/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.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1052c.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:08:51,873 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:08:51,877 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:08:51,938 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:08:51,938 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:08:51,945 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:08:51,947 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:08:51,952 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:08:51,956 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:08:51,962 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:08:51,964 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:08:51,965 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:08:51,966 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:08:51,969 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:08:51,971 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:08:51,973 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:08:51,975 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:08:51,978 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:08:51,986 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:08:51,994 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:08:51,996 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:08:51,998 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:08:52,002 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:08:52,004 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:08:52,014 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:08:52,014 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:08:52,015 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:08:52,016 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:08:52,016 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:08:52,018 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:08:52,018 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:08:52,019 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:08:52,020 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:08:52,021 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:08:52,022 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:08:52,022 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:08:52,023 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:08:52,023 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:08:52,023 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:08:52,024 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:08:52,025 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:08:52,026 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-29 09:08:52,052 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:08:52,052 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:08:52,054 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:08:52,054 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:08:52,055 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:08:52,055 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:08:52,055 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:08:52,056 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:08:52,056 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:08:52,056 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:08:52,056 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:08:52,056 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:08:52,057 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:08:52,057 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:08:52,057 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:08:52,057 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:08:52,058 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:08:52,058 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:08:52,058 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:08:52,058 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:08:52,059 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:08:52,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:08:52,059 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:08:52,059 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:08:52,060 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:08:52,060 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:08:52,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:08:52,060 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:08:52,060 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:08:52,061 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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-2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:08:52,456 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:08:52,484 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:08:52,487 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:08:52,488 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:08:52,489 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:08:52,490 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1052c.c [2020-10-29 09:08:52,584 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ffc573c6/091b9217955e4a6f9893727b55f7bdf1/FLAG8821fc569 [2020-10-29 09:08:53,259 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:08:53,260 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1052c.c [2020-10-29 09:08:53,269 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ffc573c6/091b9217955e4a6f9893727b55f7bdf1/FLAG8821fc569 [2020-10-29 09:08:53,588 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7ffc573c6/091b9217955e4a6f9893727b55f7bdf1 [2020-10-29 09:08:53,591 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:08:53,598 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:08:53,600 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:08:53,600 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:08:53,604 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:08:53,605 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:08:53" (1/1) ... [2020-10-29 09:08:53,608 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27a4f94b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:08:53, skipping insertion in model container [2020-10-29 09:08:53,609 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:08:53" (1/1) ... [2020-10-29 09:08:53,617 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:08:53,634 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:08:53,819 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:08:53,830 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:08:53,889 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:08:53,914 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:08:53,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:08:53 WrapperNode [2020-10-29 09:08:53,917 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:08:53,918 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:08:53,918 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:08:53,918 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:08:53,933 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:08:53" (1/1) ... [2020-10-29 09:08:53,935 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:08:53" (1/1) ... [2020-10-29 09:08:53,959 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:08:53" (1/1) ... [2020-10-29 09:08:53,959 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:08:53" (1/1) ... [2020-10-29 09:08:53,986 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:08:53" (1/1) ... [2020-10-29 09:08:53,998 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:08:53" (1/1) ... [2020-10-29 09:08:54,002 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:08:53" (1/1) ... [2020-10-29 09:08:54,012 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:08:54,016 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:08:54,016 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:08:54,017 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:08:54,020 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:08:53" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-29 09:08:54,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:08:54,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:08:54,124 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:08:54,124 INFO L138 BoogieDeclarations]: Found implementation of procedure floor_float [2020-10-29 09:08:54,125 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-10-29 09:08:54,126 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:08:54,126 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:08:54,127 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:08:54,127 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:08:54,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:08:54,128 INFO L130 BoogieDeclarations]: Found specification of procedure floor_float [2020-10-29 09:08:54,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-29 09:08:54,129 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:08:54,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:08:54,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:08:54,131 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-10-29 09:08:54,131 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-10-29 