/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/float-benchs/filter_iir.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 00:42:01,577 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 00:42:01,580 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 00:42:01,618 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-02 00:42:01,668 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 00:42:01,694 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 00:42:01,694 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 00:42:01,695 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 00:42:01,695 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 00:42:01,696 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 00:42:01,696 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 00:42:01,696 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 00:42:01,697 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 00:42:01,697 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 00:42:01,697 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 00:42:01,698 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 00:42:01,698 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 00:42:01,698 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 00:42:01,698 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 00:42:01,698 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 00:42:01,699 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 00:42:01,699 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 00:42:01,699 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 00:42:01,699 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 00:42:01,699 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 00:42:01,699 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 00:42:01,699 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 00:42:01,700 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 00:42:01,700 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 00:42:01,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 00:42:01,700 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 00:42:01,700 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 00:42:01,701 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 00:42:01,701 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 00:42:01,701 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 00:42:01,701 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 00:42:01,701 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 00:42:01,701 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 00:42:01,702 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 00:42:01,702 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 00:42:01,702 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 00:42:01,922 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 00:42:01,947 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 00:42:01,949 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 00:42:01,950 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 00:42:01,950 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 00:42:01,951 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/filter_iir.c [2023-04-02 00:42:03,034 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 00:42:03,232 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 00:42:03,232 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/filter_iir.c [2023-04-02 00:42:03,238 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28126d408/e2d357e9cba44a7b946b4c9553585fdb/FLAG4421a5c7b [2023-04-02 00:42:03,252 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/28126d408/e2d357e9cba44a7b946b4c9553585fdb [2023-04-02 00:42:03,255 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 00:42:03,256 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 00:42:03,258 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 00:42:03,259 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 00:42:03,261 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 00:42:03,262 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 12:42:03" (1/1) ... [2023-04-02 00:42:03,263 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41cc82db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:42:03, skipping insertion in model container [2023-04-02 00:42:03,263 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 12:42:03" (1/1) ... [2023-04-02 00:42:03,269 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 00:42:03,284 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 00:42:03,392 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/filter_iir.c[583,596] [2023-04-02 00:42:03,411 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 00:42:03,422 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 00:42:03,431 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/filter_iir.c[583,596] [2023-04-02 00:42:03,441 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 00:42:03,455 INFO L208 MainTranslator]: Completed translation [2023-04-02 00:42:03,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:42:03 WrapperNode [2023-04-02 00:42:03,456 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 00:42:03,456 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 00:42:03,456 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 00:42:03,456 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 00:42:03,464 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:42:03" (1/1) ... [2023-04-02 00:42:03,465 