/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/nla-digbench/fermat1-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 01:47:17,157 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 01:47:17,158 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 01:47:17,192 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-02 01:47:17,206 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 01:47:17,208 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 01:47:17,209 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 01:47:17,210 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 01:47:17,211 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 01:47:17,211 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 01:47:17,212 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 01:47:17,217 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 01:47:17,218 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 01:47:17,219 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 01:47:17,219 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 01:47:17,220 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 01:47:17,227 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2023-04-02 01:47:17,229 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 01:47:17,230 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 01:47:17,231 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 01:47:17,231 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 01:47:17,232 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 01:47:17,232 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 01:47:17,232 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 01:47:17,232 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 01:47:17,233 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 01:47:17,233 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 01:47:17,234 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 01:47:17,235 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-02 01:47:17,257 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 01:47:17,257 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 01:47:17,258 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 01:47:17,258 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 01:47:17,259 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 01:47:17,259 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 01:47:17,259 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 01:47:17,259 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 01:47:17,260 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 01:47:17,260 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 01:47:17,260 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 01:47:17,260 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 01:47:17,261 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 01:47:17,261 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 01:47:17,261 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 01:47:17,261 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 01:47:17,261 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 01:47:17,261 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 01:47:17,261 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 01:47:17,261 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 01:47:17,261 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 01:47:17,261 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 01:47:17,262 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 01:47:17,262 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 01:47:17,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 01:47:17,262 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 01:47:17,262 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 01:47:17,262 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 01:47:17,263 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 01:47:17,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 01:47:17,263 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 01:47:17,263 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 01:47:17,263 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 01:47:17,263 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 01:47:17,263 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 01:47:17,263 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 01:47:17,424 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 01:47:17,448 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 01:47:17,450 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 01:47:17,451 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 01:47:17,451 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 01:47:17,452 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/fermat1-ll.c [2023-04-02 01:47:18,393 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 01:47:18,519 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 01:47:18,520 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/fermat1-ll.c [2023-04-02 01:47:18,524 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/970217602/2349e5bc703d46198f0db50bd284cb6a/FLAGe8431f070 [2023-04-02 01:47:18,536 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/970217602/2349e5bc703d46198f0db50bd284cb6a [2023-04-02 01:47:18,537 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 01:47:18,538 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 01:47:18,539 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 01:47:18,539 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 01:47:18,541 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 01:47:18,542 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:47:18" (1/1) ... [2023-04-02 01:47:18,542 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e0a01b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:47:18, skipping insertion in model container [2023-04-02 01:47:18,543 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:47:18" (1/1) ... [2023-04-02 01:47:18,547 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 01:47:18,556 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 01:47:18,635 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/nla-digbench/fermat1-ll.c[535,548] [2023-04-02 01:47:18,645 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 01:47:18,651 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 01:47:18,658 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/nla-digbench/fermat1-ll.c[535,548] [2023-04-02 01:47:18,663 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 01:47:18,671 INFO L208 MainTranslator]: Completed translation [2023-04-02 01:47:18,672 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:47:18 WrapperNode [2023-04-02 01:47:18,672 