2023-04-01 19:40:16,730 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:40:16,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235148366] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:40:16,730 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:40:16,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 40 [2023-04-01 19:40:16,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957089791] [2023-04-01 19:40:16,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:40:16,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-04-01 19:40:16,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:40:16,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-04-01 19:40:16,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1422, Unknown=0, NotChecked=0, Total=1560 [2023-04-01 19:40:16,734 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 40 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 37 states have internal predecessors, (68), 3 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 19:40:17,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:40:17,319 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2023-04-01 19:40:17,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-01 19:40:17,320 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 37 states have internal predecessors, (68), 3 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 29 [2023-04-01 19:40:17,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:40:17,322 INFO L225 Difference]: With dead ends: 69 [2023-04-01 19:40:17,322 INFO L226 Difference]: Without dead ends: 67 [2023-04-01 19:40:17,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=260, Invalid=2710, Unknown=0, NotChecked=0, Total=2970 [2023-04-01 19:40:17,326 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 64 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 19:40:17,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 103 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 19:40:17,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-04-01 19:40:17,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2023-04-01 19:40:17,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 53 states have (on average 1.169811320754717) internal successors, (62), 54 states have internal predecessors, (62), 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 19:40:17,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2023-04-01 19:40:17,346 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 29 [2023-04-01 19:40:17,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:40:17,346 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2023-04-01 19:40:17,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 1.7894736842105263) internal successors, (68), 37 states have internal predecessors, (68), 3 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 19:40:17,347 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2023-04-01 19:40:17,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 19:40:17,347 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:40:17,347 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:40:17,357 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 19:40:17,553 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 19:40:17,553 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:40:17,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:40:17,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1816438870, now seen corresponding path program 3 times [2023-04-01 19:40:17,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:40:17,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213395373] [2023-04-01 19:40:17,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:40:17,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:40:17,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:18,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:40:18,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:18,004 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:40:18,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:40:18,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213395373] [2023-04-01 19:40:18,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213395373] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:40:18,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829407528] [2023-04-01 19:40:18,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 19:40:18,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:40:18,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:40:18,005 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 19:40:18,008 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 19:40:18,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-04-01 19:40:18,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:40:18,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 30 conjunts are in the unsatisfiable core [2023-04-01 19:40:18,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:40:18,173 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 19:40:18,277 INFO L321 Elim1Store]: treesize reduction 21, result has 34.4 percent of original size [2023-04-01 19:40:18,277 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 29 treesize of output 28 [2023-04-01 19:40:18,342 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 21 treesize of output 9 [2023-04-01 19:40:18,394 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:40:18,395 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:40:18,604 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 23 treesize of output 21 [2023-04-01 19:40:18,609 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 46 treesize of output 42 [2023-04-01 19:40:18,883 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:40:18,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829407528] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:40:18,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:40:18,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 36 [2023-04-01 19:40:18,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602359366] [2023-04-01 19:40:18,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:40:18,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-04-01 19:40:18,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:40:18,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-04-01 19:40:18,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1147, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 19:40:18,885 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand has 36 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 33 states have internal predecessors, (63), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:40:19,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:40:19,498 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2023-04-01 19:40:19,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-04-01 19:40:19,499 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 33 states have internal predecessors, (63), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2023-04-01 19:40:19,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:40:19,501 INFO L225 Difference]: With dead ends: 71 [2023-04-01 19:40:19,501 INFO L226 Difference]: Without dead ends: 69 [2023-04-01 19:40:19,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=232, Invalid=2318, Unknown=0, NotChecked=0, Total=2550 [2023-04-01 19:40:19,503 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 68 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 19:40:19,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 