/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 OctagonDomain -i ../sv-benchmarks/c/ldv-regression/test24-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 21:30:53,889 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 21:30:53,891 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 21:30:53,918 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 21:30:53,918 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 21:30:53,921 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 21:30:53,923 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 21:30:53,925 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 21:30:53,926 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 21:30:53,930 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 21:30:53,931 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 21:30:53,931 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2023-04-02 21:30:53,955 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 21:30:53,956 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 21:30:53,956 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 21:30:53,958 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-02 21:30:53,986 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 21:30:53,987 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 21:30:53,987 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 21:30:53,987 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 21:30:53,988 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 21:30:53,988 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 21:30:53,988 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 21:30:53,988 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 21:30:53,988 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 21:30:53,988 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 21:30:53,989 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 21:30:53,989 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 21:30:53,989 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 21:30:53,989 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 21:30:53,990 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 21:30:53,990 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 21:30:53,990 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 21:30:53,990 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 21:30:53,990 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 21:30:53,990 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 21:30:53,990 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 21:30:53,991 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 21:30:53,991 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 21:30:53,991 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 21:30:53,991 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 21:30:53,991 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 21:30:53,991 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 21:30:53,991 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 21:30:53,991 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 21:30:53,991 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 21:30:53,991 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 21:30:53,992 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 21:30:53,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 21:30:53,992 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 21:30:53,992 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 21:30:53,992 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 21:30:53,992 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 21:30:53,992 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 21:30:53,992 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 21:30:53,992 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 21:30:53,992 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 21:30:53,993 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 21:30:54,185 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 21:30:54,203 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 21:30:54,205 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 21:30:54,206 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 21:30:54,206 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 21:30:54,207 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test24-1.c [2023-04-02 21:30:55,249 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 21:30:55,446 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 21:30:55,447 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test24-1.c [2023-04-02 21:30:55,450 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8d33a5b7/a603402a4f774de6a43d4d063f03649a/FLAGb4030ac8e [2023-04-02 21:30:55,461 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a8d33a5b7/a603402a4f774de6a43d4d063f03649a [2023-04-02 21:30:55,463 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 21:30:55,464 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 21:30:55,465 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 21:30:55,465 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 21:30:55,472 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 21:30:55,472 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 09:30:55" (1/1) ... [2023-04-02 21:30:55,473 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3011450b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:30:55, skipping insertion in model container [2023-04-02 21:30:55,473 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 09:30:55" (1/1) ... [2023-04-02 21:30:55,478 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 21:30:55,487 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 21:30:55,586 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/ldv-regression/test24-1.c[704,717] [2023-04-02 21:30:55,590 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 21:30:55,598 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 21:30:55,609 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/ldv-regression/test24-1.c[704,717] [2023-04-02 21:30:55,610 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 21:30:55,629 INFO L208 MainTranslator]: Completed translation [2023-04-02 21:30:55,629 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:30:55 WrapperNode [2023-04-02 21:30:55,629 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 21:30:55,630 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 21:30:55,630 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 21:30:55,630 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 21:30:55,638 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:30:55" (1/1) ... [2023-04-02 21:30:55,638 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:30:55" (1/1) ... [2023-04-02 21:30:55,642 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:30:55" (1/1) ... [2023-04-02 21:30:55,642 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:30:55" (1/1) ... [2023-04-02 21:30:55,646 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:30:55" (1/1) ... [2023-04-02 21:30:55,648 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:30:55" (1/1) ... [2023-04-02 21:30:55,648 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:30:55" (1/1) ... [2023-04-02 21:30:55,649 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:30:55" (1/1) ... [2023-04-02 21:30:55,650 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 21:30:55,651 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 21:30:55,651 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 