/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1071.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 22:35:54,672 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 22:35:54,675 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 22:35:54,728 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 22:35:54,762 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 22:35:54,764 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 22:35:54,767 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 22:35:54,769 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 22:35:54,771 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 22:35:54,772 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 22:35:54,779 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 22:35:54,786 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 22:35:54,787 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 22:35:54,789 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 22:35:54,791 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 22:35:54,793 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 22:35:54,800 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 22:35:54,813 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-23 22:35:54,838 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 22:35:54,838 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 22:35:54,843 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 22:35:54,844 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 22:35:54,844 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 22:35:54,844 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 22:35:54,844 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 22:35:54,844 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 22:35:54,845 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 22:35:54,845 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 22:35:54,846 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 22:35:54,846 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 22:35:54,846 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 22:35:54,847 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 22:35:54,847 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 22:35:54,847 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-23 22:35:54,847 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-23 22:35:54,848 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 22:35:54,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 22:35:54,848 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 22:35:54,848 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-23 22:35:54,848 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 22:35:54,849 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2021-02-23 22:35:55,261 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 22:35:55,285 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 22:35:55,288 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 22:35:55,289 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 22:35:55,290 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 22:35:55,291 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1071.c [2021-02-23 22:35:55,367 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36f0175de/7cd1344feae0432e975d99453a5cea88/FLAGa63ff1a26 [2021-02-23 22:35:56,000 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 22:35:56,001 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/float-newlib/float_req_bl_1071.c [2021-02-23 22:35:56,009 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36f0175de/7cd1344feae0432e975d99453a5cea88/FLAGa63ff1a26 [2021-02-23 22:35:56,374 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36f0175de/7cd1344feae0432e975d99453a5cea88 [2021-02-23 22:35:56,377 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 22:35:56,392 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 22:35:56,397 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 22:35:56,397 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 22:35:56,401 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 22:35:56,401 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:35:56" (1/1) ... [2021-02-23 22:35:56,403 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fcb02ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:35:56, skipping insertion in model container [2021-02-23 22:35:56,404 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 10:35:56" (1/1) ... [2021-02-23 22:35:56,412 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 22:35:56,432 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 22:35:56,672 WARN L226 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_1071.c[1429,1442] [2021-02-23 22:35:56,676 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 22:35:56,687 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 22:35:56,735 WARN L226 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_1071.c[1429,1442] [2021-02-23 22:35:56,737 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 22:35:56,756 INFO L208 MainTranslator]: Completed translation [2021-02-23 22:35:56,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:35:56 WrapperNode [2021-02-23 22:35:56,757 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 22:35:56,758 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 22:35:56,758 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 22:35:56,758 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 22:35:56,770 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:35:56" (1/1) ... [2021-02-23 22:35:56,771 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:35:56" (1/1) ... [2021-02-23 22:35:56,778 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:35:56" (1/1) ... [2021-02-23 22:35:56,778 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:35:56" (1/1) ... [2021-02-23 22:35:56,788 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:35:56" (1/1) ... [2021-02-23 22:35:56,793 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:35:56" (1/1) ... [2021-02-23 22:35:56,794 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:35:56" (1/1) ... [2021-02-23 22:35:56,797 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 22:35:56,798 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 22:35:56,798 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 22:35:56,798 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 22:35:56,799 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:35:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 22:35:56,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 22:35:56,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 22:35:56,891 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 22:35:56,891 