/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/float-benchs/drift_tenth.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:43:41,240 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:43:41,241 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:43:41,265 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:43:41,266 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:43:41,267 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:43:41,268 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:43:41,269 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:43:41,271 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:43:41,272 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:43:41,273 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:43:41,273 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2023-03-31 22:43:41,290 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:43:41,291 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:43:41,291 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:43:41,292 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:43:41,293 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:43:41,293 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:43:41,293 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:43:41,293 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:43:41,294 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:43:41,294 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:43:41,295 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:43:41,298 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 22:43:41,328 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:43:41,328 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:43:41,329 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:43:41,329 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:43:41,329 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:43:41,329 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:43:41,330 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:43:41,330 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:43:41,330 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:43:41,330 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:43:41,330 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:43:41,330 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:43:41,330 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:43:41,330 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:43:41,330 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:43:41,331 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:43:41,331 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:43:41,331 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:43:41,331 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:43:41,332 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:43:41,332 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:43:41,332 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:43:41,332 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:43:41,332 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:43:41,332 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:43:41,332 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:43:41,332 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:43:41,333 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:43:41,333 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:43:41,333 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:43:41,333 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:43:41,333 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:43:41,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:43:41,333 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:43:41,333 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:43:41,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:43:41,334 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:43:41,334 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:43:41,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:43:41,334 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:43:41,334 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:43:41,334 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:43:41,578 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:43:41,606 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:43:41,608 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:43:41,609 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:43:41,610 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:43:41,611 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/drift_tenth.c [2023-03-31 22:43:42,728 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:43:42,922 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:43:42,923 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/drift_tenth.c [2023-03-31 22:43:42,929 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/664dc70a9/2cbdd20147a9441c8ba0813fe9ba2fe5/FLAG911fee474 [2023-03-31 22:43:42,944 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/664dc70a9/2cbdd20147a9441c8ba0813fe9ba2fe5 [2023-03-31 22:43:42,948 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:43:42,949 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:43:42,953 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:43:42,953 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:43:42,956 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:43:42,956 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:43:42" (1/1) ... [2023-03-31 22:43:42,958 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2eff763 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:43:42, skipping insertion in model container [2023-03-31 22:43:42,958 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:43:42" (1/1) ... [2023-03-31 22:43:42,964 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:43:42,975 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:43:43,095 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/float-benchs/drift_tenth.c[348,361] [2023-03-31 22:43:43,109 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:43:43,117 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:43:43,125 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/float-benchs/drift_tenth.c[348,361] [2023-03-31 22:43:43,127 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:43:43,137 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:43:43,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:43:43 WrapperNode [2023-03-31 22:43:43,137 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:43:43,138 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:43:43,138 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:43:43,138 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:43:43,148 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:43:43" (1/1) ... [2023-03-31 22:43:43,148 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:43:43" (1/1) ... [2023-03-31 22:43:43,153 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:43:43" (1/1) ... [2023-03-31 22:43:43,153 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:43:43" (1/1) ... [2023-03-31 22:43:43,157 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:43:43" (1/1) ... [2023-03-31 22:43:43,160 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:43:43" (1/1) ... [2023-03-31 22:43:43,161 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:43:43" (1/1) ... [2023-03-31 22:43:43,162 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:43:43" (1/1) ... [2023-03-31 22:43:43,163 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:43:43,164 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:43:43,164 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:43:43,164 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:43:43,165 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:43:43" (1/1) ... [2023-03-31 22:43:43,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:43:43,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:43:43,192 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 22:43:43,194 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 22:43:43,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:43:43,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:43:43,228 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:43:43,230 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-31 22:43:43,230 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:43:43,230 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:43:43,233 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:43:43,233 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:43:43,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:43:43,233 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-31 22:43:43,233 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:43:43,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:43:43,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:43:43,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:43:43,234 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:43:43,234 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:43:43,235 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:43:43,293 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:43:43,294 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:43:43,367 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:43:43,386 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:43:43,386 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-03-31 22:43:43,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:43:43 BoogieIcfgContainer [2023-03-31 22:43:43,398 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:43:43,400 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:43:43,400 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:43:43,403 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:43:43,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:43:42" (1/3) ... [2023-03-31 22:43:43,403 