21:30:55,651 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 21:30:55,655 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:30:55" (1/1) ... [2023-04-02 21:30:55,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 21:30:55,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:30:55,686 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-02 21:30:55,700 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-02 21:30:55,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 21:30:55,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 21:30:55,716 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 21:30:55,716 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2023-04-02 21:30:55,716 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 21:30:55,717 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 21:30:55,717 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 21:30:55,717 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 21:30:55,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 21:30:55,717 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 21:30:55,717 INFO L130 BoogieDeclarations]: Found specification of procedure check [2023-04-02 21:30:55,717 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 21:30:55,717 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 21:30:55,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 21:30:55,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 21:30:55,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 21:30:55,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 21:30:55,718 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 21:30:55,718 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 21:30:55,765 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 21:30:55,767 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 21:30:55,861 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 21:30:55,873 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 21:30:55,873 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 21:30:55,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 09:30:55 BoogieIcfgContainer [2023-04-02 21:30:55,875 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 21:30:55,876 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 21:30:55,876 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 21:30:55,878 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 21:30:55,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 09:30:55" (1/3) ... [2023-04-02 21:30:55,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79250120 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 09:30:55, skipping insertion in model container [2023-04-02 21:30:55,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:30:55" (2/3) ... [2023-04-02 21:30:55,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79250120 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 09:30:55, skipping insertion in model container [2023-04-02 21:30:55,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 09:30:55" (3/3) ... [2023-04-02 21:30:55,880 INFO L112 eAbstractionObserver]: Analyzing ICFG test24-1.c [2023-04-02 21:30:55,892 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 21:30:55,893 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 21:30:55,924 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 21:30:55,928 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;@c4f325e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 21:30:55,929 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 21:30:55,932 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-02 21:30:55,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-02 21:30:55,937 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:30:55,938 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:30:55,938 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:30:55,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:30:55,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1842021694, now seen corresponding path program 1 times [2023-04-02 21:30:55,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:30:55,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561411176] [2023-04-02 21:30:55,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:30:55,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:30:56,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:30:56,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:30:56,058 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:30:56,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561411176] [2023-04-02 21:30:56,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561411176] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:30:56,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:30:56,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 21:30:56,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402828092] [2023-04-02 21:30:56,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:30:56,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 21:30:56,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:30:56,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 21:30:56,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 21:30:56,090 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 21:30:56,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:30:56,117 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2023-04-02 21:30:56,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 21:30:56,119 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 13 [2023-04-02 21:30:56,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:30:56,123 INFO L225 Difference]: With dead ends: 32 [2023-04-02 21:30:56,123 INFO L226 Difference]: Without dead ends: 15 [2023-04-02 21:30:56,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 21:30:56,128 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 21:30:56,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 21:30:56,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-04-02 21:30:56,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-04-02 21:30:56,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 21:30:56,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2023-04-02 21:30:56,154 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2023-04-02 21:30:56,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:30:56,155 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2023-04-02 21:30:56,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 21:30:56,156 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2023-04-02 21:30:56,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-02 21:30:56,158 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:30:56,158 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:30:56,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 21:30:56,158 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:30:56,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:30:56,159 INFO L85 PathProgramCache]: Analyzing trace with hash -700970458, now seen corresponding path program 1 times [2023-04-02 21:30:56,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:30:56,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717221073] [2023-04-02 21:30:56,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:30:56,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:30:56,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:30:56,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:30:56,375 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:30:56,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717221073] [2023-04-02 