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:42:03" (1/1) ... [2023-04-02 00:42:03,471 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:42:03" (1/1) ... [2023-04-02 00:42:03,472 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:42:03" (1/1) ... [2023-04-02 00:42:03,482 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:42:03" (1/1) ... [2023-04-02 00:42:03,485 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:42:03" (1/1) ... [2023-04-02 00:42:03,487 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:42:03" (1/1) ... [2023-04-02 00:42:03,488 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:42:03" (1/1) ... [2023-04-02 00:42:03,490 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 00:42:03,491 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 00:42:03,491 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 00:42:03,491 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 00:42:03,492 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:42:03" (1/1) ... [2023-04-02 00:42:03,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 00:42:03,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 00:42:03,525 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 00:42:03,532 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 00:42:03,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 00:42:03,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 00:42:03,563 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 00:42:03,563 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-02 00:42:03,563 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 00:42:03,563 INFO L138 BoogieDeclarations]: Found implementation of procedure iir4 [2023-04-02 00:42:03,563 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 00:42:03,563 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 00:42:03,563 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 00:42:03,564 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 00:42:03,564 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 00:42:03,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2023-04-02 00:42:03,564 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-02 00:42:03,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 00:42:03,564 INFO L130 BoogieDeclarations]: Found specification of procedure iir4 [2023-04-02 00:42:03,564 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-04-02 00:42:03,564 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2023-04-02 00:42:03,565 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 00:42:03,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 00:42:03,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 00:42:03,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2023-04-02 00:42:03,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 00:42:03,565 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 00:42:03,565 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 00:42:03,565 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 00:42:03,694 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 00:42:03,696 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 00:42:04,016 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 00:42:04,021 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 00:42:04,022 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 00:42:04,023 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 12:42:04 BoogieIcfgContainer [2023-04-02 00:42:04,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 00:42:04,026 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 00:42:04,026 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 00:42:04,028 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 00:42:04,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 12:42:03" (1/3) ... [2023-04-02 00:42:04,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@507e649d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 12:42:04, skipping insertion in model container [2023-04-02 00:42:04,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 12:42:03" (2/3) ... [2023-04-02 00:42:04,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@507e649d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 12:42:04, skipping insertion in model container [2023-04-02 00:42:04,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 12:42:04" (3/3) ... [2023-04-02 00:42:04,031 INFO L112 eAbstractionObserver]: Analyzing ICFG filter_iir.c [2023-04-02 00:42:04,046 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 00:42:04,047 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 00:42:04,085 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 00:42:04,090 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;@6ae1c299, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 00:42:04,091 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 00:42:04,094 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-02 00:42:04,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-02 00:42:04,100 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:42:04,101 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:42:04,101 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:42:04,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:42:04,106 INFO L85 PathProgramCache]: Analyzing trace with hash 2034824645, now seen corresponding path program 1 times [2023-04-02 00:42:04,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:42:04,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759285305] [2023-04-02 