/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/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/array-industry-pattern/array_ptr_partial_init.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 08:47:38,080 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 08:47:38,082 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 08:47:38,125 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 08:47:38,144 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 08:47:38,146 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 08:47:38,146 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 08:47:38,147 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 08:47:38,148 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 08:47:38,148 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 08:47:38,149 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 08:47:38,151 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 08:47:38,152 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 08:47:38,155 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 08:47:38,157 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 08:47:38,158 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 08:47:38,170 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-01 08:47:38,173 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 08:47:38,173 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 08:47:38,175 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 08:47:38,175 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 08:47:38,176 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 08:47:38,176 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 08:47:38,176 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 08:47:38,176 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 08:47:38,177 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 08:47:38,177 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 08:47:38,178 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 08:47:38,179 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 08:47:38,209 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 08:47:38,210 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 08:47:38,210 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 08:47:38,210 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 08:47:38,211 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 08:47:38,211 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 08:47:38,211 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 08:47:38,211 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 08:47:38,211 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 08:47:38,211 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 08:47:38,212 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 08:47:38,212 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 08:47:38,212 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 08:47:38,213 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 08:47:38,213 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 08:47:38,213 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 08:47:38,213 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 08:47:38,213 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 08:47:38,214 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 08:47:38,214 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 08:47:38,214 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 08:47:38,214 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 08:47:38,214 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 08:47:38,214 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 08:47:38,214 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 08:47:38,215 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 08:47:38,215 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 08:47:38,215 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 08:47:38,215 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 08:47:38,215 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 08:47:38,215 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 08:47:38,216 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 08:47:38,216 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 08:47:38,216 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 08:47:38,216 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 08:47:38,216 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 08:47:38,216 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 08:47:38,216 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 08:47:38,217 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 08:47:38,217 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 08:47:38,217 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 08:47:38,217 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 08:47:38,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 08:47:38,480 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 08:47:38,482 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 08:47:38,483 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 08:47:38,484 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 08:47:38,485 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/array_ptr_partial_init.i [2023-04-01 08:47:39,643 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 08:47:39,846 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 08:47:39,846 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_ptr_partial_init.i [2023-04-01 08:47:39,851 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0d88dae8/59d0e0d2fe1a43dc8eb116a23419c548/FLAG6e3431da9 [2023-04-01 08:47:39,864 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0d88dae8/59d0e0d2fe1a43dc8eb116a23419c548 [2023-04-01 08:47:39,866 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 08:47:39,867 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 08:47:39,868 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 08:47:39,868 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 08:47:39,871 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 08:47:39,871 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:47:39" (1/1) ... [2023-04-01 08:47:39,872 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2907fe66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:47:39, skipping insertion in model container [2023-04-01 08:47:39,873 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 08:47:39" (1/1) ... [2023-04-01 08:47:39,878 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 08:47:39,890 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 08:47:40,010 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-industry-pattern/array_ptr_partial_init.i[952,965] [2023-04-01 08:47:40,020 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 08:47:40,029 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 08:47:40,039 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-industry-pattern/array_ptr_partial_init.i[952,965] [2023-04-01 08:47:40,043 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 08:47:40,055 INFO L208 MainTranslator]: Completed translation [2023-04-01 08:47:40,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:47:40 WrapperNode [2023-04-01 08:47:40,055 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 08:47:40,056 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 08:47:40,056 