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47f04438 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:43:43, skipping insertion in model container [2023-03-31 22:43:43,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:43:43" (2/3) ... [2023-03-31 22:43:43,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47f04438 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:43:43, skipping insertion in model container [2023-03-31 22:43:43,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:43:43" (3/3) ... [2023-03-31 22:43:43,405 INFO L112 eAbstractionObserver]: Analyzing ICFG drift_tenth.c [2023-03-31 22:43:43,437 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:43:43,437 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:43:43,491 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:43:43,510 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;@37b9e0e7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:43:43,510 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:43:43,525 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 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) [2023-03-31 22:43:43,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-03-31 22:43:43,531 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:43:43,531 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:43:43,532 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:43:43,536 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:43:43,536 INFO L85 PathProgramCache]: Analyzing trace with hash -970898460, now seen corresponding path program 1 times [2023-03-31 22:43:43,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:43:43,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309228140] [2023-03-31 22:43:43,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:43:43,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:43:43,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:43:43,744 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 22:43:43,745 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:43:43,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309228140] [2023-03-31 22:43:43,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309228140] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:43:43,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:43:43,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-31 22:43:43,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647704671] [2023-03-31 22:43:43,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:43:43,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-31 22:43:43,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:43:43,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-31 22:43:43,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-31 22:43:43,785 INFO L87 Difference]: Start difference. First operand has 17 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:43:43,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:43:43,833 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2023-03-31 22:43:43,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-31 22:43:43,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-03-31 22:43:43,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:43:43,840 INFO L225 Difference]: With dead ends: 29 [2023-03-31 22:43:43,840 INFO L226 Difference]: Without dead ends: 12 [2023-03-31 22:43:43,843 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 22:43:43,846 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:43:43,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 22:43:43,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-03-31 22:43:43,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-03-31 22:43:43,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:43:43,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2023-03-31 22:43:43,872 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2023-03-31 22:43:43,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:43:43,872 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2023-03-31 22:43:43,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:43:43,872 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2023-03-31 22:43:43,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-03-31 22:43:43,873 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:43:43,873 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:43:43,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:43:43,874 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:43:43,875 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:43:43,875 INFO L85 PathProgramCache]: Analyzing trace with hash -112983566, now seen corresponding path program 1 times [2023-03-31 22:43:43,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:43:43,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107739663] [2023-03-31 22:43:43,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:43:43,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:43:43,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:43:43,945 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 22:43:43,945 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:43:43,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107739663] [2023-03-31 22:43:43,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107739663] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:43:43,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215494838] [2023-03-31 22:43:43,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:43:43,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:43:43,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:43:43,950 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 22:43:43,974 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 22:43:44,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:43:44,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-31 22:43:44,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:43:44,050 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 22:43:44,050 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:43:44,080 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 22:43:44,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215494838] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:43:44,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [849429086] [2023-03-31 22:43:44,099 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-03-31 22:43:44,099 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:43:44,102 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:43:44,107 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:43:44,108 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:43:44,216 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 22:43:44,269 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-03-31 22:43:44,279 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 22:43:44,290 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:43:44,452 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '152#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 22:43:44,454 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 22:43:44,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 22:43:44,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-03-31 22:43:44,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962946238] [2023-03-31 22:43:44,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 22:43:44,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-03-31 22:43:44,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:43:44,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-03-31 22:43:44,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2023-03-31 22:43:44,465 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:43:44,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:43:44,487 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2023-03-31 22:43:44,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 22:43:44,487 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-03-31 22:43:44,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:43:44,488 INFO L225 Difference]: With dead ends: 20 [2023-03-31 22:43:44,488 INFO L226 Difference]: Without dead ends: 15 [2023-03-31 22:43:44,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2023-03-31 22:43:44,491 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:43:44,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 22:43:44,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-03-31 22:43:44,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-03-31 22:43:44,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:43:44,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2023-03-31 22:43:44,501 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2023-03-31 22:43:44,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:43:44,501 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2023-03-31 22:43:44,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:43:44,502 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2023-03-31 22:43:44,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-03-31 22:43:44,503 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:43:44,503 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:43:44,517 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 22:43:44,710 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 22:43:44,710 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:43:44,711 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:43:44,711 INFO L85 PathProgramCache]: Analyzing trace with hash -672704668, now seen corresponding path program 2 times [2023-03-31 22:43:44,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:43:44,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148735529] [2023-03-31 22:43:44,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:43:44,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:43:44,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:43:44,849 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:43:44,849 