97 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 19:40:19,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-04-01 19:40:19,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2023-04-01 19:40:19,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 52 states have (on average 1.1730769230769231) internal successors, (61), 53 states have internal predecessors, (61), 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 19:40:19,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2023-04-01 19:40:19,513 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 32 [2023-04-01 19:40:19,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:40:19,513 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2023-04-01 19:40:19,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 33 states have internal predecessors, (63), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 19:40:19,514 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2023-04-01 19:40:19,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-04-01 19:40:19,514 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:40:19,515 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:40:19,523 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 19:40:19,720 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 19:40:19,721 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:40:19,721 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:40:19,721 INFO L85 PathProgramCache]: Analyzing trace with hash 559827816, now seen corresponding path program 1 times [2023-04-01 19:40:19,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:40:19,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486561584] [2023-04-01 19:40:19,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:40:19,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:40:19,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:19,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:40:19,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:19,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-04-01 19:40:19,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:19,831 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:40:19,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:40:19,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486561584] [2023-04-01 19:40:19,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486561584] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:40:19,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075095721] [2023-04-01 19:40:19,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:40:19,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:40:19,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:40:19,833 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 19:40:19,835 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 19:40:19,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:19,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 19:40:19,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:40:19,959 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:40:19,959 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:40:20,045 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:40:20,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075095721] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:40:20,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:40:20,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 14 [2023-04-01 19:40:20,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998959943] [2023-04-01 19:40:20,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:40:20,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 19:40:20,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:40:20,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 19:40:20,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-04-01 19:40:20,048 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 19:40:20,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:40:20,233 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2023-04-01 19:40:20,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 19:40:20,234 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 37 [2023-04-01 19:40:20,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:40:20,235 INFO L225 Difference]: With dead ends: 76 [2023-04-01 19:40:20,235 INFO L226 Difference]: Without dead ends: 60 [2023-04-01 19:40:20,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 68 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2023-04-01 19:40:20,237 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 40 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 19:40:20,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 27 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 19:40:20,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-04-01 19:40:20,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-04-01 19:40:20,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 53 states have internal predecessors, (60), 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 19:40:20,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2023-04-01 19:40:20,252 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 37 [2023-04-01 19:40:20,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:40:20,252 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2023-04-01 19:40:20,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 19:40:20,253 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2023-04-01 19:40:20,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-04-01 19:40:20,259 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:40:20,259 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:40:20,271 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 19:40:20,465 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 19:40:20,466 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:40:20,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:40:20,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1512518020, now seen corresponding path program 2 times [2023-04-01 19:40:20,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:40:20,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236355119] [2023-04-01 19:40:20,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:40:20,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:40:20,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:20,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:40:20,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:20,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-04-01 19:40:20,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:20,983 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 2 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:40:20,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:40:20,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236355119] [2023-04-01 19:40:20,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236355119] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:40:20,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729592374] [2023-04-01 19:40:20,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 19:40:20,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:40:20,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:40:20,986 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 19:40:21,014 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 19:40:21,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 