/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/floats-esbmc-regression/Double_div_bad.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-02-01 00:16:34,990 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-01 00:16:34,993 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-01 00:16:35,045 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-01 00:16:35,045 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-01 00:16:35,049 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-01 00:16:35,052 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-01 00:16:35,055 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-01 00:16:35,057 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-01 00:16:35,061 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-01 00:16:35,062 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-01 00:16:35,063 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-01 00:16:35,063 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-01 00:16:35,064 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-01 00:16:35,065 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-01 00:16:35,068 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-01 00:16:35,068 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-01 00:16:35,069 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-01 00:16:35,071 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-01 00:16:35,075 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-01 00:16:35,076 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-01 00:16:35,077 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-01 00:16:35,078 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-01 00:16:35,078 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-01 00:16:35,083 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-01 00:16:35,083 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-01 00:16:35,083 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-01 00:16:35,084 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-01 00:16:35,085 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-01 00:16:35,085 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-01 00:16:35,086 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-01 00:16:35,086 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-01 00:16:35,087 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-01 00:16:35,088 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-01 00:16:35,089 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-01 00:16:35,089 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-01 00:16:35,090 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-01 00:16:35,090 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-01 00:16:35,090 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-01 00:16:35,091 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-01 00:16:35,092 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-01 00:16:35,093 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 00:16:35,104 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-01 00:16:35,105 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-01 00:16:35,106 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-01 00:16:35,106 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-01 00:16:35,107 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-01 00:16:35,107 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-01 00:16:35,107 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-01 00:16:35,107 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-01 00:16:35,107 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-01 00:16:35,107 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-01 00:16:35,108 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-01 00:16:35,108 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-01 00:16:35,108 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-01 00:16:35,109 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-01 00:16:35,109 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-01 00:16:35,109 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-01 00:16:35,109 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-01 00:16:35,109 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-01 00:16:35,109 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-01 00:16:35,109 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-01 00:16:35,110 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-01 00:16:35,345 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-01 00:16:35,378 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-01 00:16:35,380 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-01 00:16:35,383 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-01 00:16:35,383 INFO L275 PluginConnector]: CDTParser initialized [2022-02-01 00:16:35,384 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/floats-esbmc-regression/Double_div_bad.i [2022-02-01 00:16:35,425 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22fa1ba18/76db85f10b114c8a8a6495764aa5d4b2/FLAG2b380c9e6 [2022-02-01 00:16:35,829 INFO L306 CDTParser]: Found 1 translation units. [2022-02-01 00:16:35,830 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/floats-esbmc-regression/Double_div_bad.i [2022-02-01 00:16:35,838 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22fa1ba18/76db85f10b114c8a8a6495764aa5d4b2/FLAG2b380c9e6 [2022-02-01 00:16:35,854 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22fa1ba18/76db85f10b114c8a8a6495764aa5d4b2 [2022-02-01 00:16:35,856 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-01 00:16:35,858 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-01 00:16:35,862 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-01 00:16:35,863 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-01 00:16:35,865 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-01 00:16:35,866 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.02 12:16:35" (1/1) ... [2022-02-01 00:16:35,867 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bcc5719 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:16:35, skipping insertion in model container [2022-02-01 00:16:35,867 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.02 12:16:35" (1/1) ... [2022-02-01 00:16:35,873 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-01 00:16:35,885 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-01 00:16:36,049 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/floats-esbmc-regression/Double_div_bad.i[808,821] [2022-02-01 00:16:36,057 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-01 00:16:36,063 INFO L203 