/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-newlib/float_req_bl_0740.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-02-01 00:20:14,851 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-01 00:20:14,853 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-01 00:20:14,915 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-01 00:20:14,951 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-01 00:20:14,951 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-01 00:20:14,951 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-01 00:20:14,955 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 00:20:14,963 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-01 00:20:14,964 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-01 00:20:14,965 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-01 00:20:14,965 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-01 00:20:14,965 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-01 00:20:14,965 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-01 00:20:14,965 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-01 00:20:14,965 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-01 00:20:14,965 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-01 00:20:14,965 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-01 00:20:14,966 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-01 00:20:14,966 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-01 00:20:14,966 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-01 00:20:14,966 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-01 00:20:14,966 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-01 00:20:14,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-01 00:20:14,967 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-01 00:20:14,967 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-01 00:20:14,967 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-01 00:20:14,967 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-01 00:20:14,967 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-01 00:20:15,163 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-01 00:20:15,177 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-01 00:20:15,178 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-01 00:20:15,179 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-01 00:20:15,191 INFO L275 PluginConnector]: CDTParser initialized [2022-02-01 00:20:15,193 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_0740.c [2022-02-01 00:20:15,252 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1985ec820/f7bec4e41b474fdb8dbc896b63f8424c/FLAGde5e28749 [2022-02-01 00:20:15,592 INFO L306 CDTParser]: Found 1 translation units. [2022-02-01 00:20:15,593 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_0740.c [2022-02-01 00:20:15,600 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1985ec820/f7bec4e41b474fdb8dbc896b63f8424c/FLAGde5e28749 [2022-02-01 00:20:15,610 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1985ec820/f7bec4e41b474fdb8dbc896b63f8424c [2022-02-01 00:20:15,612 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-01 00:20:15,613 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-01 00:20:15,614 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-01 00:20:15,614 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-01 00:20:15,625 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-01 00:20:15,626 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.02 12:20:15" (1/1) ... [2022-02-01 00:20:15,626 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@687a29ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:20:15, skipping insertion in model container [2022-02-01 00:20:15,626 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.02 12:20:15" (1/1) ... [2022-02-01 00:20:15,631 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-01 00:20:15,645 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-01 00:20:15,771 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-newlib/float_req_bl_0740.c[1930,1943] [2022-02-01 00:20:15,773 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-01 00:20:15,778 INFO L203 MainTranslator]: Completed pre-run [2022-02-01 00:20:15,832 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-newlib/float_req_bl_0740.c[1930,1943] [2022-02-01 00:20:15,832 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-01 00:20:15,843 INFO L208 MainTranslator]: Completed translation [2022-02-01 00:20:15,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:20:15 WrapperNode [2022-02-01 00:20:15,843 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-01 00:20:15,844 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-01 00:20:15,844 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-01 00:20:15,844 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-01 00:20:15,851 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:20:15" (1/1) ... [2022-02-01 00:20:15,851 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:20:15" (1/1) ... [2022-02-01 00:20:15,859 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:20:15" (1/1) ... [2022-02-01 00:20:15,860 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:20:15" (1/1) ... [2022-02-01 00:20:15,865 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:20:15" (1/1) ... [2022-02-01 00:20:15,869 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:20:15" (1/1) ... [2022-02-01 00:20:15,870 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:20:15" (1/1) ... [2022-02-01 00:20:15,875 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-01 00:20:15,876 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-01 00:20:15,876 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-01 00:20:15,876 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-01 00:20:15,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:20:15" (1/1) ... [2022-02-01 00:20:15,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-01 00:20:15,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-01 00:20:15,905 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 00:20:15,911 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 00:20:15,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-01 00:20:15,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-01 00:20:15,931 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-01 00:20:15,931 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2022-02-01 00:20:15,931 INFO L138 BoogieDeclarations]: