/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 IntervalDomain -i ../sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 20:40:00,968 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 20:40:00,970 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 20:40:01,004 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 20:40:01,004 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 20:40:01,010 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 20:40:01,014 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 20:40:01,016 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 20:40:01,018 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 20:40:01,024 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 20:40:01,025 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 20:40:01,027 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 20:40:01,027 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 20:40:01,032 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 20:40:01,033 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 20:40:01,034 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 20:40:01,034 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 20:40:01,035 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 20:40:01,036 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 20:40:01,037 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 20:40:01,038 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 20:40:01,039 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 20:40:01,040 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 20:40:01,040 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 20:40:01,043 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-03-31 20:40:01,049 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 20:40:01,050 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 20:40:01,050 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 20:40:01,052 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 [2023-03-31 20:40:01,091 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 20:40:01,091 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 20:40:01,092 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 20:40:01,092 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 20:40:01,092 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 20:40:01,092 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 20:40:01,093 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 20:40:01,093 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 20:40:01,093 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 20:40:01,093 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 20:40:01,093 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 20:40:01,093 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 20:40:01,093 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 20:40:01,094 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 20:40:01,094 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 20:40:01,094 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 20:40:01,094 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 20:40:01,094 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 20:40:01,095 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 20:40:01,095 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 20:40:01,095 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 20:40:01,095 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 20:40:01,095 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 20:40:01,096 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 20:40:01,096 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 20:40:01,096 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 20:40:01,096 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 20:40:01,096 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 20:40:01,096 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 20:40:01,096 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 20:40:01,096 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 20:40:01,097 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 20:40:01,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:40:01,097 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 20:40:01,097 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 20:40:01,097 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 20:40:01,097 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 20:40:01,097 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 20:40:01,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 20:40:01,098 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 20:40:01,098 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 20:40:01,098 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 20:40:01,320 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 20:40:01,340 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 20:40:01,343 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 20:40:01,344 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 20:40:01,345 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 20:40:01,346 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c [2023-03-31 20:40:02,514 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 20:40:02,692 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 20:40:02,693 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_sentinel.i.v+cfa-reducer.c [2023-03-31 20:40:02,698 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/097e09578/8408f3fb03d2433e902bf1f9a8a65d24/FLAGa8505f8f7 [2023-03-31 20:40:02,714 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/097e09578/8408f3fb03d2433e902bf1f9a8a65d24 [2023-03-31 20:40:02,718 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 20:40:02,719 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 20:40:02,721 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 20:40:02,721 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 20:40:02,724 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 20:40:02,724 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:40:02" (1/1) ... [2023-03-31 20:40:02,725 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f144e34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:40:02, skipping insertion in model container [2023-03-31 20:40:02,725 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 08:40:02" (1/1) ... [2023-03-31 20:40:02,731 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 20:40:02,744 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 20:40:02,866 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-examples/standard_sentinel.i.v+cfa-reducer.c[991,1004] [2023-03-31 20:40:02,871 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:40:02,879 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 20:40:02,893 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-examples/standard_sentinel.i.v+cfa-reducer.c[991,1004] [2023-03-31 20:40:02,894 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 20:40:02,906 INFO L208 MainTranslator]: Completed translation [2023-03-31 20:40:02,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:40:02 WrapperNode [2023-03-31 20:40:02,906 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 20:40:02,907 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 20:40:02,908 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 20:40:02,908 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 20:40:02,917 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:40:02" (1/1) ... [2023-03-31 20:40:02,917 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:40:02" (1/1) ... [2023-03-31 20:40:02,924 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:40:02" (1/1) ... [2023-03-31 20:40:02,925 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:40:02" (1/1) ... [2023-03-31 20:40:02,935 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:40:02" (1/1) ... [2023-03-31 20:40:02,937 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:40:02" (1/1) ... [2023-03-31 20:40:02,938 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:40:02" (1/1) ... [2023-03-31 20:40:02,939 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:40:02" (1/1) ... [2023-03-31 20:40:02,941 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 20:40:02,942 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 20:40:02,942 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 20:40:02,942 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 20:40:02,943 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:40:02" (1/1) ... [2023-03-31 20:40:02,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 20:40:02,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:40:02,968 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) [2023-03-31 20:40:02,976 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 [2023-03-31 20:40:02,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 20:40:02,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 