00:42:04,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:42:04,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:42:04,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:42:04,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 00:42:04,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:42:04,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2023-04-02 00:42:04,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:42:04,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2023-04-02 00:42:04,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 00:42:04,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 00:42:04,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 00:42:04,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759285305] [2023-04-02 00:42:04,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759285305] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 00:42:04,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 00:42:04,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 00:42:04,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150674991] [2023-04-02 00:42:04,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 00:42:04,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 00:42:04,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 00:42:04,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 00:42:04,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 00:42:04,585 INFO L87 Difference]: Start difference. First operand has 33 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 22 states have internal predecessors, (28), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (5), 4 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 00:42:04,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 00:42:04,818 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2023-04-02 00:42:04,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 00:42:04,821 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (5), 4 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 24 [2023-04-02 00:42:04,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 00:42:04,827 INFO L225 Difference]: With dead ends: 55 [2023-04-02 00:42:04,827 INFO L226 Difference]: Without dead ends: 28 [2023-04-02 00:42:04,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 00:42:04,835 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 32 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 00:42:04,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 3 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 00:42:04,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-02 00:42:04,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-04-02 00:42:04,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-02 00:42:04,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2023-04-02 00:42:04,880 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 24 [2023-04-02 00:42:04,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 00:42:04,880 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2023-04-02 00:42:04,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (5), 4 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 00:42:04,881 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2023-04-02 00:42:04,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-02 00:42:04,882 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 00:42:04,882 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 00:42:04,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 00:42:04,882 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 00:42:04,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 00:42:04,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1023707395, now seen corresponding path program 1 times [2023-04-02 00:42:04,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 00:42:04,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836079360] [2023-04-02 00:42:04,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 00:42:04,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 00:42:04,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-02 00:42:04,956 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-04-02 00:42:04,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-02 00:42:05,040 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-04-02 00:42:05,040 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-04-02 00:42:05,042 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-02 00:42:05,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 00:42:05,046 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-04-02 00:42:05,050 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-02 00:42:05,100 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.04 12:42:05 BoogieIcfgContainer [2023-04-02 00:42:05,100 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-02 00:42:05,100 INFO L158 Benchmark]: Toolchain (without parser) took 1844.32ms. Allocated memory is still 286.3MB. Free memory was 241.4MB in the beginning and 195.9MB in the end (delta: 45.5MB). Peak memory consumption was 46.9MB. Max. memory is 8.0GB. [2023-04-02 00:42:05,101 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 198.2MB. Free memory is still 145.6MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-02 00:42:05,102 INFO L158 Benchmark]: CACSL2BoogieTranslator took 197.36ms. Allocated memory is still 286.3MB. Free memory was 241.0MB in the beginning and 229.8MB in the end (delta: 11.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-04-02 00:42:05,103 INFO L158 Benchmark]: Boogie Preprocessor took 33.91ms. Allocated memory is still 286.3MB. Free memory was 229.8MB in the beginning and 227.