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 08:47:40,056 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 08:47:40,066 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:47:40" (1/1) ... [2023-04-01 08:47:40,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:47:40" (1/1) ... [2023-04-01 08:47:40,072 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:47:40" (1/1) ... [2023-04-01 08:47:40,072 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:47:40" (1/1) ... [2023-04-01 08:47:40,077 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:47:40" (1/1) ... [2023-04-01 08:47:40,081 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:47:40" (1/1) ... [2023-04-01 08:47:40,082 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:47:40" (1/1) ... [2023-04-01 08:47:40,083 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:47:40" (1/1) ... [2023-04-01 08:47:40,085 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 08:47:40,085 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 08:47:40,085 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 08:47:40,086 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 08:47:40,086 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:47:40" (1/1) ... [2023-04-01 08:47:40,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 08:47:40,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:47:40,118 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 08:47:40,124 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 08:47:40,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 08:47:40,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 08:47:40,151 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 08:47:40,151 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 08:47:40,151 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 08:47:40,151 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 08:47:40,151 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 08:47:40,151 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 08:47:40,151 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 08:47:40,151 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 08:47:40,152 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 08:47:40,152 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 08:47:40,152 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 08:47:40,152 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 08:47:40,152 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 08:47:40,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 08:47:40,152 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 08:47:40,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 08:47:40,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 08:47:40,152 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 08:47:40,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 08:47:40,153 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 08:47:40,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 08:47:40,222 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 08:47:40,224 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 08:47:40,413 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 08:47:40,444 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 08:47:40,445 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 08:47:40,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:47:40 BoogieIcfgContainer [2023-04-01 08:47:40,447 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 08:47:40,449 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 08:47:40,449 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 08:47:40,452 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 08:47:40,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 08:47:39" (1/3) ... [2023-04-01 08:47:40,452 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5474528c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:47:40, skipping insertion in model container [2023-04-01 08:47:40,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 08:47:40" (2/3) ... [2023-04-01 08:47:40,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5474528c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 08:47:40, skipping insertion in model container [2023-04-01 08:47:40,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 08:47:40" (3/3) ... [2023-04-01 08:47:40,454 INFO L112 eAbstractionObserver]: Analyzing ICFG array_ptr_partial_init.i [2023-04-01 08:47:40,470 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 08:47:40,471 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 08:47:40,534 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 08:47:40,540 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=FINITE_AUTOMATA, 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;@4e54b860, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 08:47:40,540 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 08:47:40,544 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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 08:47:40,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-04-01 08:47:40,550 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:47:40,551 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:47:40,551 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:47:40,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:47:40,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1628262345, now seen corresponding path program 1 times [2023-04-01 08:47:40,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:47:40,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137712013] [2023-04-01 08:47:40,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:47:40,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:47:40,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:47:40,802 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 08:47:40,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:47:40,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137712013] [2023-04-01 08:47:40,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137712013] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 08:47:40,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 08:47:40,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 08:47:40,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556582774] [2023-04-01 08:47:40,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 08:47:40,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 08:47:40,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:47:40,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 08:47:40,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 08:47:40,852 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 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 08:47:40,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:47:40,930 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2023-04-01 08:47:40,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 08:47:40,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 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 12 [2023-04-01 08:47:40,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:47:40,939 INFO L225 Difference]: With dead ends: 43 [2023-04-01 08:47:40,939 INFO L226 Difference]: Without dead ends: 27 [2023-04-01 08:47:40,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 08:47:40,945 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 