/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/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/float-benchs/filter2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-02-01 00:15:14,044 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-01 00:15:14,046 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-01 00:15:14,102 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-01 00:15:14,143 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-01 00:15:14,144 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-01 00:15:14,145 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-01 00:15:14,146 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-01 00:15:14,160 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-01 00:15:14,160 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-01 00:15:14,162 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-01 00:15:14,162 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-01 00:15:14,162 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-01 00:15:14,162 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-01 00:15:14,162 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-01 00:15:14,162 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-01 00:15:14,163 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-01 00:15:14,163 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-01 00:15:14,164 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-01 00:15:14,164 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-01 00:15:14,164 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-01 00:15:14,164 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-01 00:15:14,164 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-01 00:15:14,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-01 00:15:14,164 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-01 00:15:14,164 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-01 00:15:14,165 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-01 00:15:14,165 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-01 00:15:14,165 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-01 00:15:14,408 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-01 00:15:14,432 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-01 00:15:14,434 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-01 00:15:14,435 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-01 00:15:14,436 INFO L275 PluginConnector]: CDTParser initialized [2022-02-01 00:15:14,437 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/filter2.c [2022-02-01 00:15:14,492 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d236761d6/126c45ef625342ef96859996a970132b/FLAGc04c095e8 [2022-02-01 00:15:14,860 INFO L306 CDTParser]: Found 1 translation units. [2022-02-01 00:15:14,862 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/filter2.c [2022-02-01 00:15:14,876 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d236761d6/126c45ef625342ef96859996a970132b/FLAGc04c095e8 [2022-02-01 00:15:14,885 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d236761d6/126c45ef625342ef96859996a970132b [2022-02-01 00:15:14,887 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-01 00:15:14,888 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-01 00:15:14,890 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-01 00:15:14,891 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-01 00:15:14,893 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-01 00:15:14,893 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.02 12:15:14" (1/1) ... [2022-02-01 00:15:14,894 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@82bcd29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:15:14, skipping insertion in model container [2022-02-01 00:15:14,894 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.02 12:15:14" (1/1) ... [2022-02-01 00:15:14,900 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-01 00:15:14,913 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-01 00:15:15,076 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/filter2.c[652,665] [2022-02-01 00:15:15,110 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-01 00:15:15,121 INFO L203 MainTranslator]: Completed pre-run [2022-02-01 00:15:15,133 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/filter2.c[652,665] [2022-02-01 00:15:15,142 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-01 00:15:15,158 INFO L208 MainTranslator]: Completed translation [2022-02-01 00:15:15,159 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:15:15 WrapperNode [2022-02-01 00:15:15,159 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-01 00:15:15,161 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-01 00:15:15,161 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-01 00:15:15,161 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-01 00:15:15,172 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:15:15" (1/1) ... [2022-02-01 00:15:15,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:15:15" (1/1) ... [2022-02-01 00:15:15,179 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:15:15" (1/1) ... [2022-02-01 00:15:15,180 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:15:15" (1/1) ... [2022-02-01 00:15:15,192 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:15:15" (1/1) ... [2022-02-01 00:15:15,197 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:15:15" (1/1) ... [2022-02-01 00:15:15,198 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:15:15" (1/1) ... [2022-02-01 00:15:15,204 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-01 00:15:15,205 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-01 00:15:15,206 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-01 00:15:15,207 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-01 00:15:15,208 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:15:15" (1/1) ... [2022-02-01 00:15:15,214 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-01 00:15:15,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-01 00:15:15,241 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) [2022-02-01 00:15:15,264 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 [2022-02-01 00:15:15,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-01 