21:30:56,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717221073] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:30:56,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:30:56,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 21:30:56,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781684140] [2023-04-02 21:30:56,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:30:56,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 21:30:56,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:30:56,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 21:30:56,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 21:30:56,378 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 21:30:56,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:30:56,408 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2023-04-02 21:30:56,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 21:30:56,408 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2023-04-02 21:30:56,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:30:56,409 INFO L225 Difference]: With dead ends: 24 [2023-04-02 21:30:56,409 INFO L226 Difference]: Without dead ends: 17 [2023-04-02 21:30:56,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 21:30:56,410 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 21:30:56,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 25 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 21:30:56,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-04-02 21:30:56,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-04-02 21:30:56,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 21:30:56,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2023-04-02 21:30:56,414 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2023-04-02 21:30:56,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:30:56,414 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2023-04-02 21:30:56,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 21:30:56,415 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2023-04-02 21:30:56,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-02 21:30:56,415 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:30:56,415 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:30:56,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 21:30:56,415 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:30:56,416 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:30:56,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1385670571, now seen corresponding path program 1 times [2023-04-02 21:30:56,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:30:56,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270874540] [2023-04-02 21:30:56,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:30:56,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:30:56,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:30:56,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:30:56,683 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:30:56,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270874540] [2023-04-02 21:30:56,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270874540] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:30:56,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527495520] [2023-04-02 21:30:56,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:30:56,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:30:56,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:30:56,686 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 21:30:56,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 21:30:56,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:30:56,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 21:30:56,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:30:56,885 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:30:56,886 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 27 treesize of output 12 [2023-04-02 21:30:56,897 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:30:56,898 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:30:56,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:30:56,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527495520] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:30:56,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1330486547] [2023-04-02 21:30:56,956 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 21:30:56,957 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:30:56,959 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:30:56,963 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:30:56,963 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:30:57,051 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 21:30:57,341 INFO L197 IcfgInterpreter]: Interpreting procedure check with input of size 19 for LOIs [2023-04-02 21:30:57,350 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:30:57,355 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:30:57,757 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '265#(and (<= 1 |#StackHeapBarrier|) (= |main_~#ad1~0.offset| 0) (= main_~pa~0.base main_~ad2~0.base) (= main_~ad2~0.offset 0) (= |main_~#ad1~0.base| main_~ad2~0.base) (= |#NULL.offset| 0) (<= (+ |#StackHeapBarrier| 1) main_~pa~0.base) (= |#NULL.base| 0))' at error location [2023-04-02 21:30:57,757 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:30:57,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:30:57,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 13 [2023-04-02 21:30:57,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565253133] [2023-04-02 21:30:57,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 21:30:57,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-02 21:30:57,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:30:57,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-02 21:30:57,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2023-04-02 21:30:57,759 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 21:30:57,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:30:57,884 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2023-04-02 21:30:57,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-02 21:30:57,885 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 16 [2023-04-02 21:30:57,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:30:57,886 INFO L225 Difference]: With dead ends: 30 [2023-04-02 21:30:57,886 INFO L226 Difference]: Without dead ends: 23 [2023-04-02 21:30:57,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2023-04-02 21:30:57,888 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 13 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 21:30:57,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 40 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 21:30:57,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-02 21:30:57,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-04-02 21:30:57,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-02 21:30:57,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2023-04-02 21:30:57,892 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 16 [2023-04-02 21:30:57,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:30:57,892 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2023-04-02 21:30:57,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 21:30:57,892 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2023-04-02 21:30:57,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-02 