/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/filter_iir.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-02-01 00:15:22,600 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-01 00:15:22,613 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-01 00:15:22,713 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-01 00:15:22,764 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-01 00:15:22,765 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-01 00:15:22,765 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-01 00:15:22,766 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 00:15:22,777 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-01 00:15:22,777 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-01 00:15:22,792 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-01 00:15:22,793 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-01 00:15:22,793 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-01 00:15:22,793 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-01 00:15:22,793 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-01 00:15:22,793 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-01 00:15:22,793 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-01 00:15:22,793 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-01 00:15:22,794 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-01 00:15:22,794 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-01 00:15:22,794 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-01 00:15:22,794 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-01 00:15:22,794 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-01 00:15:22,794 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-01 00:15:22,794 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-01 00:15:22,794 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-01 00:15:22,794 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-01 00:15:22,795 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-01 00:15:22,795 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-01 00:15:23,126 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-01 00:15:23,150 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-01 00:15:23,161 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-01 00:15:23,164 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-01 00:15:23,164 INFO L275 PluginConnector]: CDTParser initialized [2022-02-01 00:15:23,165 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/filter_iir.c [2022-02-01 00:15:23,244 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/925f293e9/539aa0a5036446118d23e225d5297305/FLAG756522bcd [2022-02-01 00:15:23,903 INFO L306 CDTParser]: Found 1 translation units. [2022-02-01 00:15:23,904 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-benchs/filter_iir.c [2022-02-01 00:15:23,918 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/925f293e9/539aa0a5036446118d23e225d5297305/FLAG756522bcd [2022-02-01 00:15:23,945 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/925f293e9/539aa0a5036446118d23e225d5297305 [2022-02-01 00:15:23,947 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-01 00:15:23,949 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-01 00:15:23,952 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-01 00:15:23,952 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-01 00:15:23,954 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-01 00:15:23,955 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.02 12:15:23" (1/1) ... [2022-02-01 00:15:23,968 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fb57bd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:15:23, skipping insertion in model container [2022-02-01 00:15:23,968 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.02 12:15:23" (1/1) ... [2022-02-01 00:15:23,974 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-01 00:15:23,994 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-01 00:15:24,277 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/filter_iir.c[583,596] [2022-02-01 00:15:24,320 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-01 00:15:24,342 INFO L203 MainTranslator]: Completed pre-run [2022-02-01 00:15:24,355 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/filter_iir.c[583,596] [2022-02-01 00:15:24,397 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-01 00:15:24,418 INFO L208 MainTranslator]: Completed translation [2022-02-01 00:15:24,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:15:24 WrapperNode [2022-02-01 00:15:24,418 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-01 00:15:24,435 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-01 00:15:24,435 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-01 00:15:24,435 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-01 00:15:24,455 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:15:24" (1/1) ... [2022-02-01 00:15:24,455 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:15:24" (1/1) ... [2022-02-01 00:15:24,486 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:15:24" (1/1) ... [2022-02-01 00:15:24,486 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:15:24" (1/1) ... [2022-02-01 00:15:24,502 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:15:24" (1/1) ... [2022-02-01 00:15:24,505 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:15:24" (1/1) ... [2022-02-01 00:15:24,506 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:15:24" (1/1) ... [2022-02-01 00:15:24,530 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-01 00:15:24,531 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-01 00:15:24,532 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-01 00:15:24,532 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-01 00:15:24,534 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:15:24" (1/1) ... [2022-02-01 00:15:24,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-01 00:15:24,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-01 00:15:24,597 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 00:15:24,627 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 00:15:24,648 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-01 00:15:24,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-01 00:15:24,649 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-01 00:15:24,649 