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 01:47:18,672 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 01:47:18,673 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 01:47:18,673 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 01:47:18,680 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:47:18" (1/1) ... [2023-04-02 01:47:18,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:47:18" (1/1) ... [2023-04-02 01:47:18,684 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:47:18" (1/1) ... [2023-04-02 01:47:18,684 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:47:18" (1/1) ... [2023-04-02 01:47:18,688 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:47:18" (1/1) ... [2023-04-02 01:47:18,690 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:47:18" (1/1) ... [2023-04-02 01:47:18,691 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:47:18" (1/1) ... [2023-04-02 01:47:18,691 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:47:18" (1/1) ... [2023-04-02 01:47:18,692 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 01:47:18,693 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 01:47:18,693 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 01:47:18,693 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 01:47:18,693 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:47:18" (1/1) ... [2023-04-02 01:47:18,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 01:47:18,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:47:18,714 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 01:47:18,718 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 01:47:18,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 01:47:18,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 01:47:18,741 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 01:47:18,741 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 01:47:18,741 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 01:47:18,741 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 01:47:18,741 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 01:47:18,741 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 01:47:18,741 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 01:47:18,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 01:47:18,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-02 01:47:18,742 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 01:47:18,742 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 01:47:18,742 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 01:47:18,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 01:47:18,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 01:47:18,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 01:47:18,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 01:47:18,742 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 01:47:18,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 01:47:18,784 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 01:47:18,785 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 01:47:18,916 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 01:47:18,920 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 01:47:18,920 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-02 01:47:18,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:47:18 BoogieIcfgContainer [2023-04-02 01:47:18,938 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 01:47:18,940 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 01:47:18,940 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 01:47:18,942 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 01:47:18,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 01:47:18" (1/3) ... [2023-04-02 01:47:18,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67e0bda7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:47:18, skipping insertion in model container [2023-04-02 01:47:18,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:47:18" (2/3) ... [2023-04-02 01:47:18,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67e0bda7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:47:18, skipping insertion in model container [2023-04-02 01:47:18,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:47:18" (3/3) ... [2023-04-02 01:47:18,944 INFO L112 eAbstractionObserver]: Analyzing ICFG fermat1-ll.c [2023-04-02 01:47:18,972 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 01:47:18,972 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 01:47:19,019 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 01:47:19,023 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@152ddcac, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 01:47:19,023 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 01:47:19,026 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-02 01:47:19,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-02 01:47:19,031 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:47:19,032 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:47:19,032 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:47:19,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:47:19,036 INFO L85 PathProgramCache]: Analyzing trace with hash -150104916, now seen corresponding path program 1 times [2023-04-02 01:47:19,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:47:19,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436443344] [2023-04-02 01:47:19,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:47:19,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:47:19,109 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 01:47:19,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [372425872] [2023-04-02 01:47:19,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:47:19,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:47:19,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:47:19,113 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 01:47:19,115 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 01:47:19,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:47:19,179 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 1 conjunts are in the unsatisfiable core [2023-04-02 01:47:19,183 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:47:19,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-04-02 01:47:19,198 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 01:47:19,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:47:19,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436443344] [2023-04-02 01:47:19,199 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 01:47:19,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372425872] [2023-04-02 