20:40:02,999 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 20:40:03,000 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 20:40:03,000 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 20:40:03,000 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 20:40:03,000 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 20:40:03,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 20:40:03,000 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 20:40:03,000 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 20:40:03,000 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 20:40:03,001 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 20:40:03,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 20:40:03,001 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 20:40:03,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 20:40:03,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 20:40:03,001 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 20:40:03,001 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 20:40:03,055 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 20:40:03,057 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 20:40:03,209 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 20:40:03,273 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 20:40:03,273 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 20:40:03,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:40:03 BoogieIcfgContainer [2023-03-31 20:40:03,275 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 20:40:03,277 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 20:40:03,277 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 20:40:03,280 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 20:40:03,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 08:40:02" (1/3) ... [2023-03-31 20:40:03,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36a1c2ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:40:03, skipping insertion in model container [2023-03-31 20:40:03,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 08:40:02" (2/3) ... [2023-03-31 20:40:03,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36a1c2ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 08:40:03, skipping insertion in model container [2023-03-31 20:40:03,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 08:40:03" (3/3) ... [2023-03-31 20:40:03,286 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_sentinel.i.v+cfa-reducer.c [2023-03-31 20:40:03,302 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 20:40:03,302 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 20:40:03,343 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 20:40:03,349 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;@b5c9139, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 20:40:03,349 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 20:40:03,353 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 20:40:03,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-03-31 20:40:03,359 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:40:03,360 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:40:03,361 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:40:03,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:40:03,371 INFO L85 PathProgramCache]: Analyzing trace with hash 174780321, now seen corresponding path program 1 times [2023-03-31 20:40:03,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:40:03,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921289340] [2023-03-31 20:40:03,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:40:03,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:40:03,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:40:03,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:40:03,572 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:40:03,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921289340] [2023-03-31 20:40:03,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921289340] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:40:03,573 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 20:40:03,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 20:40:03,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027768927] [2023-03-31 20:40:03,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:40:03,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 20:40:03,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:40:03,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 20:40:03,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 20:40:03,617 INFO L87 Difference]: Start difference. First operand has 17 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 12 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:40:03,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:40:03,655 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2023-03-31 20:40:03,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 20:40:03,657 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-03-31 20:40:03,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:40:03,663 INFO L225 Difference]: With dead ends: 29 [2023-03-31 20:40:03,663 INFO L226 Difference]: Without dead ends: 14 [2023-03-31 20:40:03,666 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 [2023-03-31 20:40:03,669 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:40:03,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:40:03,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-03-31 20:40:03,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-03-31 20:40:03,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:40:03,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2023-03-31 20:40:03,716 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2023-03-31 20:40:03,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:40:03,717 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2023-03-31 20:40:03,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:40:03,717 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2023-03-31 20:40:03,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-03-31 20:40:03,718 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:40:03,718 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:40:03,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 20:40:03,719 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:40:03,720 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:40:03,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1562780666, now seen corresponding path program 1 times [2023-03-31 20:40:03,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:40:03,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635839] [2023-03-31 20:40:03,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:40:03,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:40:03,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:40:03,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:40:03,818 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:40:03,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635839] [2023-03-31 20:40:03,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635839] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:40:03,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307120753] [2023-03-31 20:40:03,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:40:03,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:40:03,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:40:03,822 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) [2023-03-31 20:40:03,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 20:40:03,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:40:03,917 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 20:40:03,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:40:03,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:40:03,965 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:40:04,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 20:40:04,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307120753] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:40:04,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1571780850] [2023-03-31 20:40:04,036 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-03-31 20:40:04,036 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:40:04,041 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:40:04,046 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:40:04,047 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:40:04,232 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 23 for LOIs [2023-03-31 20:40:04,388 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-03-31 20:40:04,406 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:40:04,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1571780850] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 20:40:04,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:40:04,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [4, 