19:40:21,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:40:21,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 44 conjunts are in the unsatisfiable core [2023-04-01 19:40:21,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:40:21,310 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 19:40:21,388 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 19:40:21,843 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 19:40:21,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:40:21,846 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 19:40:21,846 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 28 treesize of output 17 [2023-04-01 19:40:21,924 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:40:21,924 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:40:22,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729592374] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:40:22,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 19:40:22,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 41 [2023-04-01 19:40:22,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192787156] [2023-04-01 19:40:22,079 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 19:40:22,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-04-01 19:40:22,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:40:22,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-04-01 19:40:22,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1727, Unknown=0, NotChecked=0, Total=1892 [2023-04-01 19:40:22,081 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand has 41 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 states have internal predecessors, (66), 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 19:40:23,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:40:23,005 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2023-04-01 19:40:23,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-01 19:40:23,005 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 states have internal predecessors, (66), 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 40 [2023-04-01 19:40:23,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:40:23,006 INFO L225 Difference]: With dead ends: 79 [2023-04-01 19:40:23,006 INFO L226 Difference]: Without dead ends: 60 [2023-04-01 19:40:23,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=355, Invalid=3677, Unknown=0, NotChecked=0, Total=4032 [2023-04-01 19:40:23,009 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 67 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 19:40:23,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 76 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1007 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 19:40:23,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-04-01 19:40:23,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-04-01 19:40:23,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 53 states have internal predecessors, (59), 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 19:40:23,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2023-04-01 19:40:23,035 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 40 [2023-04-01 19:40:23,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:40:23,035 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2023-04-01 19:40:23,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 38 states have (on average 1.736842105263158) internal successors, (66), 37 states have internal predecessors, (66), 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 19:40:23,036 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2023-04-01 19:40:23,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-04-01 19:40:23,036 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:40:23,036 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:40:23,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 19:40:23,242 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 19:40:23,242 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:40:23,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:40:23,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1962493416, now seen corresponding path program 3 times [2023-04-01 19:40:23,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:40:23,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526616450] [2023-04-01 19:40:23,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:40:23,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:40:23,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:23,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:40:23,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:23,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-04-01 19:40:23,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:23,766 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 2 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:40:23,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:40:23,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526616450] [2023-04-01 19:40:23,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526616450] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:40:23,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524193991] [2023-04-01 19:40:23,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 19:40:23,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:40:23,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:40:23,769 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 19:40:23,797 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 19:40:23,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-04-01 19:40:23,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:40:23,865 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 41 conjunts are in the unsatisfiable core [2023-04-01 19:40:23,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:40:23,975 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 19:40:24,050 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 25 treesize of output 24 [2023-04-01 19:40:24,125 INFO L321 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2023-04-01 19:40:24,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 35 [2023-04-01 19:40:26,537 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 19:40:26,538 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 36 treesize of output 12 [2023-04-01 19:40:26,627 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:40:26,627 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:40:28,087 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 63 treesize of output 59 [2023-04-01 19:40:28,094 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 19:40:28,094 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 303 treesize of output 291 [2023-04-01 19:40:28,165 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 1 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 19:40:28,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524193991] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:40:28,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:40:28,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 53 [2023-04-01 19:40:28,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348339158] [2023-04-01 19:40:28,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:40:28,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-04-01 19:40:28,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:40:28,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-04-01 19:40:28,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=2504, Unknown=1, NotChecked=0, Total=2756 [2023-04-01 