21:30:57,893 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:30:57,893 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:30:57,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 21:30:58,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:30:58,100 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:30:58,101 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:30:58,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1026814138, now seen corresponding path program 2 times [2023-04-02 21:30:58,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:30:58,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076277513] [2023-04-02 21:30:58,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:30:58,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:30:58,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:30:58,297 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:30:58,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:30:58,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076277513] [2023-04-02 21:30:58,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076277513] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:30:58,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529592974] [2023-04-02 21:30:58,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 21:30:58,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:30:58,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:30:58,301 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 21:30:58,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 21:30:58,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 21:30:58,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 21:30:58,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 35 conjunts are in the unsatisfiable core [2023-04-02 21:30:58,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:30:58,358 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 27 treesize of output 23 [2023-04-02 21:31:06,802 INFO L321 Elim1Store]: treesize reduction 188, result has 20.0 percent of original size [2023-04-02 21:31:06,803 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 202 treesize of output 127 [2023-04-02 21:31:06,922 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-02 21:31:06,922 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:31:09,275 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-04-02 21:31:09,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529592974] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:31:09,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [572371278] [2023-04-02 21:31:09,278 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2023-04-02 21:31:09,278 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:31:09,278 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:31:09,278 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:31:09,278 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:31:09,306 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 18 for LOIs [2023-04-02 21:31:09,447 INFO L197 IcfgInterpreter]: Interpreting procedure check with input of size 19 for LOIs [2023-04-02 21:31:09,452 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:31:09,455 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:31:10,118 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '516#(and (<= 1 |#StackHeapBarrier|) (= |main_~#ad1~0.offset| 0) (= main_~pa~0.base main_~ad2~0.base) (= main_~ad2~0.offset 0) (= |main_~#ad1~0.base| main_~ad2~0.base) (= |#NULL.offset| 0) (<= (+ |#StackHeapBarrier| 1) main_~pa~0.base) (= |#NULL.base| 0))' at error location [2023-04-02 21:31:10,119 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:31:10,120 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:31:10,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-04-02 21:31:10,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138839929] [2023-04-02 21:31:10,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 21:31:10,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-02 21:31:10,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:31:10,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-02 21:31:10,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=880, Unknown=1, NotChecked=0, Total=992 [2023-04-02 21:31:10,128 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 23 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 23 states have internal predecessors, (37), 4 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 21:31:38,430 WARN L223 SmtUtils]: Spent 28.21s on a formula simplification. DAG size of input: 66 DAG size of output: 64 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 21:31:46,644 WARN L223 SmtUtils]: Spent 8.14s on a formula simplification. DAG size of input: 68 DAG size of output: 67 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 21:31:54,870 WARN L223 SmtUtils]: Spent 8.16s on a formula simplification. DAG size of input: 67 DAG size of output: 66 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 21:32:02,334 WARN L223 SmtUtils]: Spent 7.39s on a formula simplification. DAG size of input: 67 DAG size of output: 66 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 21:32:10,511 WARN L223 SmtUtils]: Spent 8.10s on a formula simplification. DAG size of input: 66 DAG size of output: 64 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 21:32:18,721 WARN L223 SmtUtils]: Spent 8.15s on a formula simplification. DAG size of input: 62 DAG size of output: 61 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 21:32:25,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:32:25,800 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2023-04-02 21:32:25,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-02 21:32:25,801 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 23 states have internal predecessors, (37), 4 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 22 [2023-04-02 21:32:25,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:32:25,801 INFO L225 Difference]: With dead ends: 30 [2023-04-02 21:32:25,801 INFO L226 Difference]: Without dead ends: 0 [2023-04-02 21:32:25,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 86.6s TimeCoverageRelationStatistics Valid=298, Invalid=1681, Unknown=1, NotChecked=0, Total=1980 [2023-04-02 21:32:25,803 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 13 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 21:32:25,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 41 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 21:32:25,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-04-02 21:32:25,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-04-02 21:32:25,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-04-02 21:32:25,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-04-02 21:32:25,804 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 22 [2023-04-02 21:32:25,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:32:25,804 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-04-02 21:32:25,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 23 states have internal predecessors, (37), 4 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 21:32:25,804 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-04-02 21:32:25,804 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-04-02 21:32:25,807 INFO L805 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-02 21:32:25,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 21:32:26,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-04-02 21:32:26,015 