00:15:15,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-01 00:15:15,284 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-01 00:15:15,284 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-01 00:15:15,284 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-01 00:15:15,285 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-01 00:15:15,285 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-01 00:15:15,285 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-01 00:15:15,285 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-01 00:15:15,285 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-01 00:15:15,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2022-02-01 00:15:15,286 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-01 00:15:15,286 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-01 00:15:15,286 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-01 00:15:15,286 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-01 00:15:15,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-01 00:15:15,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-01 00:15:15,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-01 00:15:15,288 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-01 00:15:15,288 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-01 00:15:15,340 INFO L234 CfgBuilder]: Building ICFG [2022-02-01 00:15:15,341 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-01 00:15:15,458 INFO L275 CfgBuilder]: Performing block encoding [2022-02-01 00:15:15,480 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-01 00:15:15,480 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-01 00:15:15,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.02 12:15:15 BoogieIcfgContainer [2022-02-01 00:15:15,482 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-01 00:15:15,484 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-01 00:15:15,484 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-01 00:15:15,499 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-01 00:15:15,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.02 12:15:14" (1/3) ... [2022-02-01 00:15:15,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8fe3702 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.02 12:15:15, skipping insertion in model container [2022-02-01 00:15:15,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:15:15" (2/3) ... [2022-02-01 00:15:15,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8fe3702 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.02 12:15:15, skipping insertion in model container [2022-02-01 00:15:15,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.02 12:15:15" (3/3) ... [2022-02-01 00:15:15,502 INFO L111 eAbstractionObserver]: Analyzing ICFG filter2.c [2022-02-01 00:15:15,506 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-01 00:15:15,507 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-01 00:15:15,549 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-01 00:15:15,557 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=QVASR [2022-02-01 00:15:15,558 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-01 00:15:15,570 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-01 00:15:15,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-01 00:15:15,580 INFO L506 BasicCegarLoop]: Found error trace [2022-02-01 00:15:15,580 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-01 00:15:15,581 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-01 00:15:15,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-01 00:15:15,585 INFO L85 PathProgramCache]: Analyzing trace with hash -1164239454, now seen corresponding path program 1 times [2022-02-01 00:15:15,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-01 00:15:15,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [75332025] [2022-02-01 00:15:15,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-01 00:15:15,605 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-01 00:15:15,655 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-01 00:15:15,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-01 00:15:15,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-01 00:15:15,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-01 00:15:15,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-01 00:15:15,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-01 00:15:15,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-02-01 00:15:15,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-01 00:15:15,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-02-01 00:15:15,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-01 00:15:15,872 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-01 00:15:15,874 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-01 00:15:15,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [75332025] [2022-02-01 00:15:15,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [75332025] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-01 00:15:15,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-01 00:15:15,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-01 00:15:15,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680888576] [2022-02-01 00:15:15,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-01 00:15:15,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-01 00:15:15,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-01 00:15:15,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-01 00:15:15,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-01 00:15:15,919 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-01 00:15:15,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-01 00:15:15,997 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2022-02-01 00:15:15,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-01 00:15:16,000 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-02-01 00:15:16,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-01 00:15:16,007 INFO L225 Difference]: With dead ends: 51 [2022-02-01 00:15:16,007 INFO L226 Difference]: Without dead ends: 24 [2022-02-01 00:15:16,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-01 00:15:16,013 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 16 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-01 