Found implementation of procedure __ieee754_sqrtf [2022-02-01 00:20:15,931 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-01 00:20:15,931 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-01 00:20:15,932 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-01 00:20:15,932 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-01 00:20:15,932 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-01 00:20:15,932 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2022-02-01 00:20:15,932 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2022-02-01 00:20:15,932 INFO L130 BoogieDeclarations]: Found specification of procedure __ieee754_sqrtf [2022-02-01 00:20:15,932 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-01 00:20:15,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2022-02-01 00:20:15,933 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-01 00:20:15,933 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-01 00:20:15,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-01 00:20:15,935 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2022-02-01 00:20:15,935 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-01 00:20:15,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-01 00:20:15,935 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-01 00:20:15,935 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-01 00:20:16,005 INFO L234 CfgBuilder]: Building ICFG [2022-02-01 00:20:16,006 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-01 00:20:16,139 INFO L275 CfgBuilder]: Performing block encoding [2022-02-01 00:20:16,143 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-01 00:20:16,143 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-02-01 00:20:16,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.02 12:20:16 BoogieIcfgContainer [2022-02-01 00:20:16,145 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-01 00:20:16,148 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-01 00:20:16,148 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-01 00:20:16,151 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-01 00:20:16,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.02 12:20:15" (1/3) ... [2022-02-01 00:20:16,151 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ba019cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.02 12:20:16, skipping insertion in model container [2022-02-01 00:20:16,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:20:15" (2/3) ... [2022-02-01 00:20:16,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ba019cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.02 12:20:16, skipping insertion in model container [2022-02-01 00:20:16,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.02 12:20:16" (3/3) ... [2022-02-01 00:20:16,153 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_0740.c [2022-02-01 00:20:16,157 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-01 00:20:16,157 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-01 00:20:16,191 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-01 00:20:16,196 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 00:20:16,196 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-01 00:20:16,210 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-01 00:20:16,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-01 00:20:16,216 INFO L506 BasicCegarLoop]: Found error trace [2022-02-01 00:20:16,216 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] [2022-02-01 00:20:16,216 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-01 00:20:16,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-01 00:20:16,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1455418548, now seen corresponding path program 1 times [2022-02-01 00:20:16,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-01 00:20:16,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538400658] [2022-02-01 00:20:16,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-01 00:20:16,236 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-01 00:20:16,276 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-01 00:20:16,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-01 00:20:16,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-01 00:20:16,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-01 00:20:16,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-01 00:20:16,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-01 00:20:16,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-02-01 00:20:16,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-01 00:20:16,485 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 00:20:16,486 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-01 00:20:16,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538400658] [2022-02-01 00:20:16,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [538400658] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-01 00:20:16,488 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-01 00:20:16,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-01 00:20:16,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469150251] [2022-02-01 00:20:16,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-01 00:20:16,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-01 00:20:16,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-01 00:20:16,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-01 00:20:16,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-01 00:20:16,522 INFO L87 Difference]: Start difference. First operand has 46 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 37 states have internal predecessors, (55), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-01 00:20:16,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-01 00:20:16,695 INFO L93 Difference]: Finished difference Result 84 states and 118 transitions. [2022-02-01 00:20:16,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-01 00:20:16,698 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 21 [2022-02-01 00:20:16,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-01 00:20:16,711 INFO L225 Difference]: With dead ends: 84 [2022-02-01 00:20:16,711 INFO L226 Difference]: Without dead ends: 42 [2022-02-01 00:20:16,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-01 00:20:16,718 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 49 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-01 00:20:16,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 