4, 4] total 17 [2023-03-31 20:40:04,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738257923] [2023-03-31 20:40:04,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 20:40:04,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-31 20:40:04,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:40:04,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-31 20:40:04,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-03-31 20:40:04,835 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 12 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:40:05,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:40:05,685 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2023-03-31 20:40:05,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-31 20:40:05,686 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-03-31 20:40:05,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:40:05,686 INFO L225 Difference]: With dead ends: 19 [2023-03-31 20:40:05,686 INFO L226 Difference]: Without dead ends: 16 [2023-03-31 20:40:05,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2023-03-31 20:40:05,688 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 28 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:40:05,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 5 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:40:05,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-03-31 20:40:05,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-03-31 20:40:05,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:40:05,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2023-03-31 20:40:05,697 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 13 [2023-03-31 20:40:05,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:40:05,698 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2023-03-31 20:40:05,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:40:05,698 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2023-03-31 20:40:05,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-03-31 20:40:05,699 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:40:05,699 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:40:05,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 20:40:05,906 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 [2023-03-31 20:40:05,906 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:40:05,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:40:05,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1404245353, now seen corresponding path program 1 times [2023-03-31 20:40:05,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:40:05,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942590675] [2023-03-31 20:40:05,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:40:05,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:40:05,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:40:05,998 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 20:40:05,999 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:40:05,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942590675] [2023-03-31 20:40:05,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942590675] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:40:05,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269411569] [2023-03-31 20:40:05,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:40:05,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:40:05,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:40:06,001 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) [2023-03-31 20:40:06,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 20:40:06,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:40:06,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 20:40:06,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:40:06,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 20:40:06,057 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:40:06,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 20:40:06,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269411569] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:40:06,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1339894487] [2023-03-31 20:40:06,076 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-03-31 20:40:06,076 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:40:06,076 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:40:06,076 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:40:06,076 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:40:06,113 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 23 for LOIs [2023-03-31 20:40:06,218 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-03-31 20:40:06,225 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:40:06,606 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '334#(and (<= 0 (+ main_~main__marker~0 2147483648)) (<= 0 |main_~#main__a~0.base|) (= main_~__VERIFIER_assert__cond~0 0) (<= 100000 main_~i~0) (< main_~main__pos~0 main_~main__i~0) (<= main_~main__marker~0 2147483647) (= main_~__tmp_1~0 0) (= |old(~__return_60~0)| 0) (<= main_~main__pos~0 100000) (<= 0 main_~main__pos~0) (= |#NULL.offset| 0) (= |main_~#main__a~0.offset| 0) (= ~__return_60~0 0) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |#NULL.base| 0))' at error location [2023-03-31 20:40:06,606 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:40:06,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:40:06,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-03-31 20:40:06,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145786497] [2023-03-31 20:40:06,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:40:06,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 20:40:06,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:40:06,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 20:40:06,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2023-03-31 20:40:06,608 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:40:06,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:40:06,622 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2023-03-31 20:40:06,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 20:40:06,623 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-03-31 20:40:06,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:40:06,623 INFO L225 Difference]: With dead ends: 28 [2023-03-31 20:40:06,623 INFO L226 Difference]: Without dead ends: 19 [2023-03-31 20:40:06,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2023-03-31 20:40:06,625 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:40:06,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:40:06,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-03-31 20:40:06,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-03-31 20:40:06,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:40:06,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2023-03-31 20:40:06,632 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2023-03-31 20:40:06,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:40:06,632 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2023-03-31 20:40:06,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:40:06,633 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2023-03-31 20:40:06,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-03-31 20:40:06,633 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:40:06,633 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:40:06,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-03-31 20:40:06,839 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 [2023-03-31 20:40:06,839 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:40:06,839 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:40:06,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1124020348, now seen corresponding path program 2 times [2023-03-31 20:40:06,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:40:06,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543408061] [2023-03-31 20:40:06,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:40:06,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:40:06,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:40:06,991 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 20:40:06,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:40:06,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543408061] [2023-03-31 20:40:06,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543408061] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:40:06,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139560379] [2023-03-31 20:40:06,991 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:40:06,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:40:06,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:40:06,993 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) [2023-03-31 20:40:07,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 20:40:07,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-03-31 