/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/float-benchs/sqrt_Newton_pseudoconstant.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 22:55:35,253 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 22:55:35,254 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 22:55:35,294 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 22:55:35,316 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 22:55:35,318 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 22:55:35,319 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 22:55:35,322 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 22:55:35,323 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 22:55:35,323 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 22:55:35,325 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 22:55:35,330 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 22:55:35,332 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 22:55:35,332 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 22:55:35,334 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 22:55:35,335 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 22:55:35,340 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 22:55:35,348 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 22:55:35,348 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 22:55:35,349 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 22:55:35,350 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-01-31 22:55:35,361 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 22:55:35,361 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 22:55:35,363 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 22:55:35,363 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 22:55:35,363 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 22:55:35,363 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 22:55:35,363 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 22:55:35,363 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 22:55:35,363 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 22:55:35,364 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 22:55:35,364 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 22:55:35,364 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 22:55:35,364 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 22:55:35,365 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 22:55:35,365 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 22:55:35,365 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 22:55:35,365 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 22:55:35,365 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 22:55:35,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 22:55:35,365 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 22:55:35,365 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 22:55:35,366 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 22:55:35,366 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 22:55:35,366 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 22:55:35,575 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 22:55:35,592 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 22:55:35,594 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 22:55:35,595 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 22:55:35,596 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 22:55:35,597 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/sqrt_Newton_pseudoconstant.c [2022-01-31 22:55:35,648 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/023ac6a25/9af7d99e158e42d0a6956abcd0eaf53c/FLAGc5a737e45 [2022-01-31 22:55:36,091 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 22:55:36,092 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/sqrt_Newton_pseudoconstant.c [2022-01-31 22:55:36,101 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/023ac6a25/9af7d99e158e42d0a6956abcd0eaf53c/FLAGc5a737e45 [2022-01-31 22:55:36,120 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/023ac6a25/9af7d99e158e42d0a6956abcd0eaf53c [2022-01-31 22:55:36,122 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 22:55:36,124 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 22:55:36,129 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 22:55:36,129 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 22:55:36,133 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 22:55:36,134 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:55:36" (1/1) ... [2022-01-31 22:55:36,134 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22982e32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:55:36, skipping insertion in model container [2022-01-31 22:55:36,135 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 10:55:36" (1/1) ... [2022-01-31 22:55:36,140 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 22:55:36,154 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 22:55:36,287 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/sqrt_Newton_pseudoconstant.c[557,570] [2022-01-31 22:55:36,317 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 22:55:36,324 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 22:55:36,337 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/sqrt_Newton_pseudoconstant.c[557,570] [2022-01-31 22:55:36,359 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 22:55:36,369 INFO L208 MainTranslator]: Completed translation [2022-01-31 22:55:36,370 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:55:36 WrapperNode [2022-01-31 22:55:36,370 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 22:55:36,372 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 22:55:36,372 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 22:55:36,372 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 22:55:36,383 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:55:36" (1/1) ... [2022-01-31 22:55:36,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:55:36" (1/1) ... [2022-01-31 22:55:36,390 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:55:36" (1/1) ... [2022-01-31 22:55:36,390 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:55:36" (1/1) ... [2022-01-31 22:55:36,402 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:55:36" (1/1) ... [2022-01-31 22:55:36,408 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:55:36" (1/1) ... [2022-01-31 22:55:36,413 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:55:36" (1/1) ... [2022-01-31 22:55:36,417 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 22:55:36,418 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 22:55:36,418 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 22:55:36,418 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 