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-04-02 00:42:05,103 INFO L158 Benchmark]: RCFGBuilder took 532.60ms. Allocated memory is still 286.3MB. Free memory was 227.7MB in the beginning and 211.0MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. [2023-04-02 00:42:05,104 INFO L158 Benchmark]: TraceAbstraction took 1074.33ms. Allocated memory is still 286.3MB. Free memory was 210.3MB in the beginning and 195.9MB in the end (delta: 14.4MB). Peak memory consumption was 16.5MB. Max. memory is 8.0GB. [2023-04-02 00:42:05,106 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 198.2MB. Free memory is still 145.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 197.36ms. Allocated memory is still 286.3MB. Free memory was 241.0MB in the beginning and 229.8MB in the end (delta: 11.2MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 33.91ms. Allocated memory is still 286.3MB. Free memory was 229.8MB in the beginning and 227.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 532.60ms. Allocated memory is still 286.3MB. Free memory was 227.7MB in the beginning and 211.0MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. * TraceAbstraction took 1074.33ms. Allocated memory is still 286.3MB. Free memory was 210.3MB in the beginning and 195.9MB in the end (delta: 14.4MB). Peak memory consumption was 16.5MB. 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: 13]: 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 54, overapproximation of to_real at line 16, overapproximation of someBinaryArithmeticDOUBLEoperation at line 28. Possible FailurePath: [L16] double A1[3] = { 1, 0.5179422053046, 1.0 }; [L17] double b1[2] = { 1.470767736573, 0.5522073405779 }; [L18] double A2[3] = { 1, 1.633101801841, 1.0 }; [L19] double b2[2] = { 1.742319554830, 0.820939679242 }; [L21] double D1[2], D2[2]; [L22] double P, X; VAL [A1={4:0}, A2={6:0}, D1={8:0}, D2={9:0}, P={10:0}, X={11:0}, \old(A1)={67:69}, \old(A2)={58:64}, \old(D1)={76:51}, \old(D2)={49:66}, \old(P)={72:56}, \old(X)={63:70}, \old(b1)={57:62}, \old(b2)={55:50}, b1={5:0}, b2={7:0}] [L43] D1[0] = 0. [L43] D1[1] = 0. [L44] D2[0] = 0. [L44] D2[1] = 0. [L45] P = 0. VAL [A1={4:0}, A2={6:0}, D1={8:0}, D2={9:0}, P={10:0}, X={11:0}, b1={5:0}, b2={7:0}] [L47] COND TRUE 1 [L49] X = __VERIFIER_nondet_double() [L50] EXPR \read(X) [L50] EXPR X >= -10. && X <= 10. [L50] EXPR \read(X) [L50] EXPR X >= -10. && X <= 10. VAL [A1={4:0}, A2={6:0}, D1={8:0}, D2={9:0}, P={10:0}, X={11:0}, \read(X)=93, \read(X)=93, b1={5:0}, b2={7:0}] [L50] CALL assume_abort_if_not(X >= -10. && X <= 10.) VAL [A1={4:0}, A2={6:0}, D1={8:0}, D2={9:0}, P={10:0}, X={11:0}, \old(cond)=1, b1={5:0}, b2={7:0}] [L11] COND FALSE !(!cond) VAL [A1={4:0}, A2={6:0}, D1={8:0}, D2={9:0}, P={10:0}, X={11:0}, \old(cond)=1, b1={5:0}, b2={7:0}, cond=1] [L50] RET assume_abort_if_not(X >= -10. && X <= 10.) VAL [A1={4:0}, A2={6:0}, D1={8:0}, D2={9:0}, P={10:0}, X >= -10. && X <= 10.=1, X={11:0}, \read(X)=93, \read(X)=93, b1={5:0}, b2={7:0}] [L52] CALL iir4(&X, &P) VAL [A1={4:0}, A2={6:0}, D1={8:0}, D2={9:0}, P={10:0}, X={11:0}, b1={5:0}, b2={7:0}, x={11:0}, y={10:0}] [L26] double x1, y1, t1, t2; [L28] EXPR \read(*x) [L28] x1 = 0.0117749388721091 * *x [L30] EXPR b1[0] [L30] EXPR D1[0] [L30] EXPR b1[1] [L30] EXPR D1[1] [L30] t1 = x1 + b1[0]*D1[0] - b1[1]*D1[1] [L31] EXPR A1[0] [L31] EXPR A1[1] [L31] EXPR D1[0] [L31] EXPR A1[2] [L31] EXPR D1[1] [L31] y1 = A1[0]*t1 - A1[1]*D1[0] + A1[2]*D1[1] [L32] EXPR D1[0] [L32] D1[1] = D1[0] [L33] D1[0] = t1 [L35] EXPR b2[0] [L35] EXPR D2[0] [L35] EXPR b2[1] [L35] EXPR D2[1] [L35] t2 = y1 + b2[0]*D2[0] - b2[1]*D2[1] [L36] EXPR A2[0] [L36] EXPR A2[1] [L36] EXPR D2[0] [L36] EXPR A2[2] [L36] EXPR D2[1] [L36] *y = A2[0]*t2 - A2[1]*D2[0] + A2[2]*D2[1] [L37] EXPR D2[0] [L37] D2[1] = D2[0] [L38] D2[0] = t2 VAL [A1={4:0}, A2={6:0}, D1={8:0}, D2={9:0}, P={10:0}, X={11:0}, b1={5:0}, b2={7:0}, t1=92, t2=94, x={11:0}, x={11:0}, y={10:0}, y={10:0}] [L52] RET iir4(&X, &P) VAL [A1={4:0}, A2={6:0}, D1={8:0}, D2={9:0}, P={10:0}, X={11:0}, b1={5:0}, b2={7:0}] [L54] EXPR \read(P) [L54] EXPR P >= -1e30 && P <= 1e30 [L54] EXPR \read(P) [L54] EXPR P >= -1e30 && P <= 1e30 VAL [A1={4:0}, A2={6:0}, D1={8:0}, D2={9:0}, P={10:0}, X={11:0}, \read(P)=91, \read(P)=91, b1={5:0}, b2={7:0}] [L54] CALL __VERIFIER_assert(P >= -1e30 && P <= 1e30) VAL [A1={4:0}, A2={6:0}, D1={8:0}, D2={9:0}, P={10:0}, X={11:0}, \old(cond)=0, b1={5:0}, b2={7:0}] [L13] COND TRUE !(cond) VAL [A1={4:0}, A2={6:0}, D1={8:0}, D2={9:0}, P={10:0}, X={11:0}, \old(cond)=0, b1={5:0}, b2={7:0}, cond=0] [L13] reach_error() VAL [A1={4:0}, A2={6:0}, D1={8:0}, D2={9:0}, P={10:0}, X={11:0}, \old(cond)=0, b1={5:0}, b2={7:0}, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 35 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 32 mSDsluCounter, 3 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 45 IncrementalHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 3 mSDtfsCounter, 45 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=0, InterpolantAutomatonStates: 5, 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, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 48 NumberOfCodeBlocks, 48 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 23 ConstructedInterpolants, 0 QuantifiedInterpolants, 83 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 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 [2023-04-02 00:42:05,123 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...