01:47:19,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372425872] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:47:19,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:47:19,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-02 01:47:19,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627760954] [2023-04-02 01:47:19,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:47:19,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-02 01:47:19,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:47:19,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-02 01:47:19,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-02 01:47:19,225 INFO L87 Difference]: Start difference. First operand has 34 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:47:19,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:47:19,239 INFO L93 Difference]: Finished difference Result 61 states and 94 transitions. [2023-04-02 01:47:19,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-02 01:47:19,240 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2023-04-02 01:47:19,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:47:19,244 INFO L225 Difference]: With dead ends: 61 [2023-04-02 01:47:19,245 INFO L226 Difference]: Without dead ends: 29 [2023-04-02 01:47:19,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 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 01:47:19,249 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 01:47:19,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 01:47:19,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-04-02 01:47:19,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-04-02 01:47:19,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 01:47:19,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2023-04-02 01:47:19,281 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 22 [2023-04-02 01:47:19,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:47:19,281 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2023-04-02 01:47:19,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-04-02 01:47:19,282 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2023-04-02 01:47:19,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-04-02 01:47:19,284 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:47:19,284 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:47:19,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 01:47:19,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-04-02 01:47:19,489 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:47:19,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:47:19,489 INFO L85 PathProgramCache]: Analyzing trace with hash -521053945, now seen corresponding path program 1 times [2023-04-02 01:47:19,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:47:19,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998032044] [2023-04-02 01:47:19,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:47:19,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:47:19,506 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 01:47:19,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [549812000] [2023-04-02 01:47:19,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:47:19,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:47:19,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:47:19,509 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 01:47:19,511 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 01:47:19,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:47:19,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 01:47:19,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:47:19,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:47:19,688 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-02 01:47:19,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:47:19,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998032044] [2023-04-02 01:47:19,688 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 01:47:19,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549812000] [2023-04-02 01:47:19,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549812000] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:47:19,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:47:19,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 01:47:19,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804446369] [2023-04-02 01:47:19,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:47:19,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 01:47:19,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:47:19,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 01:47:19,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 01:47:19,690 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 01:47:21,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:47:25,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-04-02 01:47:25,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:47:25,117 INFO L93 Difference]: Finished difference Result 45 states and 56 transitions. [2023-04-02 01:47:25,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 01:47:25,118 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2023-04-02 01:47:25,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:47:25,119 INFO L225 Difference]: With dead ends: 45 [2023-04-02 01:47:25,119 INFO L226 Difference]: Without dead ends: 43 [2023-04-02 01:47:25,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-02 01:47:25,120 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 11 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2023-04-02 01:47:25,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 83 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2023-04-02 01:47:25,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-04-02 01:47:25,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2023-04-02 01:47:25,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-04-02 01:47:25,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2023-04-02 01:47:25,135 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 22 [2023-04-02 01:47:25,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:47:25,135 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2023-04-02 01:47:25,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-02 01:47:25,149 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2023-04-02 01:47:25,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-02 01:47:25,149 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:47:25,149 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:47:25,156 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 01:47:25,350 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,SelfDestructingSolverStorable1 [2023-04-02 01:47:25,350 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:47:25,351 