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:43:44,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148735529] [2023-03-31 22:43:44,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148735529] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:43:44,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924663298] [2023-03-31 22:43:44,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 22:43:44,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:43:44,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:43:44,852 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 22:43:44,869 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 22:43:44,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-31 22:43:44,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 22:43:44,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 22:43:44,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:43:44,930 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:43:44,930 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:43:45,004 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:43:45,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924663298] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:43:45,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [193638507] [2023-03-31 22:43:45,012 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-03-31 22:43:45,013 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:43:45,013 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:43:45,013 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:43:45,013 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:43:45,066 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 8 for LOIs [2023-03-31 22:43:45,095 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 13 for LOIs [2023-03-31 22:43:45,109 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 22:43:45,117 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:43:45,260 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '313#(and (= |__VERIFIER_assert_#in~cond| 0) (= __VERIFIER_assert_~cond 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 22:43:45,260 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 22:43:45,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 22:43:45,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-03-31 22:43:45,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771079214] [2023-03-31 22:43:45,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 22:43:45,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-03-31 22:43:45,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:43:45,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-03-31 22:43:45,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2023-03-31 22:43:45,263 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:43:45,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:43:45,287 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2023-03-31 22:43:45,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-03-31 22:43:45,288 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-03-31 22:43:45,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:43:45,289 INFO L225 Difference]: With dead ends: 26 [2023-03-31 22:43:45,290 INFO L226 Difference]: Without dead ends: 21 [2023-03-31 22:43:45,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2023-03-31 22:43:45,293 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:43:45,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 22:43:45,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-03-31 22:43:45,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-03-31 22:43:45,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:43:45,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2023-03-31 22:43:45,305 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 14 [2023-03-31 22:43:45,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:43:45,306 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2023-03-31 22:43:45,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:43:45,306 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2023-03-31 22:43:45,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-03-31 22:43:45,307 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:43:45,307 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:43:45,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 22:43:45,512 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 22:43:45,513 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:43:45,513 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:43:45,513 INFO L85 PathProgramCache]: Analyzing trace with hash -1848529756, now seen corresponding path program 3 times [2023-03-31 22:43:45,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:43:45,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289703393] [2023-03-31 22:43:45,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:43:45,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:43:45,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-03-31 22:43:45,534 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-03-31 22:43:45,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-03-31 22:43:45,558 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-03-31 22:43:45,558 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-03-31 22:43:45,559 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-03-31 22:43:45,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 22:43:45,563 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1] [2023-03-31 22:43:45,566 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-03-31 22:43:45,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.03 10:43:45 BoogieIcfgContainer [2023-03-31 22:43:45,583 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-03-31 22:43:45,583 INFO L158 Benchmark]: Toolchain (without parser) took 2633.82ms. Allocated memory is still 259.0MB. Free memory was 213.8MB in the beginning and 148.4MB in the end (delta: 65.4MB). Peak memory consumption was 65.9MB. Max. memory is 8.0GB. [2023-03-31 22:43:45,583 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 175.1MB. Free memory is still 126.6MB. There was no memory consumed. Max. memory is 8.0GB. [2023-03-31 22:43:45,584 INFO L158 Benchmark]: CACSL2BoogieTranslator took 184.92ms. Allocated memory is still 259.0MB. Free memory was 213.4MB in the beginning and 203.7MB in the end (delta: 9.6MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2023-03-31 22:43:45,584 INFO L158 Benchmark]: Boogie Preprocessor took 24.98ms. Allocated memory is still 259.0MB. Free memory was 203.7MB in the beginning and 202.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-03-31 22:43:45,584 INFO L158 Benchmark]: RCFGBuilder took 234.44ms. Allocated memory is still 259.0MB. Free memory was 202.3MB in the beginning and 191.4MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-03-31 22:43:45,584 INFO L158 Benchmark]: TraceAbstraction took 2182.74ms. Allocated memory is still 259.0MB. Free memory was 190.7MB in the beginning and 148.4MB in the end (delta: 42.4MB). Peak memory consumption was 42.8MB. Max. memory is 8.0GB. [2023-03-31 22:43:45,585 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 175.1MB. Free memory is still 126.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 184.92ms. Allocated memory is still 259.0MB. Free memory was 213.4MB in the beginning and 203.7MB in the end (delta: 9.6MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 24.98ms. Allocated memory is still 259.0MB. Free memory was 203.7MB in the beginning and 202.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 234.44ms. Allocated memory is still 259.0MB. Free memory was 202.3MB in the beginning and 191.4MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 2182.74ms. Allocated memory is still 259.0MB. Free memory was 190.7MB in the beginning and 148.4MB in the end (delta: 42.4MB). Peak memory consumption was 42.8MB. 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 - UnprovableResult [Line: 6]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryDOUBLEComparisonOperation at line 17, overapproximation of someBinaryArithmeticFLOAToperation at line 15. Possible FailurePath: [L10] float tick = 1.f / 10.f; [L11] float time = 0.f; [L12] int i; [L14] i = 0 VAL [i=0, time=0] [L14] COND TRUE i < 10 [L15] time += tick [L14] i++ VAL [i=1] [L14] COND TRUE i < 10 [L15] time += tick [L14] i++ VAL [i=2] [L14] COND TRUE i < 10 [L15] time += tick [L14] i++ VAL [i=3] [L14] COND TRUE i < 10 [L15] time += tick [L14] i++ VAL [i=4] [L14] COND TRUE i < 10 [L15] time += tick [L14] i++ VAL [i=5] [L14] COND TRUE i < 10 [L15] time += tick [L14] i++ VAL [i=6] [L14] COND TRUE i < 10 [L15] time += tick [L14] i++ VAL [i=7] [L14] COND TRUE i < 10 [L15] time += tick [L14] i++ VAL [i=8] [L14] COND TRUE i < 10 [L15] time += tick [L14] i++ VAL [i=9] [L14] COND TRUE i < 10 [L15] time += tick [L14] i++ VAL [i=10] [L14] COND FALSE !(i < 10) VAL [i=10] [L17] CALL __VERIFIER_assert(time != 1.0) VAL [\old(cond)=0] [L6] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L6] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.1s, OverallIterations: 4, TraceHistogramMax: 10, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 62 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 33 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 34 IncrementalHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 29 mSDtfsCounter, 34 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 87 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=3, InterpolantAutomatonStates: 21, 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, 3 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 80 NumberOfCodeBlocks, 80 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 78 ConstructedInterpolants, 0 QuantifiedInterpolants, 122 SizeOfPredicates, 0 NumberOfNonLiveVariables, 119 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/33 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 RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-03-31 22:43:45,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...