10 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:47:40,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 23 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:47:40,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-04-01 08:47:40,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 18. [2023-04-01 08:47:40,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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 08:47:40,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2023-04-01 08:47:40,973 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 12 [2023-04-01 08:47:40,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:47:40,973 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2023-04-01 08:47:40,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 2 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 08:47:40,973 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2023-04-01 08:47:40,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 08:47:40,974 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:47:40,974 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:47:40,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 08:47:40,975 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:47:40,975 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:47:40,976 INFO L85 PathProgramCache]: Analyzing trace with hash -641909610, now seen corresponding path program 1 times [2023-04-01 08:47:40,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:47:40,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636363704] [2023-04-01 08:47:40,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:47:40,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:47:41,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:47:41,106 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 08:47:41,106 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:47:41,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636363704] [2023-04-01 08:47:41,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636363704] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:47:41,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756844601] [2023-04-01 08:47:41,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:47:41,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:47:41,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:47:41,114 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 08:47:41,116 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 08:47:41,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:47:41,232 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 08:47:41,237 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:47:41,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 08:47:41,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:47:41,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 08:47:41,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756844601] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:47:41,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [334592720] [2023-04-01 08:47:41,420 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 08:47:41,420 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:47:41,426 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:47:41,431 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:47:41,434 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:47:41,725 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 63 for LOIs [2023-04-01 08:47:42,347 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 68 for LOIs [2023-04-01 08:47:42,389 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 22 for LOIs [2023-04-01 08:47:42,400 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:47:43,168 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '203#(and (exists ((|v_old(#length)_BEFORE_CALL_1| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_1| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_1| (Array Int Int))) (and (= (select |v_old(#valid)_BEFORE_CALL_1| 3) 1) (not (= |v_old(#valid)_BEFORE_CALL_1| |v_old(#length)_BEFORE_CALL_1|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_1| 1) |v_old(#valid)_BEFORE_CALL_1|)) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_1| 1) 0)) (= (select |v_old(#valid)_BEFORE_CALL_1| 1) 1) (= (select |v_old(#length)_BEFORE_CALL_1| 2) 25) (= 2 (select |v_old(#length)_BEFORE_CALL_1| 1)) (= (select |v_old(#valid)_BEFORE_CALL_1| 2) 1) (= (select |v_old(#length)_BEFORE_CALL_1| 3) 400000) (not (= (select |v_old(#memory_int)_BEFORE_CALL_1| 1) |v_old(#length)_BEFORE_CALL_1|)) (= (select |v_old(#valid)_BEFORE_CALL_1| 0) 0) (= (select (select |v_old(#memory_int)_BEFORE_CALL_1| 1) 1) 0))) (= ~i~0 0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= (select (select |#memory_$Pointer$.offset| 3) 0) 0) (not (= |#StackHeapBarrier| 0)) (= 3 |~#a~0.base|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= (select (select |#memory_$Pointer$.base| 3) 0) 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:47:43,169 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:47:43,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:47:43,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-04-01 08:47:43,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551611089] [2023-04-01 08:47:43,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:47:43,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 08:47:43,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:47:43,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 08:47:43,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2023-04-01 08:47:43,172 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 2 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 08:47:43,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:47:43,225 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2023-04-01 08:47:43,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 08:47:43,225 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 2 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 08:47:43,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:47:43,226 INFO L225 Difference]: With dead ends: 52 [2023-04-01 08:47:43,226 INFO L226 Difference]: Without dead ends: 41 [2023-04-01 08:47:43,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2023-04-01 08:47:43,228 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 08:47:43,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 22 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 08:47:43,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-04-01 08:47:43,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 22. [2023-04-01 08:47:43,233 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 08:47:43,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2023-04-01 08:47:43,233 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 14 [2023-04-01 08:47:43,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:47:43,234 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2023-04-01 08:47:43,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 2 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 08:47:43,234 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2023-04-01 08:47:43,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-04-01 08:47:43,234 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:47:43,235 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:47:43,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 