20:40:07,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:40:07,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 16 conjunts are in the unsatisfiable core [2023-03-31 20:40:07,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:40:07,096 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 [2023-03-31 20:40:07,119 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 20:40:07,119 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 23 treesize of output 15 [2023-03-31 20:40:07,173 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 20:40:07,174 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:40:07,237 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 18 treesize of output 16 [2023-03-31 20:40:07,242 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 18 treesize of output 12 [2023-03-31 20:40:07,260 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-03-31 20:40:07,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139560379] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:40:07,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [306721171] [2023-03-31 20:40:07,264 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-03-31 20:40:07,265 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:40:07,265 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:40:07,265 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:40:07,265 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:40:07,327 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 23 for LOIs [2023-03-31 20:40:07,433 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-03-31 20:40:07,441 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:40:07,913 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '536#(and (<= 0 (+ main_~main__marker~0 2147483648)) (<= 0 |main_~#main__a~0.base|) (= main_~__VERIFIER_assert__cond~0 0) (<= 100000 main_~i~0) (< main_~main__pos~0 main_~main__i~0) (<= main_~main__marker~0 2147483647) (= main_~__tmp_1~0 0) (= |old(~__return_60~0)| 0) (<= main_~main__pos~0 100000) (<= 0 main_~main__pos~0) (= |#NULL.offset| 0) (= |main_~#main__a~0.offset| 0) (= ~__return_60~0 0) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |#NULL.base| 0))' at error location [2023-03-31 20:40:07,913 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:40:07,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:40:07,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-03-31 20:40:07,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78398118] [2023-03-31 20:40:07,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:40:07,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-03-31 20:40:07,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:40:07,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-03-31 20:40:07,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2023-03-31 20:40:07,915 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:40:08,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:40:08,099 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2023-03-31 20:40:08,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-03-31 20:40:08,100 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-03-31 20:40:08,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:40:08,100 INFO L225 Difference]: With dead ends: 35 [2023-03-31 20:40:08,100 INFO L226 Difference]: Without dead ends: 24 [2023-03-31 20:40:08,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=151, Invalid=841, Unknown=0, NotChecked=0, Total=992 [2023-03-31 20:40:08,101 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 14 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:40:08,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 65 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:40:08,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-03-31 20:40:08,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-03-31 20:40:08,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:40:08,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2023-03-31 20:40:08,112 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 18 [2023-03-31 20:40:08,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:40:08,113 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2023-03-31 20:40:08,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:40:08,113 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2023-03-31 20:40:08,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-03-31 20:40:08,114 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:40:08,114 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:40:08,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 20:40:08,319 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 [2023-03-31 20:40:08,320 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:40:08,320 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:40:08,320 INFO L85 PathProgramCache]: Analyzing trace with hash 729479343, now seen corresponding path program 3 times [2023-03-31 20:40:08,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:40:08,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200605667] [2023-03-31 20:40:08,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:40:08,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:40:08,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:40:08,418 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 20:40:08,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:40:08,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200605667] [2023-03-31 20:40:08,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200605667] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:40:08,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381290044] [2023-03-31 20:40:08,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 20:40:08,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:40:08,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:40:08,420 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) [2023-03-31 20:40:08,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 20:40:08,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 20:40:08,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:40:08,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-31 20:40:08,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:40:08,506 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 20:40:08,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:40:08,568 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 20:40:08,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381290044] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:40:08,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1959510212] [2023-03-31 20:40:08,571 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-03-31 20:40:08,571 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:40:08,571 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:40:08,571 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:40:08,571 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:40:08,619 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 23 for LOIs [2023-03-31 20:40:08,699 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-03-31 20:40:08,704 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:40:09,143 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '797#(and (<= 0 (+ main_~main__marker~0 2147483648)) (<= 0 |main_~#main__a~0.base|) (= main_~__VERIFIER_assert__cond~0 0) (<= 100000 main_~i~0) (< main_~main__pos~0 main_~main__i~0) (<= main_~main__marker~0 2147483647) (= main_~__tmp_1~0 0) (= |old(~__return_60~0)| 0) (<= main_~main__pos~0 100000) (<= 0 main_~main__pos~0) (= |#NULL.offset| 0) (= |main_~#main__a~0.offset| 0) (= ~__return_60~0 0) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |#NULL.base| 0))' at error location [2023-03-31 20:40:09,143 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:40:09,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:40:09,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-03-31 20:40:09,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095479903] [2023-03-31 20:40:09,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:40:09,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-03-31 20:40:09,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:40:09,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-03-31 20:40:09,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2023-03-31 20:40:09,145 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:40:09,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:40:09,174 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2023-03-31 20:40:09,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-03-31 20:40:09,174 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2023-03-31 20:40:09,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:40:09,175 INFO L225 Difference]: With dead ends: 44 [2023-03-31 20:40:09,175 INFO L226 Difference]: Without dead ends: 31 [2023-03-31 20:40:09,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2023-03-31 