19:40:28,168 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 53 states, 49 states have (on average 1.836734693877551) internal successors, (90), 49 states have internal predecessors, (90), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:40:30,172 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 19:40:32,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:40:34,308 WARN L539 Checker$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 19:40:36,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:40:38,496 WARN L539 Checker$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 19:40:40,593 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:40:44,649 WARN L539 Checker$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 19:40:48,692 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 19:40:53,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:40:53,517 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2023-04-01 19:40:53,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-04-01 19:40:53,517 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 49 states have (on average 1.836734693877551) internal successors, (90), 49 states have internal predecessors, (90), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 43 [2023-04-01 19:40:53,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:40:53,518 INFO L225 Difference]: With dead ends: 72 [2023-04-01 19:40:53,518 INFO L226 Difference]: Without dead ends: 70 [2023-04-01 19:40:53,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=578, Invalid=5269, Unknown=5, NotChecked=0, Total=5852 [2023-04-01 19:40:53,520 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 156 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 49 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.5s IncrementalHoareTripleChecker+Time [2023-04-01 19:40:53,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 84 Invalid, 1002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 945 Invalid, 8 Unknown, 0 Unchecked, 16.5s Time] [2023-04-01 19:40:53,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-04-01 19:40:53,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2023-04-01 19:40:53,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 58 states have (on average 1.1206896551724137) internal successors, (65), 59 states have internal predecessors, (65), 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 19:40:53,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 74 transitions. [2023-04-01 19:40:53,532 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 74 transitions. Word has length 43 [2023-04-01 19:40:53,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:40:53,533 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 74 transitions. [2023-04-01 19:40:53,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 49 states have (on average 1.836734693877551) internal successors, (90), 49 states have internal predecessors, (90), 6 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 19:40:53,533 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 74 transitions. [2023-04-01 19:40:53,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-04-01 19:40:53,534 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:40:53,535 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:40:53,551 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 19:40:53,742 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 19:40:53,743 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:40:53,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:40:53,743 INFO L85 PathProgramCache]: Analyzing trace with hash 908722626, now seen corresponding path program 4 times [2023-04-01 19:40:53,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:40:53,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059062739] [2023-04-01 19:40:53,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:40:53,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:40:53,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:54,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:40:54,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:54,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-04-01 19:40:54,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:54,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-04-01 19:40:54,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:54,262 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 8 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 19:40:54,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:40:54,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059062739] [2023-04-01 19:40:54,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059062739] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:40:54,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600615164] [2023-04-01 19:40:54,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 19:40:54,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:40:54,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:40:54,268 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 19:40:54,297 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 19:40:54,397 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 19:40:54,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:40:54,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 40 conjunts are in the unsatisfiable core [2023-04-01 19:40:54,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:40:54,704 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 19:40:55,212 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-04-01 19:40:55,213 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 25 treesize of output 12 [2023-04-01 19:40:55,261 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 6 proven. 86 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 19:40:55,262 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:40:55,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600615164] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:40:55,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 19:40:55,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 43 [2023-04-01 19:40:55,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921674554] [2023-04-01 19:40:55,376 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 19:40:55,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-04-01 19:40:55,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:40:55,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-04-01 19:40:55,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1900, Unknown=0, NotChecked=0, Total=2070 [2023-04-01 19:40:55,378 INFO L87 Difference]: Start difference. First operand 68 states and 74 transitions. Second operand has 43 states, 42 states have (on average 1.880952380952381) internal successors, (79), 40 states have internal predecessors, (79), 6 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 19:40:56,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:40:56,487 INFO L93 Difference]: Finished difference Result 95 states and 101 transitions. [2023-04-01 19:40:56,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-04-01 19:40:56,488 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.880952380952381) internal successors, (79), 40 states have internal predecessors, (79), 6 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 51 [2023-04-01 19:40:56,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:40:56,489 INFO L225 Difference]: With dead ends: 95 [2023-04-01 19:40:56,489 INFO L226 Difference]: Without dead ends: 68 [2023-04-01 