08:47:43,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:47:43,442 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:47:43,442 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:47:43,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1605080553, now seen corresponding path program 2 times [2023-04-01 08:47:43,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:47:43,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312853873] [2023-04-01 08:47:43,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:47:43,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:47:43,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:47:43,584 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 08:47:43,584 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:47:43,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312853873] [2023-04-01 08:47:43,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312853873] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:47:43,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337890966] [2023-04-01 08:47:43,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:47:43,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:47:43,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:47:43,586 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 08:47:43,589 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 08:47:43,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 08:47:43,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:47:43,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 08:47:43,670 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:47:43,689 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 08:47:43,689 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:47:43,721 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 08:47:43,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337890966] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:47:43,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1888726698] [2023-04-01 08:47:43,724 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 08:47:43,724 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:47:43,724 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:47:43,724 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:47:43,724 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:47:43,808 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 63 for LOIs [2023-04-01 08:47:44,112 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 68 for LOIs [2023-04-01 08:47:44,147 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 22 for LOIs [2023-04-01 08:47:44,156 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:47:44,776 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '446#(and (= ~i~0 0) (exists ((|v_old(#valid)_BEFORE_CALL_2| (Array Int Int)) (|v_old(#length)_BEFORE_CALL_2| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_2| (Array Int (Array Int Int)))) (and (= 2 (select |v_old(#length)_BEFORE_CALL_2| 1)) (= (select |v_old(#length)_BEFORE_CALL_2| 3) 400000) (= (select (select |v_old(#memory_int)_BEFORE_CALL_2| 1) 1) 0) (= (select |v_old(#length)_BEFORE_CALL_2| 2) 25) (= (select |v_old(#valid)_BEFORE_CALL_2| 0) 0) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_2| 1) 0)) (not (= |v_old(#length)_BEFORE_CALL_2| (select |v_old(#memory_int)_BEFORE_CALL_2| 1))) (not (= |v_old(#valid)_BEFORE_CALL_2| (select |v_old(#memory_int)_BEFORE_CALL_2| 1))) (not (= |v_old(#valid)_BEFORE_CALL_2| |v_old(#length)_BEFORE_CALL_2|)) (= (select |v_old(#valid)_BEFORE_CALL_2| 2) 1) (= (select |v_old(#valid)_BEFORE_CALL_2| 3) 1) (= (select |v_old(#valid)_BEFORE_CALL_2| 1) 1))) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= (select (select |#memory_$Pointer$.offset| 3) 0) 0) (not (= |#StackHeapBarrier| 0)) (= 3 |~#a~0.base|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= (select (select |#memory_$Pointer$.base| 3) 0) 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:47:44,777 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:47:44,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:47:44,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2023-04-01 08:47:44,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88711151] [2023-04-01 08:47:44,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:47:44,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 08:47:44,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:47:44,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 08:47:44,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2023-04-01 08:47:44,779 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 2 states have call successors, (3), 2 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 08:47:44,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:47:44,883 INFO L93 Difference]: Finished difference Result 108 states and 121 transitions. [2023-04-01 08:47:44,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 08:47:44,884 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 2 states have call successors, (3), 2 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 18 [2023-04-01 08:47:44,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:47:44,885 INFO L225 Difference]: With dead ends: 108 [2023-04-01 08:47:44,885 INFO L226 Difference]: Without dead ends: 96 [2023-04-01 08:47:44,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=161, Invalid=301, Unknown=0, NotChecked=0, Total=462 [2023-04-01 08:47:44,886 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 120 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:47:44,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 53 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:47:44,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-04-01 08:47:44,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 32. [2023-04-01 08:47:44,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 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 08:47:44,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2023-04-01 08:47:44,894 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 18 [2023-04-01 08:47:44,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:47:44,894 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2023-04-01 08:47:44,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 2 states have call successors, (3), 2 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 08:47:44,894 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2023-04-01 08:47:44,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 08:47:44,895 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:47:44,895 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:47:44,904 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 08:47:45,102 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,SelfDestructingSolverStorable2 [2023-04-01 08:47:45,102 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:47:45,103 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:47:45,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1220390327, now seen corresponding path program 3 times [2023-04-01 08:47:45,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:47:45,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050588936] [2023-04-01 08:47:45,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:47:45,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:47:45,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:47:45,418 