20:40:09,176 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:40:09,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:40:09,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-03-31 20:40:09,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-03-31 20:40:09,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:40:09,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2023-03-31 20:40:09,186 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 23 [2023-03-31 20:40:09,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:40:09,186 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2023-03-31 20:40:09,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:40:09,187 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2023-03-31 20:40:09,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-03-31 20:40:09,187 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:40:09,187 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:40:09,195 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 20:40:09,393 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 [2023-03-31 20:40:09,393 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:40:09,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:40:09,394 INFO L85 PathProgramCache]: Analyzing trace with hash -2056148726, now seen corresponding path program 4 times [2023-03-31 20:40:09,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:40:09,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237915104] [2023-03-31 20:40:09,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:40:09,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:40:09,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:40:09,616 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 20:40:09,617 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:40:09,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237915104] [2023-03-31 20:40:09,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237915104] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:40:09,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926836147] [2023-03-31 20:40:09,617 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 20:40:09,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:40:09,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:40:09,618 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) [2023-03-31 20:40:09,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 20:40:09,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:40:09,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 14 conjunts are in the unsatisfiable core [2023-03-31 20:40:09,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:40:09,729 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 20:40:09,730 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:40:09,967 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 20:40:09,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926836147] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:40:09,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [637150716] [2023-03-31 20:40:09,970 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-03-31 20:40:09,970 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:40:09,971 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:40:09,971 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:40:09,971 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:40:10,015 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 23 for LOIs [2023-03-31 20:40:10,099 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-03-31 20:40:10,104 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:40:10,582 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1134#(and (<= 0 (+ main_~main__marker~0 2147483648)) (<= 0 |main_~#main__a~0.base|) (= main_~__VERIFIER_assert__cond~0 0) (<= 100000 main_~i~0) (< main_~main__pos~0 main_~main__i~0) (<= main_~main__marker~0 2147483647) (= main_~__tmp_1~0 0) (= |old(~__return_60~0)| 0) (<= main_~main__pos~0 100000) (<= 0 main_~main__pos~0) (= |#NULL.offset| 0) (= |main_~#main__a~0.offset| 0) (= ~__return_60~0 0) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |#NULL.base| 0))' at error location [2023-03-31 20:40:10,583 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:40:10,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:40:10,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2023-03-31 20:40:10,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13565256] [2023-03-31 20:40:10,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:40:10,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-03-31 20:40:10,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:40:10,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-03-31 20:40:10,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=1033, Unknown=0, NotChecked=0, Total=1482 [2023-03-31 20:40:10,585 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:40:10,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:40:10,633 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2023-03-31 20:40:10,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-03-31 20:40:10,634 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2023-03-31 20:40:10,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:40:10,635 INFO L225 Difference]: With dead ends: 58 [2023-03-31 20:40:10,635 INFO L226 Difference]: Without dead ends: 45 [2023-03-31 20:40:10,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=449, Invalid=1033, Unknown=0, NotChecked=0, Total=1482 [2023-03-31 20:40:10,636 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 20:40:10,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 71 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 20:40:10,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-03-31 20:40:10,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-03-31 20:40:10,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:40:10,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2023-03-31 20:40:10,649 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 30 [2023-03-31 20:40:10,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:40:10,649 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2023-03-31 20:40:10,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:40:10,650 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2023-03-31 20:40:10,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-03-31 20:40:10,651 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:40:10,651 INFO L195 NwaCegarLoop]: trace histogram [26, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:40:10,663 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-31 20:40:10,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:40:10,858 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:40:10,858 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:40:10,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1679909226, now seen corresponding path program 5 times [2023-03-31 20:40:10,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:40:10,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769654403] [2023-03-31 20:40:10,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:40:10,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:40:10,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:40:11,528 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-03-31 20:40:11,528 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:40:11,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769654403] [2023-03-31 20:40:11,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769654403] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:40:11,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230948724] [2023-03-31 20:40:11,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:40:11,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:40:11,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:40:11,530 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) [2023-03-31 20:40:11,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 20:40:11,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-03-31 20:40:11,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:40:11,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 27 conjunts are in the unsatisfiable core [2023-03-31 20:40:11,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:40:11,688 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 [2023-03-31 20:40:11,900 INFO L321 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2023-03-31 20:40:11,901 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 55 [2023-03-31 20:40:12,094 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2023-03-31 20:40:12,095 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:40:12,414 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 51 treesize of output 45 [2023-03-31 20:40:12,428 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 20:40:12,428 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 58 [2023-03-31 20:40:12,473 