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:47:25,351 INFO L85 PathProgramCache]: Analyzing trace with hash -773887245, now seen corresponding path program 1 times [2023-04-02 01:47:25,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:47:25,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719073795] [2023-04-02 01:47:25,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:47:25,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:47:25,360 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-04-02 01:47:25,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1287215183] [2023-04-02 01:47:25,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:47:25,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:47:25,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:47:25,361 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:47:25,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 01:47:25,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:47:25,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 13 conjunts are in the unsatisfiable core [2023-04-02 01:47:25,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:47:25,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:47:25,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:47:25,583 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:47:25,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:47:25,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719073795] [2023-04-02 01:47:25,584 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-04-02 01:47:25,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287215183] [2023-04-02 01:47:25,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287215183] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:47:25,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-02 01:47:25,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2023-04-02 01:47:25,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468051726] [2023-04-02 01:47:25,584 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-02 01:47:25,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-02 01:47:25,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:47:25,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-02 01:47:25,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-04-02 01:47:25,586 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-02 01:47:25,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:47:25,730 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2023-04-02 01:47:25,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-02 01:47:25,731 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 28 [2023-04-02 01:47:25,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:47:25,732 INFO L225 Difference]: With dead ends: 42 [2023-04-02 01:47:25,732 INFO L226 Difference]: Without dead ends: 0 [2023-04-02 01:47:25,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-04-02 01:47:25,733 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 15 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:47:25,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 126 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:47:25,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-04-02 01:47:25,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-04-02 01:47:25,734 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 01:47:25,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-04-02 01:47:25,734 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2023-04-02 01:47:25,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:47:25,734 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-04-02 01:47:25,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2023-04-02 01:47:25,734 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-04-02 01:47:25,734 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-04-02 01:47:25,736 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-02 01:47:25,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 01:47:25,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:47:25,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-04-02 01:47:27,148 INFO L899 garLoopResultBuilder]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2023-04-02 01:47:27,148 INFO L899 garLoopResultBuilder]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2023-04-02 01:47:27,148 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line 5) no Hoare annotation was computed. [2023-04-02 01:47:27,148 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 8 10) the Hoare annotation is: true [2023-04-02 01:47:27,148 INFO L899 garLoopResultBuilder]: For program point L9(line 9) no Hoare annotation was computed. [2023-04-02 01:47:27,148 INFO L899 garLoopResultBuilder]: For program point L9-2(lines 8 10) no Hoare annotation was computed. [2023-04-02 01:47:27,149 INFO L899 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 8 10) no Hoare annotation was computed. [2023-04-02 01:47:27,149 INFO L899 garLoopResultBuilder]: For program point mainEXIT(lines 19 57) no Hoare annotation was computed. [2023-04-02 01:47:27,149 INFO L902 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: true [2023-04-02 01:47:27,149 INFO L902 garLoopResultBuilder]: At program point L24-1(line 24) the Hoare annotation is: true [2023-04-02 01:47:27,149 INFO L895 garLoopResultBuilder]: At program point L33-2(lines 33 53) the Hoare annotation is: (let ((.cse0 (+ (* main_~v~0 2) (* main_~u~0 main_~u~0))) (.cse1 (* main_~v~0 main_~v~0)) (.cse2 (* main_~u~0 2)) (.cse3 (* main_~A~0 4))) (and (= .cse0 (+ .cse1 .cse2 .cse3 (* main_~r~0 4))) (= .cse0 (+ .cse1 .cse2 .cse3)))) [2023-04-02 01:47:27,149 INFO L895 garLoopResultBuilder]: At program point L46-1(lines 46 52) the Hoare annotation is: (= (+ (* main_~v~0 2) (* main_~u~0 main_~u~0)) (+ (* main_~v~0 main_~v~0) (* main_~u~0 2) (* main_~A~0 4) (* main_~r~0 4))) [2023-04-02 01:47:27,149 INFO L899 garLoopResultBuilder]: For program point mainFINAL(lines 19 57) no Hoare annotation was computed. [2023-04-02 01:47:27,149 INFO L895 garLoopResultBuilder]: At program point L46-2(lines 33 53) the Hoare annotation is: (= (+ (* main_~v~0 2) (* main_~u~0 main_~u~0)) (+ (* main_~v~0 main_~v~0) (* main_~u~0 2) (* main_~A~0 4) (* main_~r~0 4))) [2023-04-02 01:47:27,149 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 19 57) the Hoare annotation is: true [2023-04-02 01:47:27,149 INFO L895 garLoopResultBuilder]: At program point L38-2(lines 38 44) the Hoare annotation is: (= (+ (* main_~v~0 2) (* main_~u~0 main_~u~0)) (+ (* main_~v~0 main_~v~0) (* main_~u~0 2) (* main_~A~0 4) (* main_~r~0 4))) [2023-04-02 01:47:27,150 INFO L895 garLoopResultBuilder]: At program point L34(line 34) the Hoare annotation is: (= (+ (* main_~v~0 2) (* main_~u~0 main_~u~0)) (+ (* main_~v~0 