54 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-01 00:20:16,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-02-01 00:20:16,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-02-01 00:20:16,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 34 states have internal predecessors, (45), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-01 00:20:16,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2022-02-01 00:20:16,754 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 21 [2022-02-01 00:20:16,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-01 00:20:16,754 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2022-02-01 00:20:16,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-02-01 00:20:16,755 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2022-02-01 00:20:16,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-01 00:20:16,755 INFO L506 BasicCegarLoop]: Found error trace [2022-02-01 00:20:16,755 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] [2022-02-01 00:20:16,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-01 00:20:16,756 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-01 00:20:16,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-01 00:20:16,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1136495776, now seen corresponding path program 1 times [2022-02-01 00:20:16,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-01 00:20:16,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2097549079] [2022-02-01 00:20:16,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-01 00:20:16,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-01 00:20:16,765 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-01 00:20:16,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-01 00:20:16,801 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-01 00:20:16,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-01 00:20:16,850 INFO L133 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2022-02-01 00:20:16,850 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-01 00:20:16,853 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-01 00:20:16,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-01 00:20:16,859 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2022-02-01 00:20:16,861 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-01 00:20:16,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.02 12:20:16 BoogieIcfgContainer [2022-02-01 00:20:16,872 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-01 00:20:16,873 INFO L158 Benchmark]: Toolchain (without parser) took 1259.75ms. Allocated memory was 183.5MB in the beginning and 238.0MB in the end (delta: 54.5MB). Free memory was 127.7MB in the beginning and 157.0MB in the end (delta: -29.3MB). Peak memory consumption was 26.6MB. Max. memory is 8.0GB. [2022-02-01 00:20:16,873 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 183.5MB. Free memory is still 144.4MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-01 00:20:16,874 INFO L158 Benchmark]: CACSL2BoogieTranslator took 229.32ms. Allocated memory was 183.5MB in the beginning and 238.0MB in the end (delta: 54.5MB). Free memory was 127.5MB in the beginning and 211.0MB in the end (delta: -83.5MB). Peak memory consumption was 14.4MB. Max. memory is 8.0GB. [2022-02-01 00:20:16,878 INFO L158 Benchmark]: Boogie Preprocessor took 31.24ms. Allocated memory is still 238.0MB. Free memory was 211.0MB in the beginning and 208.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-01 00:20:16,878 INFO L158 Benchmark]: RCFGBuilder took 269.11ms. Allocated memory is still 238.0MB. Free memory was 208.9MB in the beginning and 195.3MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2022-02-01 00:20:16,879 INFO L158 Benchmark]: TraceAbstraction took 724.28ms. Allocated memory is still 238.0MB. Free memory was 194.8MB in the beginning and 157.0MB in the end (delta: 37.8MB). Peak memory consumption was 37.7MB. Max. memory is 8.0GB. [2022-02-01 00:20:16,881 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 183.5MB. Free memory is still 144.4MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 229.32ms. Allocated memory was 183.5MB in the beginning and 238.0MB in the end (delta: 54.5MB). Free memory was 127.5MB in the beginning and 211.0MB in the end (delta: -83.5MB). Peak memory consumption was 14.4MB. Max. memory is 8.0GB. * Boogie Preprocessor took 31.24ms. Allocated memory is still 238.0MB. Free memory was 211.0MB in the beginning and 208.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 269.11ms. Allocated memory is still 238.0MB. Free memory was 208.9MB in the beginning and 195.3MB in the end (delta: 13.6MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 724.28ms. Allocated memory is still 238.0MB. Free memory was 194.8MB in the beginning and 157.0MB in the end (delta: 37.8MB). Peak memory consumption was 37.7MB. 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: 99]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 15, overapproximation of someBinaryArithmeticFLOAToperation at line 32, overapproximation of bitwiseAnd at line 29. Possible FailurePath: [L17] static const float one_sqrt = 1.0, tiny_sqrt = 1.0e-30; [L93] float x = -1.0f / 0.0f; [L95] CALL, EXPR __ieee754_sqrtf(x) [L20] float z; [L21] __uint32_t r, hx; [L22] __int32_t ix, s, q, m, t, i; [L25] ieee_float_shape_type gf_u; [L26] gf_u.value = (x) [L27] EXPR gf_u.word [L27] (ix) = gf_u.word [L29] hx = ix & 0x7fffffff [L31] COND TRUE !((hx) < 0x7f800000L) [L32] return x * x + x; [L95] RET, EXPR __ieee754_sqrtf(x) [L95] float res = __ieee754_sqrtf(x); [L98] CALL, EXPR isnan_float(res) [L15] return x != x; [L98] RET, EXPR isnan_float(res) [L98] COND TRUE !isnan_float(res) [L99] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 49 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 50 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 49 mSDsluCounter, 54 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2 mSDsCounter, 9 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 53 IncrementalHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9 mSolverCounterUnsat, 52 mSDtfsCounter, 53 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, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=0, InterpolantAutomatonStates: 5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 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 00:20:16,907 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...