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2023-03-31 20:40:12,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230948724] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:40:12,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1721298196] [2023-03-31 20:40:12,476 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-03-31 20:40:12,476 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:40:12,476 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:40:12,476 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:40:12,476 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:40:12,523 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 23 for LOIs [2023-03-31 20:40:12,581 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-03-31 20:40:12,586 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:40:13,208 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1628#(and (<= 0 (+ main_~main__marker~0 2147483648)) (<= 0 |main_~#main__a~0.base|) (= main_~__VERIFIER_assert__cond~0 0) (<= 100000 main_~i~0) (< main_~main__pos~0 main_~main__i~0) (<= main_~main__marker~0 2147483647) (= main_~__tmp_1~0 0) (= |old(~__return_60~0)| 0) (<= main_~main__pos~0 100000) (<= 0 main_~main__pos~0) (= |#NULL.offset| 0) (= |main_~#main__a~0.offset| 0) (= ~__return_60~0 0) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |#NULL.base| 0))' at error location [2023-03-31 20:40:13,208 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:40:13,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:40:13,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 11, 11] total 46 [2023-03-31 20:40:13,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686683560] [2023-03-31 20:40:13,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:40:13,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-03-31 20:40:13,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:40:13,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-03-31 20:40:13,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=2543, Unknown=0, NotChecked=0, Total=3080 [2023-03-31 20:40:13,211 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 46 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 46 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:40:13,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:40:13,869 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2023-03-31 20:40:13,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-03-31 20:40:13,869 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 46 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2023-03-31 20:40:13,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:40:13,870 INFO L225 Difference]: With dead ends: 71 [2023-03-31 20:40:13,870 INFO L226 Difference]: Without dead ends: 54 [2023-03-31 20:40:13,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 101 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1421 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=696, Invalid=3860, Unknown=0, NotChecked=0, Total=4556 [2023-03-31 20:40:13,872 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 34 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:40:13,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 83 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:40:13,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-03-31 20:40:13,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-03-31 20:40:13,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:40:13,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2023-03-31 20:40:13,887 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 44 [2023-03-31 20:40:13,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:40:13,888 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2023-03-31 20:40:13,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 46 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:40:13,888 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2023-03-31 20:40:13,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-03-31 20:40:13,889 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:40:13,889 INFO L195 NwaCegarLoop]: trace histogram [27, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:40:13,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-03-31 20:40:14,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:40:14,098 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:40:14,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:40:14,098 INFO L85 PathProgramCache]: Analyzing trace with hash -764380709, now seen corresponding path program 6 times [2023-03-31 20:40:14,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:40:14,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652345438] [2023-03-31 20:40:14,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:40:14,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:40:14,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:40:14,791 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-03-31 20:40:14,792 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:40:14,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652345438] [2023-03-31 20:40:14,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652345438] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:40:14,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441452012] [2023-03-31 20:40:14,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 20:40:14,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:40:14,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:40:14,793 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) [2023-03-31 20:40:14,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-03-31 20:40:14,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 20:40:14,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:40:14,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 29 conjunts are in the unsatisfiable core [2023-03-31 20:40:14,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:40:14,980 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-03-31 20:40:14,981 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:40:15,858 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-03-31 20:40:15,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441452012] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:40:15,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [773481443] [2023-03-31 20:40:15,863 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-03-31 20:40:15,864 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:40:15,864 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:40:15,864 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:40:15,864 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:40:15,887 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 23 for LOIs [2023-03-31 20:40:15,946 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-03-31 20:40:15,950 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:40:16,417 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2245#(and (<= 0 (+ main_~main__marker~0 2147483648)) (<= 0 |main_~#main__a~0.base|) (= main_~__VERIFIER_assert__cond~0 0) (<= 100000 main_~i~0) (< main_~main__pos~0 main_~main__i~0) (<= main_~main__marker~0 2147483647) (= (select (select |#memory_int| |main_~#main__a~0.base|) (* 4 main_~main__i~0)) main_~main__marker~0) (= main_~__tmp_1~0 0) (= |old(~__return_60~0)| 0) (<= main_~main__pos~0 100000) (<= 0 main_~main__pos~0) (= |#NULL.offset| 0) (= |main_~#main__a~0.offset| 0) (= ~__return_60~0 0) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |#NULL.base| 0))' at error location [2023-03-31 20:40:16,417 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:40:16,417 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:40:16,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 59 [2023-03-31 20:40:16,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171976678] [2023-03-31 20:40:16,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:40:16,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-03-31 20:40:16,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:40:16,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-03-31 20:40:16,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1761, Invalid=3069, Unknown=0, NotChecked=0, Total=4830 [2023-03-31 20:40:16,422 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 59 states, 59 states have (on average 1.152542372881356) internal successors, (68), 59 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:40:16,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:40:16,530 INFO L93 Difference]: Finished difference Result 104 states and 134 transitions. [2023-03-31 20:40:16,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-03-31 20:40:16,531 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.152542372881356) internal successors, (68), 59 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2023-03-31 20:40:16,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:40:16,536 INFO L225 Difference]: With dead ends: 104 [2023-03-31 