MainTranslator]: Completed pre-run [2022-02-01 00:16:36,071 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/floats-esbmc-regression/Double_div_bad.i[808,821] [2022-02-01 00:16:36,073 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-01 00:16:36,084 INFO L208 MainTranslator]: Completed translation [2022-02-01 00:16:36,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:16:36 WrapperNode [2022-02-01 00:16:36,085 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-01 00:16:36,087 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-01 00:16:36,088 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-01 00:16:36,088 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-01 00:16:36,097 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:16:36" (1/1) ... [2022-02-01 00:16:36,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:16:36" (1/1) ... [2022-02-01 00:16:36,103 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:16:36" (1/1) ... [2022-02-01 00:16:36,103 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:16:36" (1/1) ... [2022-02-01 00:16:36,108 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:16:36" (1/1) ... [2022-02-01 00:16:36,111 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:16:36" (1/1) ... [2022-02-01 00:16:36,116 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:16:36" (1/1) ... [2022-02-01 00:16:36,117 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-01 00:16:36,118 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-01 00:16:36,118 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-01 00:16:36,119 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-01 00:16:36,120 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:16:36" (1/1) ... [2022-02-01 00:16:36,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-01 00:16:36,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-01 00:16:36,155 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 00:16:36,170 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 00:16:36,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-01 00:16:36,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-01 00:16:36,186 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-01 00:16:36,186 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-01 00:16:36,186 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-01 00:16:36,186 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-01 00:16:36,186 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-01 00:16:36,186 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-01 00:16:36,187 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-01 00:16:36,187 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-01 00:16:36,187 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-01 00:16:36,187 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-01 00:16:36,187 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-01 00:16:36,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-01 00:16:36,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-01 00:16:36,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-01 00:16:36,188 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-01 00:16:36,188 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-01 00:16:36,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-01 00:16:36,238 INFO L234 CfgBuilder]: Building ICFG [2022-02-01 00:16:36,239 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-01 00:16:36,345 INFO L275 CfgBuilder]: Performing block encoding [2022-02-01 00:16:36,349 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-01 00:16:36,349 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-01 00:16:36,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.02 12:16:36 BoogieIcfgContainer [2022-02-01 00:16:36,350 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-01 00:16:36,354 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-01 00:16:36,354 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-01 00:16:36,359 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-01 00:16:36,359 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.02 12:16:35" (1/3) ... [2022-02-01 00:16:36,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e4a483 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.02 12:16:36, skipping insertion in model container [2022-02-01 00:16:36,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.02 12:16:36" (2/3) ... [2022-02-01 00:16:36,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e4a483 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.02 12:16:36, skipping insertion in model container [2022-02-01 00:16:36,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.02 12:16:36" (3/3) ... [2022-02-01 00:16:36,361 INFO L111 eAbstractionObserver]: Analyzing ICFG Double_div_bad.i [2022-02-01 00:16:36,365 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-01 00:16:36,365 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-01 00:16:36,446 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-01 00:16:36,454 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 00:16:36,455 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-01 00:16:36,464 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-01 00:16:36,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-01 00:16:36,469 INFO L506 BasicCegarLoop]: Found error trace [2022-02-01 00:16:36,470 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-01 00:16:36,471 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-01 00:16:36,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-01 00:16:36,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1275796596, now seen corresponding path program 1 times [2022-02-01 00:16:36,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-01 00:16:36,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438218430] [2022-02-01 00:16:36,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-01 00:16:36,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-01 00:16:36,530 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-01 00:16:36,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-01 00:16:36,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-01 00:16:36,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-01 00:16:36,636 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 00:16:36,637 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-01 00:16:36,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438218430] [2022-02-01 00:16:36,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1438218430] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-01 00:16:36,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-01 