INFO L138 BoogieDeclarations]: Found implementation of procedure trunc_float [2021-02-23 22:35:56,892 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2021-02-23 22:35:56,892 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 22:35:56,892 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 22:35:56,892 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 22:35:56,893 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 22:35:56,893 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 22:35:56,893 INFO L130 BoogieDeclarations]: Found specification of procedure trunc_float [2021-02-23 22:35:56,894 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2021-02-23 22:35:56,894 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 22:35:56,894 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 22:35:56,895 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 22:35:56,896 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2021-02-23 22:35:56,896 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2021-02-23 22:35:56,897 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 22:35:56,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 22:35:56,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 22:35:56,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 22:35:57,321 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 22:35:57,322 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-02-23 22:35:57,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:35:57 BoogieIcfgContainer [2021-02-23 22:35:57,323 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 22:35:57,325 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 22:35:57,326 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 22:35:57,329 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 22:35:57,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 10:35:56" (1/3) ... [2021-02-23 22:35:57,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67cdebcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:35:57, skipping insertion in model container [2021-02-23 22:35:57,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 10:35:56" (2/3) ... [2021-02-23 22:35:57,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67cdebcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 10:35:57, skipping insertion in model container [2021-02-23 22:35:57,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 10:35:57" (3/3) ... [2021-02-23 22:35:57,332 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1071.c [2021-02-23 22:35:57,339 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-23 22:35:57,343 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 22:35:57,362 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 22:35:57,385 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 22:35:57,385 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 22:35:57,386 INFO L378 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2021-02-23 22:35:57,386 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 22:35:57,386 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 22:35:57,386 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 22:35:57,386 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 22:35:57,386 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 22:35:57,401 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states. [2021-02-23 22:35:57,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-23 22:35:57,408 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:35:57,409 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:35:57,410 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:35:57,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:35:57,416 INFO L82 PathProgramCache]: Analyzing trace with hash 130139497, now seen corresponding path program 1 times [2021-02-23 22:35:57,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:35:57,425 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754978828] [2021-02-23 22:35:57,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:35:57,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:35:57,613 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:35:57,614 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:35:57,615 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:35:57,616 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:35:57,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 22:35:57,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:35:57,703 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:35:57,706 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:35:57,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-02-23 22:35:57,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:35:57,745 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:35:57,746 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:35:57,748 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:35:57,749 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:35:57,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-02-23 22:35:57,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 22:35:57,768 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 22:35:57,769 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 22:35:57,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 22:35:57,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754978828] [2021-02-23 22:35:57,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 22:35:57,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 22:35:57,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765853485] [2021-02-23 22:35:57,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 22:35:57,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-23 22:35:57,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 22:35:57,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 22:35:57,816 INFO L87 Difference]: Start difference. First operand 70 states. Second operand 4 states. [2021-02-23 22:35:58,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 22:35:58,116 INFO L93 Difference]: Finished difference Result 121 states and 139 transitions. [2021-02-23 22:35:58,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 22:35:58,118 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2021-02-23 22:35:58,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 22:35:58,129 INFO L225 Difference]: With dead ends: 121 [2021-02-23 22:35:58,130 INFO L226 Difference]: Without dead ends: 63 [2021-02-23 22:35:58,135 INFO L677 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 [2021-02-23 22:35:58,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-02-23 22:35:58,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-02-23 22:35:58,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-02-23 