22:55:36,420 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:55:36" (1/1) ... [2022-01-31 22:55:36,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 22:55:36,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 22:55:36,452 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) [2022-01-31 22:55:36,478 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 [2022-01-31 22:55:36,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 22:55:36,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 22:55:36,497 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 22:55:36,497 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 22:55:36,498 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 22:55:36,498 INFO L138 BoogieDeclarations]: Found implementation of procedure SqrtR [2022-01-31 22:55:36,498 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 22:55:36,498 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 22:55:36,498 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 22:55:36,499 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 22:55:36,499 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 22:55:36,499 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2022-01-31 22:55:36,499 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 22:55:36,499 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 22:55:36,500 INFO L130 BoogieDeclarations]: Found specification of procedure SqrtR [2022-01-31 22:55:36,501 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 22:55:36,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 22:55:36,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 22:55:36,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 22:55:36,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 22:55:36,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 22:55:36,501 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 22:55:36,577 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 22:55:36,579 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 22:55:36,740 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 22:55:36,745 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 22:55:36,746 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 22:55:36,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:55:36 BoogieIcfgContainer [2022-01-31 22:55:36,747 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 22:55:36,748 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 22:55:36,749 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 22:55:36,774 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 22:55:36,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 10:55:36" (1/3) ... [2022-01-31 22:55:36,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d5cdfa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:55:36, skipping insertion in model container [2022-01-31 22:55:36,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 10:55:36" (2/3) ... [2022-01-31 22:55:36,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d5cdfa6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 10:55:36, skipping insertion in model container [2022-01-31 22:55:36,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 10:55:36" (3/3) ... [2022-01-31 22:55:36,777 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt_Newton_pseudoconstant.c [2022-01-31 22:55:36,781 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 22:55:36,782 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 22:55:36,838 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 22:55:36,846 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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, mLoopAccelerationTechnique=JORDAN [2022-01-31 22:55:36,847 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 22:55:36,867 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 23 states have internal predecessors, (30), 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) [2022-01-31 22:55:36,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 22:55:36,884 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:55:36,884 INFO L514 BasicCegarLoop]: 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, 1] [2022-01-31 22:55:36,885 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:55:36,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:55:36,891 INFO L85 PathProgramCache]: Analyzing trace with hash -335368346, now seen corresponding path program 1 times [2022-01-31 22:55:36,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:55:36,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [864676001] [2022-01-31 22:55:36,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:55:36,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:55:36,960 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:55:37,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:55:37,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 22:55:37,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:55:37,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 22:55:37,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:55:37,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-01-31 22:55:37,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 22:55:37,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 22:55:37,165 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 22:55:37,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [864676001] [2022-01-31 22:55:37,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [864676001] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 22:55:37,168 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 22:55:37,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 22:55:37,169 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442660824] [2022-01-31 22:55:37,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 22:55:37,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 22:55:37,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 22:55:37,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 22:55:37,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 22:55:37,207 INFO L87 Difference]: Start difference. First operand has 34 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 23 states have internal predecessors, (30), 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 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 22:55:37,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 22:55:37,284 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2022-01-31 22:55:37,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 22:55:37,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (5), 3 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 25 [2022-01-31 