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 08:47:45,418 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:47:45,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050588936] [2023-04-01 08:47:45,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050588936] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:47:45,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226645964] [2023-04-01 08:47:45,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 08:47:45,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:47:45,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:47:45,420 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 08:47:45,423 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 08:47:45,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 08:47:45,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 08:47:45,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 10 conjunts are in the unsatisfiable core [2023-04-01 08:47:45,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:47:45,591 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 08:47:45,592 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:47:45,751 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-01 08:47:45,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226645964] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:47:45,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1270654147] [2023-04-01 08:47:45,752 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 08:47:45,753 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:47:45,753 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:47:45,753 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:47:45,753 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:47:45,831 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 63 for LOIs [2023-04-01 08:47:46,111 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 68 for LOIs [2023-04-01 08:47:46,139 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 22 for LOIs [2023-04-01 08:47:46,148 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:47:46,764 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '861#(and (= ~i~0 0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= (select (select |#memory_$Pointer$.offset| 3) 0) 0) (not (= |#StackHeapBarrier| 0)) (= 3 |~#a~0.base|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (exists ((|v_old(#length)_BEFORE_CALL_3| (Array Int Int)) (|v_old(#valid)_BEFORE_CALL_3| (Array Int Int)) (|v_old(#memory_int)_BEFORE_CALL_3| (Array Int (Array Int Int)))) (and (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 1) 0) 48) (= (select (select |v_old(#memory_int)_BEFORE_CALL_3| 1) 1) 0) (= (select |v_old(#valid)_BEFORE_CALL_3| 0) 0) (not (= |v_old(#valid)_BEFORE_CALL_3| |v_old(#length)_BEFORE_CALL_3|)) (= 2 (select |v_old(#length)_BEFORE_CALL_3| 1)) (not (= |v_old(#length)_BEFORE_CALL_3| (select |v_old(#memory_int)_BEFORE_CALL_3| 1))) (= (select |v_old(#length)_BEFORE_CALL_3| 2) 25) (= (select |v_old(#length)_BEFORE_CALL_3| 3) 400000) (not (= |v_old(#valid)_BEFORE_CALL_3| (select |v_old(#memory_int)_BEFORE_CALL_3| 1))) (= (select |v_old(#valid)_BEFORE_CALL_3| 2) 1) (= (select |v_old(#valid)_BEFORE_CALL_3| 1) 1) (= (select |v_old(#valid)_BEFORE_CALL_3| 3) 1))) (= (select (select |#memory_$Pointer$.base| 3) 0) 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:47:46,765 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:47:46,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:47:46,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2023-04-01 08:47:46,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332349410] [2023-04-01 08:47:46,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:47:46,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-01 08:47:46,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:47:46,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-01 08:47:46,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=596, Unknown=0, NotChecked=0, Total=992 [2023-04-01 08:47:46,767 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 2 states have call successors, (3), 2 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 08:47:46,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:47:46,911 INFO L93 Difference]: Finished difference Result 143 states and 157 transitions. [2023-04-01 08:47:46,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-04-01 08:47:46,912 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 2 states have call successors, (3), 2 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 28 [2023-04-01 08:47:46,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:47:46,913 INFO L225 Difference]: With dead ends: 143 [2023-04-01 08:47:46,913 INFO L226 Difference]: Without dead ends: 125 [2023-04-01 08:47:46,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=396, Invalid=596, Unknown=0, NotChecked=0, Total=992 [2023-04-01 08:47:46,914 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 173 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 08:47:46,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 61 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 08:47:46,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-04-01 08:47:46,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 43. [2023-04-01 08:47:46,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 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 08:47:46,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2023-04-01 08:47:46,932 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 28 [2023-04-01 08:47:46,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:47:46,933 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2023-04-01 08:47:46,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 2 states have call successors, (3), 2 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 08:47:46,933 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2023-04-01 08:47:46,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-01 08:47:46,934 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:47:46,934 INFO L195 NwaCegarLoop]: trace histogram [18, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:47:46,948 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 08:47:47,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:47:47,145 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:47:47,145 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:47:47,146 INFO L85 PathProgramCache]: Analyzing trace with hash 375742050, now seen corresponding path program 4 times [2023-04-01 08:47:47,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:47:47,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173423323] [2023-04-01 08:47:47,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:47:47,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:47:47,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:47:47,733 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-01 08:47:47,733 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:47:47,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173423323] [2023-04-01 08:47:47,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173423323] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:47:47,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412276735] [2023-04-01 08:47:47,733 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 