00:16:36,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-01 00:16:36,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690791526] [2022-02-01 00:16:36,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-01 00:16:36,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-01 00:16:36,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-01 00:16:36,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-01 00:16:36,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-01 00:16:36,664 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-01 00:16:36,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-01 00:16:36,702 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2022-02-01 00:16:36,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-01 00:16:36,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-02-01 00:16:36,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-01 00:16:36,708 INFO L225 Difference]: With dead ends: 31 [2022-02-01 00:16:36,708 INFO L226 Difference]: Without dead ends: 12 [2022-02-01 00:16:36,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 00:16:36,714 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 10 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-01 00:16:36,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 21 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-01 00:16:36,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-02-01 00:16:36,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-02-01 00:16:36,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-01 00:16:36,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2022-02-01 00:16:36,736 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 11 [2022-02-01 00:16:36,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-01 00:16:36,737 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2022-02-01 00:16:36,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-01 00:16:36,738 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2022-02-01 00:16:36,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-01 00:16:36,738 INFO L506 BasicCegarLoop]: Found error trace [2022-02-01 00:16:36,738 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-01 00:16:36,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-01 00:16:36,739 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-01 00:16:36,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-01 00:16:36,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1279490680, now seen corresponding path program 1 times [2022-02-01 00:16:36,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-01 00:16:36,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1634164962] [2022-02-01 00:16:36,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-01 00:16:36,741 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-01 00:16:36,745 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-01 00:16:36,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-01 00:16:36,766 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-01 00:16:36,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-01 00:16:36,795 INFO L133 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2022-02-01 00:16:36,796 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-01 00:16:36,799 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-01 00:16:36,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-01 00:16:36,802 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2022-02-01 00:16:36,806 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-01 00:16:36,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.02 12:16:36 BoogieIcfgContainer [2022-02-01 00:16:36,816 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-01 00:16:36,817 INFO L158 Benchmark]: Toolchain (without parser) took 958.85ms. Allocated memory is still 179.3MB. Free memory was 131.1MB in the beginning and 120.5MB in the end (delta: 10.7MB). Peak memory consumption was 10.4MB. Max. memory is 8.0GB. [2022-02-01 00:16:36,818 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 179.3MB. Free memory is still 147.6MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-01 00:16:36,818 INFO L158 Benchmark]: CACSL2BoogieTranslator took 223.08ms. Allocated memory is still 179.3MB. Free memory was 131.0MB in the beginning and 156.5MB in the end (delta: -25.5MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2022-02-01 00:16:36,820 INFO L158 Benchmark]: Boogie Preprocessor took 29.86ms. Allocated memory is still 179.3MB. Free memory was 156.5MB in the beginning and 154.9MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-01 00:16:36,821 INFO L158 Benchmark]: RCFGBuilder took 232.34ms. Allocated memory is still 179.3MB. Free memory was 154.9MB in the beginning and 145.7MB in the end (delta: 9.2MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-02-01 00:16:36,823 INFO L158 Benchmark]: TraceAbstraction took 462.80ms. Allocated memory is still 179.3MB. Free memory was 145.2MB in the beginning and 120.5MB in the end (delta: 24.7MB). Peak memory consumption was 24.1MB. Max. memory is 8.0GB. [2022-02-01 00:16:36,827 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 179.3MB. Free memory is still 147.6MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 223.08ms. Allocated memory is still 179.3MB. Free memory was 131.0MB in the beginning and 156.5MB in the end (delta: -25.5MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 29.86ms. Allocated memory is still 179.3MB. Free memory was 156.5MB in the beginning and 154.9MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 232.34ms. Allocated memory is still 179.3MB. Free memory was 154.9MB in the beginning and 145.7MB in the end (delta: 9.2MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * TraceAbstraction took 462.80ms. Allocated memory is still 179.3MB. Free memory was 145.2MB in the beginning and 120.5MB in the end (delta: 24.7MB). Peak memory consumption was 24.1MB. 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 29, overapproximation of someBinaryArithmeticDOUBLEoperation at line 21. Possible FailurePath: [L20] double x = 1.0; [L21] double x1 = x/1.6; [L23] COND FALSE !(x1 != x) [L29] CALL __VERIFIER_assert(x == 0) [L13] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 11 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 10 mSDsluCounter, 21 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3 IncrementalHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 18 mSDtfsCounter, 3 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred 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 00:16:36,857 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...