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-01 00:15:24,649 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-01 00:15:24,649 INFO L138 BoogieDeclarations]: Found implementation of procedure iir4 [2022-02-01 00:15:24,649 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-01 00:15:24,649 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-01 00:15:24,649 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-01 00:15:24,649 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-01 00:15:24,649 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-01 00:15:24,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_double [2022-02-01 00:15:24,649 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-01 00:15:24,650 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-01 00:15:24,650 INFO L130 BoogieDeclarations]: Found specification of procedure iir4 [2022-02-01 00:15:24,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2022-02-01 00:15:24,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2022-02-01 00:15:24,650 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-01 00:15:24,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-01 00:15:24,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-01 00:15:24,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2022-02-01 00:15:24,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-01 00:15:24,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-01 00:15:24,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-01 00:15:24,650 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-01 00:15:24,801 INFO L234 CfgBuilder]: Building ICFG [2022-02-01 00:15:24,803 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-01 00:15:25,233 INFO L275 CfgBuilder]: Performing block encoding [2022-02-01 00:15:25,237 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-01 00:15:25,237 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-01 00:15:25,239 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.02 12:15:25 BoogieIcfgContainer [2022-02-01 00:15:25,239 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-01 00:15:25,240 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-01 00:15:25,240 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-01 00:15:25,257 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-01 00:15:25,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.02 12:15:23" (1/3) ... [2022-02-01 00:15:25,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f8b9e8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.02 12:15:25, skipping insertion in model container [2022-02-01 00:15:25,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:15:24" (2/3) ... [2022-02-01 00:15:25,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f8b9e8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.02 12:15:25, skipping insertion in model container [2022-02-01 00:15:25,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.02 12:15:25" (3/3) ... [2022-02-01 00:15:25,259 INFO L111 eAbstractionObserver]: Analyzing ICFG filter_iir.c [2022-02-01 00:15:25,262 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-01 00:15:25,263 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-01 00:15:25,336 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-01 00:15:25,357 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 00:15:25,358 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-01 00:15:25,382 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) [2022-02-01 00:15:25,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-01 00:15:25,389 INFO L506 BasicCegarLoop]: Found error trace [2022-02-01 00:15:25,389 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] [2022-02-01 00:15:25,390 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-01 00:15:25,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-01 00:15:25,400 INFO L85 PathProgramCache]: Analyzing trace with hash 2034824645, now seen corresponding path program 1 times [2022-02-01 00:15:25,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-01 00:15:25,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052591850] [2022-02-01 00:15:25,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-01 00:15:25,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-01 00:15:25,517 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-01 00:15:25,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-01 00:15:25,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-01 00:15:25,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-01 00:15:25,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-02-01 00:15:25,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-01 00:15:25,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-02-01 00:15:25,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-01 00:15:26,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-01 00:15:26,008 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-01 00:15:26,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052591850] [2022-02-01 00:15:26,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2052591850] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-01 00:15:26,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-01 00:15:26,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-01 00:15:26,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551177251] [2022-02-01 00:15:26,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-01 00:15:26,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-01 00:15:26,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-01 00:15:26,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-01 00:15:26,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-01 00:15:26,062 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) [2022-02-01 00:15:26,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-01 00:15:26,325 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2022-02-01 00:15:26,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-01 00:15:26,328 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 [2022-02-01 00:15:26,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-01 00:15:26,332 INFO L225 Difference]: With dead ends: 55 [2022-02-01 00:15:26,332 INFO L226 Difference]: Without dead ends: 28 [2022-02-01 00:15:26,334 INFO L932 BasicCegarLoop]: 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 [2022-02-01 00:15:26,345 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 26 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-01 00:15:26,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 20 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-01 00:15:26,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-02-01 00:15:26,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-02-01 00:15:26,423 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) [2022-02-01 00:15:26,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-02-01 00:15:26,427 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 24 [2022-02-01 00:15:26,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-01 00:15:26,427 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-02-01 00:15:26,427 INFO L471 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) [2022-02-01 00:15:26,428 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-02-01 00:15:26,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-01 00:15:26,429 INFO L506 BasicCegarLoop]: Found error trace [2022-02-01 00:15:26,429 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] [2022-02-01 00:15:26,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-01 00:15:26,430 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-01 00:15:26,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-01 00:15:26,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1023707395, now seen corresponding path program 1 times [2022-02-01 00:15:26,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-01 00:15:26,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387640451] [2022-02-01 00:15:26,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-01 00:15:26,433 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-01 00:15:26,440 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-01 00:15:26,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-01 00:15:26,592 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-01 00:15:26,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-01 00:15:26,718 INFO L133 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2022-02-01 00:15:26,719 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-01 00:15:26,721 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-01 00:15:26,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-01 00:15:26,736 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2022-02-01 00:15:26,739 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-01 00:15:26,761 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.02 12:15:26 BoogieIcfgContainer [2022-02-01 00:15:26,761 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-01 00:15:26,763 INFO L158 Benchmark]: Toolchain (without parser) took 2812.95ms. Allocated memory was 167.8MB in the beginning and 201.3MB in the end (delta: 33.6MB). Free memory was 115.5MB in the beginning and 146.9MB in the end (delta: -31.4MB). Peak memory consumption was 3.5MB. Max. memory is 8.0GB. [2022-02-01 00:15:26,764 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 167.8MB. Free memory was 132.3MB in the beginning and 132.3MB in the end (delta: 68.0kB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-01 00:15:26,765 INFO L158 Benchmark]: CACSL2BoogieTranslator took 481.42ms. Allocated memory is still 167.8MB. Free memory was 115.4MB in the beginning and 140.3MB in the end (delta: -25.0MB). Peak memory consumption was 8.6MB. Max. memory is 8.0GB. [2022-02-01 00:15:26,768 INFO L158 Benchmark]: Boogie Preprocessor took 96.17ms. Allocated memory is still 167.8MB. Free memory was 140.3MB in the beginning and 138.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-01 00:15:26,770 INFO L158 Benchmark]: RCFGBuilder took 707.42ms. Allocated memory is still 167.8MB. Free memory was 138.1MB in the beginning and 122.1MB in the end (delta: 16.0MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. [2022-02-01 00:15:26,771 INFO L158 Benchmark]: TraceAbstraction took 1521.22ms. Allocated memory was 167.8MB in the beginning and 201.3MB in the end (delta: 33.6MB). Free memory was 121.6MB in the beginning and 146.9MB in the end (delta: -25.3MB). Peak memory consumption was 9.6MB. Max. memory is 8.0GB. [2022-02-01 00:15:26,790 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 167.8MB. Free memory was 132.3MB in the beginning and 132.3MB in the end (delta: 68.0kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 481.42ms. Allocated memory is still 167.8MB. Free memory was 115.4MB in the beginning and 140.3MB in the end (delta: -25.0MB). Peak memory consumption was 8.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 96.17ms. Allocated memory is still 167.8MB. Free memory was 140.3MB in the beginning and 138.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 707.42ms. Allocated memory is still 167.8MB. Free memory was 138.1MB in the beginning and 122.1MB in the end (delta: 16.0MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. * TraceAbstraction took 1521.22ms. Allocated memory was 167.8MB in the beginning and 201.3MB in the end (delta: 33.6MB). Free memory was 121.6MB in the beginning and 146.9MB in the end (delta: -25.3MB). Peak memory consumption was 9.6MB. 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; [L43] D1[0] = 0. [L43] D1[1] = 0. [L44] D2[0] = 0. [L44] D2[1] = 0. [L45] P = 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. [L50] CALL assume_abort_if_not(X >= -10. && X <= 10.) [L11] COND FALSE !(!cond) [L50] RET assume_abort_if_not(X >= -10. && X <= 10.) [L52] CALL iir4(&X, &P) [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 [L52] RET iir4(&X, &P) [L54] EXPR \read(P) [L54] EXPR P >= -1e30 && P <= 1e30 [L54] EXPR \read(P) [L54] EXPR P >= -1e30 && P <= 1e30 [L54] CALL __VERIFIER_assert(P >= -1e30 && P <= 1e30) [L13] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.4s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 29 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 26 mSDsluCounter, 20 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 12 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 28 IncrementalHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 12 mSolverCounterUnsat, 20 mSDtfsCounter, 28 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: 0.1s 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 00:15:26,835 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...