19:40:56,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=407, Invalid=4563, Unknown=0, NotChecked=0, Total=4970 [2023-04-01 19:40:56,491 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 61 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 1148 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 19:40:56,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 70 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1148 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 19:40:56,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-04-01 19:40:56,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2023-04-01 19:40:56,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 58 states have (on average 1.103448275862069) internal successors, (64), 59 states have internal predecessors, (64), 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 19:40:56,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 73 transitions. [2023-04-01 19:40:56,502 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 73 transitions. Word has length 51 [2023-04-01 19:40:56,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:40:56,502 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 73 transitions. [2023-04-01 19:40:56,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.880952380952381) internal successors, (79), 40 states have internal predecessors, (79), 6 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 19:40:56,502 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 73 transitions. [2023-04-01 19:40:56,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-04-01 19:40:56,503 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:40:56,503 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:40:56,511 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 19:40:56,708 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 19:40:56,708 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:40:56,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:40:56,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1718093534, now seen corresponding path program 5 times [2023-04-01 19:40:56,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:40:56,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231059788] [2023-04-01 19:40:56,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:40:56,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:40:56,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:57,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:40:57,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:57,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-04-01 19:40:57,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:57,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-04-01 19:40:57,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:40:57,295 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 19:40:57,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:40:57,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231059788] [2023-04-01 19:40:57,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231059788] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:40:57,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394215309] [2023-04-01 19:40:57,296 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 19:40:57,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:40:57,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:40:57,297 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 19:40:57,324 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 19:40:57,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-04-01 19:40:57,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:40:57,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 47 conjunts are in the unsatisfiable core [2023-04-01 19:40:57,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:40:57,835 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 19:40:57,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 19:40:57,913 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 23 treesize of output 22 [2023-04-01 19:40:58,298 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 17 treesize of output 9 [2023-04-01 19:40:58,349 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 19:40:58,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:41:01,363 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 23 treesize of output 21 [2023-04-01 19:41:01,367 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 102 treesize of output 94 [2023-04-01 19:41:01,837 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 19:41:01,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394215309] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 19:41:01,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 19:41:01,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26, 23] total 66 [2023-04-01 19:41:01,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359964321] [2023-04-01 19:41:01,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 19:41:01,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-04-01 19:41:01,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:41:01,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-04-01 19:41:01,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=4029, Unknown=5, NotChecked=0, Total=4290 [2023-04-01 19:41:01,841 INFO L87 Difference]: Start difference. First operand 68 states and 73 transitions. Second operand has 66 states, 64 states have (on average 1.90625) internal successors, (122), 63 states have internal predecessors, (122), 9 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 19:41:03,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 19:41:03,105 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2023-04-01 19:41:03,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-04-01 19:41:03,106 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 64 states have (on average 1.90625) internal successors, (122), 63 states have internal predecessors, (122), 9 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 54 [2023-04-01 19:41:03,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 19:41:03,107 INFO L225 Difference]: With dead ends: 80 [2023-04-01 19:41:03,107 INFO L226 Difference]: Without dead ends: 78 [2023-04-01 19:41:03,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2231 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=542, Invalid=7825, Unknown=5, NotChecked=0, Total=8372 [2023-04-01 19:41:03,109 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 136 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 1453 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 1500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 19:41:03,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 148 Invalid, 1500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1453 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 19:41:03,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-04-01 19:41:03,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2023-04-01 19:41:03,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 64 states have (on average 1.09375) internal successors, (70), 65 states have internal predecessors, (70), 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 19:41:03,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2023-04-01 19:41:03,122 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 54 [2023-04-01 19:41:03,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 19:41:03,122 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2023-04-01 19:41:03,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 