22:35:58,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2021-02-23 22:35:58,232 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 37 [2021-02-23 22:35:58,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 22:35:58,233 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2021-02-23 22:35:58,233 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 22:35:58,233 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2021-02-23 22:35:58,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-02-23 22:35:58,237 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 22:35:58,238 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 22:35:58,238 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 22:35:58,239 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 22:35:58,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 22:35:58,240 INFO L82 PathProgramCache]: Analyzing trace with hash -771673238, now seen corresponding path program 1 times [2021-02-23 22:35:58,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-23 22:35:58,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12432410] [2021-02-23 22:35:58,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 22:35:58,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 22:35:58,366 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 22:35:58,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 22:35:58,436 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 22:35:58,468 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-23 22:35:58,468 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 22:35:58,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 22:35:58,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 10:35:58 BoogieIcfgContainer [2021-02-23 22:35:58,520 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 22:35:58,522 INFO L168 Benchmark]: Toolchain (without parser) took 2141.92 ms. Allocated memory was 164.6 MB in the beginning and 198.2 MB in the end (delta: 33.6 MB). Free memory was 140.1 MB in the beginning and 167.7 MB in the end (delta: -27.6 MB). Peak memory consumption was 7.5 MB. Max. memory is 8.0 GB. [2021-02-23 22:35:58,523 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 164.6 MB. Free memory is still 137.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 22:35:58,524 INFO L168 Benchmark]: CACSL2BoogieTranslator took 360.87 ms. Allocated memory is still 164.6 MB. Free memory was 138.9 MB in the beginning and 128.9 MB in the end (delta: 10.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-23 22:35:58,525 INFO L168 Benchmark]: Boogie Preprocessor took 38.99 ms. Allocated memory is still 164.6 MB. Free memory was 128.9 MB in the beginning and 127.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-23 22:35:58,527 INFO L168 Benchmark]: RCFGBuilder took 525.62 ms. Allocated memory is still 164.6 MB. Free memory was 127.1 MB in the beginning and 140.9 MB in the end (delta: -13.8 MB). Peak memory consumption was 17.1 MB. Max. memory is 8.0 GB. [2021-02-23 22:35:58,528 INFO L168 Benchmark]: TraceAbstraction took 1194.98 ms. Allocated memory was 164.6 MB in the beginning and 198.2 MB in the end (delta: 33.6 MB). Free memory was 140.4 MB in the beginning and 167.7 MB in the end (delta: -27.3 MB). Peak memory consumption was 8.3 MB. Max. memory is 8.0 GB. [2021-02-23 22:35:58,533 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 164.6 MB. Free memory is still 137.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 360.87 ms. Allocated memory is still 164.6 MB. Free memory was 138.9 MB in the beginning and 128.9 MB in the end (delta: 10.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.99 ms. Allocated memory is still 164.6 MB. Free memory was 128.9 MB in the beginning and 127.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 525.62 ms. Allocated memory is still 164.6 MB. Free memory was 127.1 MB in the beginning and 140.9 MB in the end (delta: -13.8 MB). Peak memory consumption was 17.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1194.98 ms. Allocated memory was 164.6 MB in the beginning and 198.2 MB in the end (delta: 33.6 MB). Free memory was 140.4 MB in the beginning and 167.7 MB in the end (delta: -27.3 MB). Peak memory consumption was 8.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 59]: 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 46, overapproximation of someBinaryArithmeticFLOAToperation at line 40, overapproximation of bitwiseAnd at line 22. Possible FailurePath: [L54] float x = 0.0f / 0.0f; [L55] CALL, EXPR trunc_float(x) VAL [\old(x)=4294967298] [L15] __int32_t signbit, w, exponent_less_127; VAL [\old(x)=4294967298, x=4294967298] [L17] ieee_float_shape_type gf_u; VAL [\old(x)=4294967298, gf_u={3:0}, x=4294967298] [L18] gf_u.value = (x) VAL [\old(x)=4294967298, gf_u={3:0}, x=4294967298] [L19] EXPR gf_u.word VAL [\old(x)=4294967298, gf_u={3:0}, gf_u.word=4294967294, x=4294967298] [L19] (w) = gf_u.word VAL [\old(x)=4294967298, gf_u={3:0}, gf_u.word=4294967294, w=-2, x=4294967298] [L21] signbit = w & 0x80000000 VAL [\old(x)=4294967298, signbit=8, w=-2, x=4294967298] [L22] exponent_less_127 = ((w & 0x7f800000) >> 23) - 127 VAL [\old(x)=4294967298, exponent_less_127=255, signbit=8, w=-2, x=4294967298] [L23] COND FALSE !(exponent_less_127 < 23) VAL [\old(x)=4294967298, exponent_less_127=255, signbit=8, w=-2, x=4294967298] [L39] COND TRUE exponent_less_127 == 255 VAL [\old(x)=4294967298, exponent_less_127=255, signbit=8, w=-2, x=4294967298] [L40] return x + x; VAL [\old(x)=4294967298, exponent_less_127=255, signbit=8, w=-2, x=4294967298] [L55] RET, EXPR trunc_float(x) VAL [trunc_float(x)=4294967300, x=4294967298] [L55] float res = trunc_float(x); VAL [res=4294967300, trunc_float(x)=4294967300, x=4294967298] [L58] CALL, EXPR isnan_float(res) VAL [\old(x)=4294967300] [L46] return x != x; VAL [\old(x)=4294967300, \result=0, x=4294967300] [L58] RET, EXPR isnan_float(res) VAL [isnan_float(res)=0, res=4294967300, x=4294967298] [L58] COND TRUE !isnan_float(res) VAL [isnan_float(res)=0, res=4294967300, x=4294967298] [L59] reach_error() VAL [res=4294967300, x=4294967298] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 73 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 69 SDtfs, 17 SDslu, 41 SDs, 0 SdLazy, 78 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, 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=70occurred in iteration=0, 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: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 81 NumberOfCodeBlocks, 81 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 2808 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, 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 Received shutdown request...