main_~v~0) (* main_~u~0 2) (* main_~A~0 4) (* main_~r~0 4))) [2023-04-02 01:47:27,150 INFO L899 garLoopResultBuilder]: For program point L34-1(lines 33 53) no Hoare annotation was computed. [2023-04-02 01:47:27,150 INFO L899 garLoopResultBuilder]: For program point L26(line 26) no Hoare annotation was computed. [2023-04-02 01:47:27,150 INFO L899 garLoopResultBuilder]: For program point L55(line 55) no Hoare annotation was computed. [2023-04-02 01:47:27,150 INFO L895 garLoopResultBuilder]: At program point L47(line 47) the Hoare annotation is: (= (+ (* main_~v~0 2) (* main_~u~0 main_~u~0)) (+ (* main_~v~0 main_~v~0) (* main_~u~0 2) (* main_~A~0 4) (* main_~r~0 4))) [2023-04-02 01:47:27,150 INFO L899 garLoopResultBuilder]: For program point L47-1(lines 46 52) no Hoare annotation was computed. [2023-04-02 01:47:27,150 INFO L895 garLoopResultBuilder]: At program point L39(line 39) the Hoare annotation is: (= (+ (* main_~v~0 2) (* main_~u~0 main_~u~0)) (+ (* main_~v~0 main_~v~0) (* main_~u~0 2) (* main_~A~0 4) (* main_~r~0 4))) [2023-04-02 01:47:27,150 INFO L899 garLoopResultBuilder]: For program point L39-1(lines 38 44) no Hoare annotation was computed. [2023-04-02 01:47:27,150 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2023-04-02 01:47:27,150 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-04-02 01:47:27,150 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2023-04-02 01:47:27,150 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-04-02 01:47:27,150 INFO L902 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2023-04-02 01:47:27,151 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-04-02 01:47:27,151 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(line -1) the Hoare annotation is: true [2023-04-02 01:47:27,151 INFO L899 garLoopResultBuilder]: For program point L13(lines 13 14) no Hoare annotation was computed. [2023-04-02 01:47:27,151 INFO L899 garLoopResultBuilder]: For program point L12(lines 12 15) no Hoare annotation was computed. [2023-04-02 01:47:27,151 INFO L899 garLoopResultBuilder]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2023-04-02 01:47:27,151 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2023-04-02 01:47:27,151 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 11 17) the Hoare annotation is: true [2023-04-02 01:47:27,151 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2023-04-02 01:47:27,153 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-04-02 01:47:27,154 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-02 01:47:27,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.04 01:47:27 BoogieIcfgContainer [2023-04-02 01:47:27,165 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-02 01:47:27,165 INFO L158 Benchmark]: Toolchain (without parser) took 8627.14ms. Allocated memory is still 250.6MB. Free memory was 207.3MB in the beginning and 167.6MB in the end (delta: 39.6MB). Peak memory consumption was 41.2MB. Max. memory is 8.0GB. [2023-04-02 01:47:27,166 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 203.4MB. Free memory is still 149.5MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-02 01:47:27,166 INFO L158 Benchmark]: CACSL2BoogieTranslator took 133.33ms. Allocated memory is still 250.6MB. Free memory was 206.7MB in the beginning and 196.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-04-02 01:47:27,168 INFO L158 Benchmark]: Boogie Preprocessor took 19.76ms. Allocated memory is still 250.6MB. Free memory was 196.2MB in the beginning and 194.7MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-04-02 01:47:27,170 INFO L158 Benchmark]: RCFGBuilder took 245.69ms. Allocated memory is still 250.6MB. Free memory was 194.7MB in the beginning and 182.6MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-04-02 01:47:27,170 INFO L158 Benchmark]: TraceAbstraction took 8224.90ms. Allocated memory is still 250.6MB. Free memory was 182.1MB in the beginning and 167.6MB in the end (delta: 14.5MB). Peak memory consumption was 16.0MB. Max. memory is 8.0GB. [2023-04-02 01:47:27,171 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 203.4MB. Free memory is still 149.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 133.33ms. Allocated memory is still 250.6MB. Free memory was 206.7MB in the beginning and 196.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 19.76ms. Allocated memory is still 250.6MB. Free memory was 196.2MB in the beginning and 194.7MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 245.69ms. Allocated memory is still 250.6MB. Free memory was 194.7MB in the beginning and 182.6MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 8224.90ms. Allocated memory is still 250.6MB. Free memory was 182.1MB in the beginning and 167.6MB in the end (delta: 14.5MB). Peak memory consumption was 16.0MB. 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: 14]: 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 6 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 8.1s, OverallIterations: 3, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 5.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 31 SdHoareTripleChecker+Valid, 5.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 26 mSDsluCounter, 249 SdHoareTripleChecker+Invalid, 5.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 163 mSDsCounter, 11 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 151 IncrementalHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 11 mSolverCounterUnsat, 86 mSDtfsCounter, 151 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 100 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=2, InterpolantAutomatonStates: 13, 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, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 15 LocationsWithAnnotation, 27 PreInvPairs, 41 NumberOfFragments, 174 HoareAnnotationTreeSize, 27 FomulaSimplifications, 30 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 15 FomulaSimplificationsInter, 282 FormulaSimplificationTreeSizeReductionInter, 1.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 72 NumberOfCodeBlocks, 72 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 96 ConstructedInterpolants, 0 QuantifiedInterpolants, 265 SizeOfPredicates, 5 NumberOfNonLiveVariables, 248 ConjunctsInSsa, 26 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 18/20 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: 46]: Loop Invariant Derived loop invariant: v * 2 + u * u == v * v + u * 2 + A * 4 + r * 4 - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: v * 2 + u * u == v * v + u * 2 + A * 4 + r * 4 - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: v * 2 + u * u == v * v + u * 2 + A * 4 + r * 4 RESULT: Ultimate proved your program to be correct! [2023-04-02 01:47:27,192 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...