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-04-02 21:32:26,083 INFO L899 garLoopResultBuilder]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2023-04-02 21:32:26,083 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line 3) no Hoare annotation was computed. [2023-04-02 21:32:26,083 INFO L899 garLoopResultBuilder]: For program point L31(line 31) no Hoare annotation was computed. [2023-04-02 21:32:26,083 INFO L899 garLoopResultBuilder]: For program point L31-1(lines 31 33) no Hoare annotation was computed. [2023-04-02 21:32:26,083 INFO L899 garLoopResultBuilder]: For program point mainEXIT(lines 16 40) no Hoare annotation was computed. [2023-04-02 21:32:26,083 INFO L899 garLoopResultBuilder]: For program point L23(lines 23 34) no Hoare annotation was computed. [2023-04-02 21:32:26,083 INFO L899 garLoopResultBuilder]: For program point L23-2(lines 23 34) no Hoare annotation was computed. [2023-04-02 21:32:26,083 INFO L899 garLoopResultBuilder]: For program point mainFINAL(lines 16 40) no Hoare annotation was computed. [2023-04-02 21:32:26,083 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 16 40) the Hoare annotation is: true [2023-04-02 21:32:26,083 INFO L899 garLoopResultBuilder]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 38) no Hoare annotation was computed. [2023-04-02 21:32:26,084 INFO L899 garLoopResultBuilder]: For program point L28-1(lines 28 30) no Hoare annotation was computed. [2023-04-02 21:32:26,084 INFO L895 garLoopResultBuilder]: At program point L28-3(lines 28 30) the Hoare annotation is: (and (= |main_~#ad1~0.offset| 0) (= main_~pa~0.base |main_~#ad1~0.base|) (= 0 (mod main_~pa~0.offset 8)) (<= main_~i~0 (select (select |#memory_int| main_~pa~0.base) main_~pa~0.offset)) (let ((.cse0 (div main_~pa~0.offset 8))) (= .cse0 (select (select |#memory_int| |main_~#ad1~0.base|) (* .cse0 8))))) [2023-04-02 21:32:26,084 INFO L895 garLoopResultBuilder]: At program point L28-4(lines 28 30) the Hoare annotation is: (let ((.cse1 (select |#memory_int| |main_~#ad1~0.base|))) (and (= |main_~#ad1~0.offset| 0) (exists ((v_y_5 Int)) (let ((.cse0 (select .cse1 (* v_y_5 8)))) (and (<= .cse0 main_~i~0) (<= main_~i~0 .cse0) (= v_y_5 .cse0)))) (= main_~pa~0.base |main_~#ad1~0.base|) (= 0 (mod main_~pa~0.offset 8)) (<= main_~i~0 (select (select |#memory_int| main_~pa~0.base) main_~pa~0.offset)) (let ((.cse2 (div main_~pa~0.offset 8))) (= .cse2 (select .cse1 (* .cse2 8)))))) [2023-04-02 21:32:26,084 INFO L895 garLoopResultBuilder]: At program point ERROR(lines 17 40) the Hoare annotation is: false [2023-04-02 21:32:26,084 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 11 14) the Hoare annotation is: true [2023-04-02 21:32:26,084 INFO L899 garLoopResultBuilder]: For program point checkEXIT(lines 11 14) no Hoare annotation was computed. [2023-04-02 21:32:26,084 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-04-02 21:32:26,084 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2023-04-02 21:32:26,084 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-04-02 21:32:26,084 INFO L902 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2023-04-02 21:32:26,085 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-04-02 21:32:26,085 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-04-02 21:32:26,087 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1] [2023-04-02 21:32:26,090 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-02 21:32:26,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.04 09:32:26 BoogieIcfgContainer [2023-04-02 21:32:26,102 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-02 21:32:26,102 INFO L158 Benchmark]: Toolchain (without parser) took 90638.31ms. Allocated memory was 276.8MB in the beginning and 355.5MB in the end (delta: 78.6MB). Free memory was 239.9MB in the beginning and 160.8MB in the end (delta: 79.1MB). Peak memory consumption was 158.8MB. Max. memory is 8.0GB. [2023-04-02 21:32:26,103 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 172.0MB. Free memory is still 122.2MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-02 21:32:26,103 INFO L158 Benchmark]: CACSL2BoogieTranslator took 164.77ms. Allocated memory is still 276.8MB. Free memory was 239.9MB in the beginning and 229.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-04-02 21:32:26,103 INFO L158 Benchmark]: Boogie Preprocessor took 19.74ms. Allocated memory is still 276.8MB. Free memory was 229.4MB in the beginning and 227.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-04-02 21:32:26,103 INFO L158 Benchmark]: RCFGBuilder took 224.28ms. Allocated memory is still 276.8MB. Free memory was 227.9MB in the beginning and 216.3MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-04-02 21:32:26,103 INFO L158 Benchmark]: TraceAbstraction took 90225.73ms. Allocated memory was 276.8MB in the beginning and 355.5MB in the end (delta: 78.6MB). Free memory was 215.3MB in the beginning and 160.8MB in the end (delta: 54.5MB). Peak memory consumption was 133.6MB. Max. memory is 8.0GB. [2023-04-02 21:32:26,104 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 172.0MB. Free memory is still 122.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 164.77ms. Allocated memory is still 276.8MB. Free memory was 239.9MB in the beginning and 229.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 19.74ms. Allocated memory is still 276.8MB. Free memory was 229.4MB in the beginning and 227.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 224.28ms. Allocated memory is still 276.8MB. Free memory was 227.9MB in the beginning and 216.3MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 90225.73ms. Allocated memory was 276.8MB in the beginning and 355.5MB in the end (delta: 78.6MB). Free memory was 215.3MB in the beginning and 160.8MB in the end (delta: 54.5MB). Peak memory consumption was 133.6MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 38]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 90.2s, OverallIterations: 4, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 75.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 28 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 27 mSDsluCounter, 125 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 79 mSDsCounter, 8 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 157 IncrementalHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 8 mSolverCounterUnsat, 46 mSDtfsCounter, 157 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 154 GetRequests, 76 SyntacticMatches, 7 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 87.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=3, InterpolantAutomatonStates: 34, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 12 PreInvPairs, 18 NumberOfFragments, 99 HoareAnnotationTreeSize, 12 FomulaSimplifications, 281 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 184 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 11.8s InterpolantComputationTime, 103 NumberOfCodeBlocks, 99 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 133 ConstructedInterpolants, 10 QuantifiedInterpolants, 1350 SizeOfPredicates, 23 NumberOfNonLiveVariables, 211 ConjunctsInSsa, 47 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 25/66 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: (((ad1 == 0 && pa == ad1) && 0 == pa % 8) && i <= unknown-#memory_int-unknown[pa][pa]) && pa / 8 == unknown-#memory_int-unknown[ad1][pa / 8 * 8] - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 0 RESULT: Ultimate proved your program to be correct! [2023-04-02 21:32:26,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...