22:55:37,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 22:55:37,298 INFO L225 Difference]: With dead ends: 62 [2022-01-31 22:55:37,299 INFO L226 Difference]: Without dead ends: 29 [2022-01-31 22:55:37,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 22:55:37,306 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 23 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 22:55:37,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 36 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 22:55:37,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-01-31 22:55:37,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-01-31 22:55:37,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 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) [2022-01-31 22:55:37,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-01-31 22:55:37,347 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 25 [2022-01-31 22:55:37,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 22:55:37,348 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-01-31 22:55:37,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 22:55:37,348 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-01-31 22:55:37,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-31 22:55:37,350 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 22:55:37,350 INFO L514 BasicCegarLoop]: 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, 1] [2022-01-31 22:55:37,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 22:55:37,351 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 22:55:37,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 22:55:37,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1578413856, now seen corresponding path program 1 times [2022-01-31 22:55:37,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 22:55:37,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [463868548] [2022-01-31 22:55:37,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 22:55:37,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 22:55:37,358 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 22:55:37,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-31 22:55:37,398 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-01-31 22:55:37,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-01-31 22:55:37,436 INFO L133 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2022-01-31 22:55:37,436 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-01-31 22:55:37,441 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 22:55:37,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 22:55:37,448 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2022-01-31 22:55:37,452 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 22:55:37,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 10:55:37 BoogieIcfgContainer [2022-01-31 22:55:37,464 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 22:55:37,465 INFO L158 Benchmark]: Toolchain (without parser) took 1340.54ms. Allocated memory was 168.8MB in the beginning and 220.2MB in the end (delta: 51.4MB). Free memory was 117.0MB in the beginning and 150.8MB in the end (delta: -33.8MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. [2022-01-31 22:55:37,465 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 168.8MB. Free memory is still 133.2MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 22:55:37,466 INFO L158 Benchmark]: CACSL2BoogieTranslator took 241.67ms. Allocated memory was 168.8MB in the beginning and 220.2MB in the end (delta: 51.4MB). Free memory was 116.8MB in the beginning and 194.4MB in the end (delta: -77.6MB). Peak memory consumption was 9.5MB. Max. memory is 8.0GB. [2022-01-31 22:55:37,466 INFO L158 Benchmark]: Boogie Preprocessor took 45.86ms. Allocated memory is still 220.2MB. Free memory was 194.4MB in the beginning and 192.8MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 22:55:37,467 INFO L158 Benchmark]: RCFGBuilder took 328.87ms. Allocated memory is still 220.2MB. Free memory was 192.3MB in the beginning and 181.2MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-01-31 22:55:37,467 INFO L158 Benchmark]: TraceAbstraction took 716.03ms. Allocated memory is still 220.2MB. Free memory was 180.7MB in the beginning and 150.8MB in the end (delta: 29.9MB). Peak memory consumption was 29.4MB. Max. memory is 8.0GB. [2022-01-31 22:55:37,469 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 168.8MB. Free memory is still 133.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 241.67ms. Allocated memory was 168.8MB in the beginning and 220.2MB in the end (delta: 51.4MB). Free memory was 116.8MB in the beginning and 194.4MB in the end (delta: -77.6MB). Peak memory consumption was 9.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 45.86ms. Allocated memory is still 220.2MB. Free memory was 194.4MB in the beginning and 192.8MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 328.87ms. Allocated memory is still 220.2MB. Free memory was 192.3MB in the beginning and 181.2MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 716.03ms. Allocated memory is still 220.2MB. Free memory was 180.7MB in the beginning and 150.8MB in the end (delta: 29.9MB). Peak memory consumption was 29.4MB. 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 52, overapproximation of someUnaryDOUBLEoperation at line 25, overapproximation of someBinaryArithmeticDOUBLEoperation at line 37. Possible FailurePath: [L15] double _EPS = 1e-6; [L42] double d, dd, r; [L43] double epsilon = 1e-8; [L45] d = 1. [L45] COND TRUE d <= 20. [L47] dd = __VERIFIER_nondet_double() [L48] CALL assume_abort_if_not(dd >= d-epsilon && dd <= d+epsilon) [L11] COND FALSE !(!cond) [L48] RET assume_abort_if_not(dd >= d-epsilon && dd <= d+epsilon) [L50] CALL, EXPR SqrtR(dd) [L19] double xn, xnp1, residu, lsup, linf; [L20] int i, cond; [L21] COND TRUE Input <= 1.0 [L21] xn = 1.0 [L22] xnp1 = xn [L23] residu = 2.0*_EPS*(xn+xnp1) [L24] lsup = _EPS * (xn+xnp1) [L25] linf = -lsup [L26] cond = ((residu > lsup) || (residu < linf)) [L27] i = 0 [L28] COND FALSE !(\read(cond)) [L37] return 1.0 / xnp1; [L50] RET, EXPR SqrtR(dd) [L50] r = SqrtR(dd) [L52] CALL __VERIFIER_assert(r >= 0.9 && r <= 5.) [L13] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 26 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 23 mSDsluCounter, 36 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5 IncrementalHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 33 mSDtfsCounter, 5 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=0, InterpolantAutomatonStates: 3, 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: No data available, 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 [2022-01-31 22:55:37,510 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...