64 states have (on average 1.90625) internal successors, (122), 63 states have internal predecessors, (122), 9 states have call successors, (12), 5 states have call predecessors, (12), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 19:41:03,122 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2023-04-01 19:41:03,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-04-01 19:41:03,123 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 19:41:03,123 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 19:41:03,135 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 19:41:03,329 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 19:41:03,331 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 19:41:03,332 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 19:41:03,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1499763528, now seen corresponding path program 6 times [2023-04-01 19:41:03,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 19:41:03,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051343996] [2023-04-01 19:41:03,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 19:41:03,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 19:41:03,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:04,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 19:41:04,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:04,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2023-04-01 19:41:04,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:04,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-04-01 19:41:04,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:04,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-04-01 19:41:04,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 19:41:04,066 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 18 proven. 106 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 19:41:04,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 19:41:04,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051343996] [2023-04-01 19:41:04,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051343996] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:41:04,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659262415] [2023-04-01 19:41:04,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-01 19:41:04,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 19:41:04,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 19:41:04,071 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 19:41:04,094 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 19:41:04,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-04-01 19:41:04,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 19:41:04,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 36 conjunts are in the unsatisfiable core [2023-04-01 19:41:04,210 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 19:41:04,398 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 19:41:04,476 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 19:41:08,673 WARN L861 $PredicateComparison]: unable to prove that (exists ((|v_main_~#a~0.offset_BEFORE_CALL_10| Int) (|v_main_~#a~0.base_BEFORE_CALL_10| Int) (v_main_~i~0_115 Int)) (and (<= v_main_~i~0_115 7) (let ((.cse0 (select |c_#memory_int| |v_main_~#a~0.base_BEFORE_CALL_10|)) (.cse1 (* 4 v_main_~i~0_115))) (<= (+ (select .cse0 (+ |v_main_~#a~0.offset_BEFORE_CALL_10| .cse1)) v_main_~i~0_115) (+ (select .cse0 (+ |v_main_~#a~0.offset_BEFORE_CALL_10| (- 4) .cse1)) 1))))) is different from true [2023-04-01 19:41:16,899 WARN L861 $PredicateComparison]: unable to prove that (and (exists ((|v_main_~#a~0.offset_BEFORE_CALL_11| Int) (|v_main_~#a~0.base_BEFORE_CALL_11| Int) (v_main_~i~0_115 Int)) (and (<= v_main_~i~0_115 7) (let ((.cse0 (select |c_#memory_int| |v_main_~#a~0.base_BEFORE_CALL_11|)) (.cse1 (* 4 v_main_~i~0_115))) (<= (+ (select .cse0 (+ |v_main_~#a~0.offset_BEFORE_CALL_11| .cse1)) v_main_~i~0_115) (+ (select .cse0 (+ |v_main_~#a~0.offset_BEFORE_CALL_11| (- 4) .cse1)) 1))))) (exists ((|v_main_~#a~0.offset_BEFORE_CALL_10| Int) (|v_main_~#a~0.base_BEFORE_CALL_10| Int) (v_main_~i~0_116 Int)) (and (let ((.cse2 (select |c_#memory_int| |v_main_~#a~0.base_BEFORE_CALL_10|)) (.cse3 (* 4 v_main_~i~0_116))) (<= (+ (select .cse2 (+ |v_main_~#a~0.offset_BEFORE_CALL_10| .cse3)) v_main_~i~0_116) (+ 1 (select .cse2 (+ |v_main_~#a~0.offset_BEFORE_CALL_10| (- 4) .cse3))))) (<= v_main_~i~0_116 7)))) is different from true [2023-04-01 19:41:33,248 WARN L861 $PredicateComparison]: unable to prove that (and (exists ((|v_main_~#a~0.offset_BEFORE_CALL_10| Int) (|v_main_~#a~0.base_BEFORE_CALL_10| Int) (v_main_~i~0_116 Int)) (and (let ((.cse0 (select |c_#memory_int| |v_main_~#a~0.base_BEFORE_CALL_10|)) (.cse1 (* 4 v_main_~i~0_116))) (<= (+ (select .cse0 (+ |v_main_~#a~0.offset_BEFORE_CALL_10| .cse1)) v_main_~i~0_116) (+ 1 (select .cse0 (+ |v_main_~#a~0.offset_BEFORE_CALL_10| (- 4) .cse1))))) (<= v_main_~i~0_116 7))) (exists ((|v_main_~#a~0.offset_BEFORE_CALL_12| Int) (|v_main_~#a~0.base_BEFORE_CALL_12| Int) (v_main_~i~0_115 Int)) (and (<= v_main_~i~0_115 7) (let ((.cse2 (select |c_#memory_int| |v_main_~#a~0.base_BEFORE_CALL_12|)) (.cse3 (* 4 v_main_~i~0_115))) (<= (+ (select .cse2 (+ |v_main_~#a~0.offset_BEFORE_CALL_12| .cse3)) v_main_~i~0_115) (+ (select .cse2 (+ |v_main_~#a~0.offset_BEFORE_CALL_12| (- 4) .cse3)) 1)))))) is different from true [2023-04-01 19:41:47,640 INFO L321 Elim1Store]: treesize reduction 112, result has 44.3 percent of original size [2023-04-01 19:41:47,640 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 19:41:49,887 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 15 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 17 not checked. [2023-04-01 19:41:49,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 19:41:50,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659262415] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 19:41:50,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 19:41:50,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 29] total 53 [2023-04-01 19:41:50,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544097217] [2023-04-01 19:41:50,263 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 19:41:50,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-04-01 19:41:50,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 19:41:50,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-04-01 19:41:50,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=3006, Unknown=9, NotChecked=342, Total=3660 [2023-04-01 19:41:50,265 INFO L87 Difference]: Start difference. First operand 76 states and 81 transitions. Second operand has 53 states, 50 states have (on average 1.92) internal successors, (96), 49 states have internal predecessors, (96), 9 states have call successors, (11), 7 states have call predecessors, (11), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 19:41:51,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:41:59,226 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:42:37,642 WARN L539 Checker$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 19:42:41,701 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 19:43:32,483 WARN L223 SmtUtils]: Spent 8.02s on a formula simplification. DAG size of input: 54 DAG size of output: 42 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 19:43:44,578 WARN L223 SmtUtils]: Spent 8.04s on a formula simplification. DAG size of input: 57 DAG size of output: 33 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-01 19:44:22,910 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0]