00:15:16,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 30 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-01 00:15:16,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-02-01 00:15:16,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-02-01 00:15:16,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-01 00:15:16,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-02-01 00:15:16,046 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 28 [2022-02-01 00:15:16,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-01 00:15:16,047 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-02-01 00:15:16,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-01 00:15:16,047 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-02-01 00:15:16,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-01 00:15:16,049 INFO L506 BasicCegarLoop]: Found error trace [2022-02-01 00:15:16,049 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-01 00:15:16,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-01 00:15:16,050 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-01 00:15:16,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-01 00:15:16,050 INFO L85 PathProgramCache]: Analyzing trace with hash 223869088, now seen corresponding path program 1 times [2022-02-01 00:15:16,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-01 00:15:16,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894121202] [2022-02-01 00:15:16,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-01 00:15:16,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-01 00:15:16,054 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-01 00:15:16,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-01 00:15:16,093 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-01 00:15:16,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-01 00:15:16,129 INFO L133 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2022-02-01 00:15:16,129 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-01 00:15:16,132 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-01 00:15:16,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-01 00:15:16,136 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2022-02-01 00:15:16,138 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-01 00:15:16,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.02 12:15:16 BoogieIcfgContainer [2022-02-01 00:15:16,148 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-01 00:15:16,149 INFO L158 Benchmark]: Toolchain (without parser) took 1259.99ms. Allocated memory was 185.6MB in the beginning and 267.4MB in the end (delta: 81.8MB). Free memory was 131.3MB in the beginning and 197.2MB in the end (delta: -65.9MB). Peak memory consumption was 16.4MB. Max. memory is 8.0GB. [2022-02-01 00:15:16,149 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 185.6MB. Free memory is still 147.5MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-01 00:15:16,149 INFO L158 Benchmark]: CACSL2BoogieTranslator took 268.80ms. Allocated memory was 185.6MB in the beginning and 267.4MB in the end (delta: 81.8MB). Free memory was 131.1MB in the beginning and 239.7MB in the end (delta: -108.5MB). Peak memory consumption was 10.2MB. Max. memory is 8.0GB. [2022-02-01 00:15:16,150 INFO L158 Benchmark]: Boogie Preprocessor took 43.35ms. Allocated memory is still 267.4MB. Free memory was 239.7MB in the beginning and 238.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-01 00:15:16,150 INFO L158 Benchmark]: RCFGBuilder took 276.99ms. Allocated memory is still 267.4MB. Free memory was 238.1MB in the beginning and 227.1MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-02-01 00:15:16,151 INFO L158 Benchmark]: TraceAbstraction took 663.87ms. Allocated memory is still 267.4MB. Free memory was 226.5MB in the beginning and 197.2MB in the end (delta: 29.4MB). Peak memory consumption was 29.4MB. Max. memory is 8.0GB. [2022-02-01 00:15:16,153 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 185.6MB. Free memory is still 147.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 268.80ms. Allocated memory was 185.6MB in the beginning and 267.4MB in the end (delta: 81.8MB). Free memory was 131.1MB in the beginning and 239.7MB in the end (delta: -108.5MB). Peak memory consumption was 10.2MB. Max. memory is 8.0GB. * Boogie Preprocessor took 43.35ms. Allocated memory is still 267.4MB. Free memory was 239.7MB in the beginning and 238.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 276.99ms. Allocated memory is still 267.4MB. Free memory was 238.1MB in the beginning and 227.1MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 663.87ms. Allocated memory is still 267.4MB. Free memory was 226.5MB in the beginning and 197.2MB in the end (delta: 29.4MB). 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: 17]: 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 44, overapproximation of to_real at line 30, overapproximation of someBinaryArithmeticDOUBLEoperation at line 42. Possible FailurePath: [L22] double E, E0, E1, S0, S1, S; [L23] int i; [L25] E = __VERIFIER_nondet_double() [L26] E0 = __VERIFIER_nondet_double() [L27] CALL assume_abort_if_not(E >= 0. && E <= 1.) [L15] COND FALSE !(!cond) [L27] RET assume_abort_if_not(E >= 0. && E <= 1.) [L28] CALL assume_abort_if_not(E0 >= 0. && E0 <= 1.) [L15] COND FALSE !(!cond) [L28] RET assume_abort_if_not(E0 >= 0. && E0 <= 1.) [L30] S0 = 0 [L31] S = 0 [L33] i = 0 [L33] COND TRUE i <= 1000000 [L34] E1 = E0 [L35] E0 = E [L37] E = __VERIFIER_nondet_double() [L38] CALL assume_abort_if_not(E >= 0. && E <= 1.) [L15] COND FALSE !(!cond) [L38] RET assume_abort_if_not(E >= 0. && E <= 1.) [L40] S1 = S0 [L41] S0 = S [L42] S = 0.7*E - E0*1.3 + E1*1.1 + S0*1.4 - S1*0.7 [L44] CALL __VERIFIER_assert(S >= -4. && S <= 4.) [L17] COND TRUE !(cond) [L17] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 20 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 16 mSDsluCounter, 30 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6 IncrementalHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 27 mSDtfsCounter, 6 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred 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 [2022-02-01 00:15:16,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...