08:47:47,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:47:47,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:47:47,737 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 08:47:47,740 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 08:47:47,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:47:47,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-01 08:47:47,914 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 08:47:47,986 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-01 08:47:47,986 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 08:47:48,505 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-04-01 08:47:48,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412276735] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 08:47:48,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1806872700] [2023-04-01 08:47:48,506 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-04-01 08:47:48,506 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 08:47:48,507 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 08:47:48,507 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 08:47:48,507 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 08:47:48,575 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 63 for LOIs [2023-04-01 08:47:48,829 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 68 for LOIs [2023-04-01 08:47:48,875 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 22 for LOIs [2023-04-01 08:47:48,887 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 08:47:49,498 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1442#(and (exists ((|v_old(#memory_int)_BEFORE_CALL_4| (Array Int (Array Int Int))) (|v_old(#valid)_BEFORE_CALL_4| (Array Int Int)) (|v_old(#length)_BEFORE_CALL_4| (Array Int Int))) (and (= (select |v_old(#length)_BEFORE_CALL_4| 1) 2) (= (select |v_old(#length)_BEFORE_CALL_4| 2) 25) (= (select |v_old(#valid)_BEFORE_CALL_4| 1) 1) (= (select |v_old(#valid)_BEFORE_CALL_4| 0) 0) (not (= |v_old(#valid)_BEFORE_CALL_4| |v_old(#length)_BEFORE_CALL_4|)) (not (= (select |v_old(#memory_int)_BEFORE_CALL_4| 1) |v_old(#length)_BEFORE_CALL_4|)) (= (select (select |v_old(#memory_int)_BEFORE_CALL_4| 1) 1) 0) (= (select |v_old(#valid)_BEFORE_CALL_4| 3) 1) (= (select |v_old(#length)_BEFORE_CALL_4| 3) 400000) (not (= |v_old(#valid)_BEFORE_CALL_4| (select |v_old(#memory_int)_BEFORE_CALL_4| 1))) (= (select |v_old(#valid)_BEFORE_CALL_4| 2) 1) (= 48 (select (select |v_old(#memory_int)_BEFORE_CALL_4| 1) 0)))) (= ~i~0 0) (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= (select (select |#memory_$Pointer$.offset| 3) 0) 0) (not (= |#StackHeapBarrier| 0)) (= 3 |~#a~0.base|) (= |#NULL.offset| 0) (= |~#a~0.offset| 0) (= (select (select |#memory_$Pointer$.base| 3) 0) 0) (= |#NULL.base| 0))' at error location [2023-04-01 08:47:49,498 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 08:47:49,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 08:47:49,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 41 [2023-04-01 08:47:49,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319510345] [2023-04-01 08:47:49,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 08:47:49,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-04-01 08:47:49,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 08:47:49,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-04-01 08:47:49,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1166, Invalid=1486, Unknown=0, NotChecked=0, Total=2652 [2023-04-01 08:47:49,501 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 41 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 states have internal predecessors, (49), 2 states have call successors, (3), 2 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 08:47:49,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 08:47:49,936 INFO L93 Difference]: Finished difference Result 264 states and 297 transitions. [2023-04-01 08:47:49,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-04-01 08:47:49,937 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 states have internal predecessors, (49), 2 states have call successors, (3), 2 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 39 [2023-04-01 08:47:49,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 08:47:49,938 INFO L225 Difference]: With dead ends: 264 [2023-04-01 08:47:49,939 INFO L226 Difference]: Without dead ends: 245 [2023-04-01 08:47:49,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1166, Invalid=1486, Unknown=0, NotChecked=0, Total=2652 [2023-04-01 08:47:49,941 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 451 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 08:47:49,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 110 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 08:47:49,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2023-04-01 08:47:49,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 73. [2023-04-01 08:47:49,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 67 states have (on average 1.044776119402985) internal successors, (70), 67 states have internal predecessors, (70), 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 08:47:49,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2023-04-01 08:47:49,951 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 39 [2023-04-01 08:47:49,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 08:47:49,951 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2023-04-01 08:47:49,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 states have internal predecessors, (49), 2 states have call successors, (3), 2 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 08:47:49,952 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2023-04-01 08:47:49,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-04-01 08:47:49,953 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 08:47:49,953 INFO L195 NwaCegarLoop]: trace histogram [38, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 08:47:49,963 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 08:47:50,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:47:50,164 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 08:47:50,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 08:47:50,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1049369662, now seen corresponding path program 5 times [2023-04-01 08:47:50,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 08:47:50,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240814239] [2023-04-01 08:47:50,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 08:47:50,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 08:47:50,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 08:47:51,845 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-04-01 08:47:51,845 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 08:47:51,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240814239] [2023-04-01 08:47:51,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240814239] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 08:47:51,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518952419] [2023-04-01 08:47:51,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 08:47:51,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 08:47:51,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 08:47:51,847 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 08:47:51,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process