20:40:16,536 INFO L226 Difference]: Without dead ends: 83 [2023-03-31 20:40:16,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1761, Invalid=3069, Unknown=0, NotChecked=0, Total=4830 [2023-03-31 20:40:16,539 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:40:16,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:40:16,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-03-31 20:40:16,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-03-31 20:40:16,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 79 states have internal predecessors, (81), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:40:16,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2023-03-31 20:40:16,591 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 53 [2023-03-31 20:40:16,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:40:16,592 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2023-03-31 20:40:16,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.152542372881356) internal successors, (68), 59 states have internal predecessors, (68), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:40:16,592 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2023-03-31 20:40:16,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-03-31 20:40:16,601 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:40:16,601 INFO L195 NwaCegarLoop]: trace histogram [56, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:40:16,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-03-31 20:40:16,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:40:16,808 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:40:16,808 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:40:16,808 INFO L85 PathProgramCache]: Analyzing trace with hash -2041574442, now seen corresponding path program 7 times [2023-03-31 20:40:16,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:40:16,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372396150] [2023-03-31 20:40:16,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:40:16,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:40:16,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:40:18,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1652 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-03-31 20:40:18,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:40:18,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372396150] [2023-03-31 20:40:18,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372396150] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:40:18,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969369239] [2023-03-31 20:40:18,940 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 20:40:18,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:40:18,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:40:18,945 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) [2023-03-31 20:40:18,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-03-31 20:40:19,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:40:19,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 635 conjuncts, 58 conjunts are in the unsatisfiable core [2023-03-31 20:40:19,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:40:19,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1652 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-03-31 20:40:19,192 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:40:22,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1652 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-03-31 20:40:22,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969369239] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:40:22,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2048574305] [2023-03-31 20:40:22,416 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-03-31 20:40:22,416 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:40:22,416 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:40:22,416 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:40:22,416 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:40:22,438 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 23 for LOIs [2023-03-31 20:40:22,503 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-03-31 20:40:22,506 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:40:23,070 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3195#(and (<= 0 (+ main_~main__marker~0 2147483648)) (<= 0 |main_~#main__a~0.base|) (= main_~__VERIFIER_assert__cond~0 0) (<= 100000 main_~i~0) (< main_~main__pos~0 main_~main__i~0) (<= main_~main__marker~0 2147483647) (= (select (select |#memory_int| |main_~#main__a~0.base|) (* 4 main_~main__i~0)) main_~main__marker~0) (= main_~__tmp_1~0 0) (= |old(~__return_60~0)| 0) (<= main_~main__pos~0 100000) (<= 0 main_~main__pos~0) (= |#NULL.offset| 0) (= |main_~#main__a~0.offset| 0) (= ~__return_60~0 0) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |#NULL.base| 0))' at error location [2023-03-31 20:40:23,071 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:40:23,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:40:23,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 117 [2023-03-31 20:40:23,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351676019] [2023-03-31 20:40:23,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:40:23,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2023-03-31 20:40:23,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:40:23,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2023-03-31 20:40:23,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6836, Invalid=9420, Unknown=0, NotChecked=0, Total=16256 [2023-03-31 20:40:23,078 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand has 117 states, 117 states have (on average 1.0769230769230769) internal successors, (126), 117 states have internal predecessors, (126), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:40:23,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:40:23,246 INFO L93 Difference]: Finished difference Result 162 states and 221 transitions. [2023-03-31 20:40:23,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2023-03-31 20:40:23,247 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.0769230769230769) internal successors, (126), 117 states have internal predecessors, (126), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2023-03-31 20:40:23,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:40:23,248 INFO L225 Difference]: With dead ends: 162 [2023-03-31 20:40:23,248 INFO L226 Difference]: Without dead ends: 141 [2023-03-31 20:40:23,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2116 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=6836, Invalid=9420, Unknown=0, NotChecked=0, Total=16256 [2023-03-31 20:40:23,252 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 20:40:23,252 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 20:40:23,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-03-31 20:40:23,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2023-03-31 20:40:23,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 137 states have (on average 1.0145985401459854) internal successors, (139), 137 states have internal predecessors, (139), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:40:23,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2023-03-31 20:40:23,284 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 82 [2023-03-31 20:40:23,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:40:23,285 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2023-03-31 20:40:23,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.0769230769230769) internal successors, (126), 117 states have internal predecessors, (126), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:40:23,285 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2023-03-31 20:40:23,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-03-31 20:40:23,286 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:40:23,286 INFO L195 NwaCegarLoop]: trace histogram [114, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:40:23,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-03-31 20:40:23,493 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,SelfDestructingSolverStorable8 [2023-03-31 20:40:23,493 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:40:23,494 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:40:23,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1403679222, now seen corresponding path program 8 times [2023-03-31 20:40:23,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:40:23,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400474152] [2023-03-31 20:40:23,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:40:23,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:40:23,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:40:30,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6611 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-03-31 20:40:30,823 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:40:30,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400474152] [2023-03-31 20:40:30,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400474152] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:40:30,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274858691] [2023-03-31 20:40:30,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 20:40:30,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:40:30,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:40:30,825 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) [2023-03-31 20:40:30,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-03-31 20:40:31,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-03-31 20:40:31,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:40:31,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 49 conjunts are in the unsatisfiable core [2023-03-31 20:40:31,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:40:31,262 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 [2023-03-31 20:40:32,450 INFO L321 Elim1Store]: treesize reduction 24, result has 82.7 percent of original size [2023-03-31 20:40:32,451 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 84 treesize of output 145 [2023-03-31 20:40:32,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6611 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 6555 trivial. 0 not checked. [2023-03-31 20:40:32,916 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 20:40:34,877 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 116 treesize of output 102 [2023-03-31 20:40:34,921 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 20:40:34,921 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 113 treesize of output 164 [2023-03-31 20:40:35,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6611 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 6555 trivial. 0 not checked. [2023-03-31 20:40:35,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274858691] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 20:40:35,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [895448896] [2023-03-31 20:40:35,038 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-03-31 20:40:35,038 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 20:40:35,038 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 20:40:35,038 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 20:40:35,038 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 20:40:35,058 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 23 for LOIs [2023-03-31 20:40:35,110 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2023-03-31 20:40:35,115 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 20:40:36,208 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4758#(and (<= 0 (+ main_~main__marker~0 2147483648)) (<= 0 |main_~#main__a~0.base|) (= main_~__VERIFIER_assert__cond~0 0) (<= 100000 main_~i~0) (< main_~main__pos~0 main_~main__i~0) (<= main_~main__marker~0 2147483647) (= (select (select |#memory_int| |main_~#main__a~0.base|) (* 4 main_~main__i~0)) main_~main__marker~0) (= main_~__tmp_1~0 0) (= |old(~__return_60~0)| 0) (<= main_~main__pos~0 100000) (<= 0 main_~main__pos~0) (= |#NULL.offset| 0) (= |main_~#main__a~0.offset| 0) (= ~__return_60~0 0) (<= 0 |#StackHeapBarrier|) (= ~__return_main~0 0) (= |#NULL.base| 0))' at error location [2023-03-31 20:40:36,208 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 20:40:36,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 20:40:36,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 19, 19] total 150 [2023-03-31 20:40:36,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242528734] [2023-03-31 20:40:36,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 20:40:36,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 150 states [2023-03-31 20:40:36,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 20:40:36,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2023-03-31 20:40:36,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7099, Invalid=18661, Unknown=0, NotChecked=0, Total=25760 [2023-03-31 20:40:36,219 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 150 states, 150 states have (on average 1.0933333333333333) internal successors, (164), 150 states have internal predecessors, (164), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:40:42,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 20:40:42,239 INFO L93 Difference]: Finished difference Result 187 states and 197 transitions. [2023-03-31 20:40:42,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2023-03-31 20:40:42,240 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 150 states have (on average 1.0933333333333333) internal successors, (164), 150 states have internal predecessors, (164), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 140 [2023-03-31 20:40:42,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 20:40:42,241 INFO L225 Difference]: With dead ends: 187 [2023-03-31 20:40:42,241 INFO L226 Difference]: Without dead ends: 158 [2023-03-31 20:40:42,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 562 GetRequests, 376 SyntacticMatches, 1 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6746 ImplicationChecksByTransitivity, 13.9s TimeCoverageRelationStatistics Valid=7701, Invalid=27081, Unknown=0, NotChecked=0, Total=34782 [2023-03-31 20:40:42,244 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 88 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 20:40:42,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 117 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 20:40:42,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2023-03-31 20:40:42,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2023-03-31 20:40:42,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 154 states have (on average 1.0129870129870129) internal successors, (156), 154 states have internal predecessors, (156), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:40:42,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 159 transitions. [2023-03-31 20:40:42,274 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 159 transitions. Word has length 140 [2023-03-31 20:40:42,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 20:40:42,275 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 159 transitions. [2023-03-31 20:40:42,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 150 states, 150 states have (on average 1.0933333333333333) internal successors, (164), 150 states have internal predecessors, (164), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 20:40:42,275 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 159 transitions. [2023-03-31 20:40:42,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-03-31 20:40:42,287 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 20:40:42,288 INFO L195 NwaCegarLoop]: trace histogram [115, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 20:40:42,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-03-31 20:40:42,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-03-31 20:40:42,495 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 20:40:42,495 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 20:40:42,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1173968269, now seen corresponding path program 9 times [2023-03-31 20:40:42,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 20:40:42,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532195368] [2023-03-31 20:40:42,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 20:40:42,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 20:40:42,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 20:40:49,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6910 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2023-03-31 20:40:49,398 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 20:40:49,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532195368] [2023-03-31 20:40:49,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532195368] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 20:40:49,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290977272] [2023-03-31 20:40:49,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 20:40:49,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 20:40:49,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 20:40:49,400 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) [2023-03-31 20:40:49,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-03-31 20:40:49,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 20:40:49,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 20:40:49,722 INFO L262 TraceCheckSpWp]: Trace formula consists of 1206 conjuncts, 117 conjunts are in the unsatisfiable core [2023-03-31 20:40:49,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 20:40:49,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6910 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2023-03-31 20:40:49,880 INFO L327 TraceCheckSpWp]: Computing backward predicates...