09:08:54,131 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:08:54,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:08:54,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:08:54,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:08:54,721 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:08:54,721 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-29 09:08:54,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:08:54 BoogieIcfgContainer [2020-10-29 09:08:54,723 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:08:54,725 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:08:54,725 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:08:54,729 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:08:54,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:08:53" (1/3) ... [2020-10-29 09:08:54,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b408d9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:08:54, skipping insertion in model container [2020-10-29 09:08:54,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:08:53" (2/3) ... [2020-10-29 09:08:54,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b408d9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:08:54, skipping insertion in model container [2020-10-29 09:08:54,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:08:54" (3/3) ... [2020-10-29 09:08:54,733 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_1052c.c [2020-10-29 09:08:54,745 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:08:54,751 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:08:54,765 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:08:54,807 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:08:54,808 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:08:54,808 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:08:54,808 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:08:54,808 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:08:54,809 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:08:54,809 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:08:54,809 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:08:54,834 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-10-29 09:08:54,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-29 09:08:54,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:08:54,844 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:08:54,845 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:08:54,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:08:54,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1106760941, now seen corresponding path program 1 times [2020-10-29 09:08:54,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:08:54,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531748297] [2020-10-29 09:08:54,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:08:55,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:08:55,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:08:55,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:08:55,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-29 09:08:55,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:08:55,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-10-29 09:08:55,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:08:55,207 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:08:55,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:08:55,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:08:55,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:08:55,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-29 09:08:55,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:08:55,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:08:55,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:08:55,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:08:55,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:08:55,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:08:55,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-29 09:08:55,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:08:55,347 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:08:55,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:08:55,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:08:55,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:08:55,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:08:55,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-29 09:08:55,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:08:55,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:08:55,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:08:55,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-29 09:08:55,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:08:55,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-29 09:08:55,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:08:55,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:08:55,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:08:55,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-29 09:08:55,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:08:55,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:08:55,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:08:55,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531748297] [2020-10-29 09:08:55,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:08:55,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:08:55,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309261902] [2020-10-29 09:08:55,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:08:55,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:08:55,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:08:55,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:08:55,476 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 4 states. [2020-10-29 09:08:55,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:08:55,730 INFO L93 Difference]: Finished difference Result 83 states and 117 transitions. [2020-10-29 09:08:55,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-29 09:08:55,732 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-29 09:08:55,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:08:55,743 INFO L225 Difference]: With dead ends: 83 [2020-10-29 09:08:55,743 INFO L226 Difference]: Without dead ends: 40 [2020-10-29 09:08:55,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:08:55,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-29 09:08:55,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-10-29 09:08:55,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-29 09:08:55,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2020-10-29 09:08:55,795 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 19 [2020-10-29 09:08:55,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:08:55,795 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2020-10-29 09:08:55,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:08:55,795 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2020-10-29 09:08:55,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-29 09:08:55,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:08:55,797 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] [2020-10-29 09:08:55,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:08:55,797 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:08:55,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:08:55,798 INFO L82 PathProgramCache]: Analyzing trace with hash 330221925, now seen corresponding path program 1 times [2020-10-29 09:08:55,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:08:55,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [841924008] [2020-10-29 09:08:55,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:08:55,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-29 09:08:55,862 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-29 09:08:55,862 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-29 09:08:55,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:08:55,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 09:08:55 BoogieIcfgContainer [2020-10-29 09:08:55,890 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-29 09:08:55,895 INFO L168 Benchmark]: Toolchain (without parser) took 2298.77 ms. Allocated memory is still 153.1 MB. Free memory was 127.7 MB in the beginning and 80.0 MB in the end (delta: 47.8 MB). Peak memory consumption was 48.7 MB. Max. memory is 8.0 GB. [2020-10-29 09:08:55,899 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 153.1 MB. Free memory is still 126.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-29 09:08:55,901 INFO L168 Benchmark]: CACSL2BoogieTranslator took 317.40 ms. Allocated memory is still 153.1 MB. Free memory was 127.1 MB in the beginning and 116.1 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-29 09:08:55,903 INFO L168 Benchmark]: Boogie Preprocessor took 97.20 ms. Allocated memory is still 153.1 MB. Free memory was 116.1 MB in the beginning and 114.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-29 09:08:55,904 INFO L168 Benchmark]: RCFGBuilder took 707.40 ms. Allocated memory is still 153.1 MB. Free memory was 114.3 MB in the beginning and 94.4 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2020-10-29 09:08:55,905 INFO L168 Benchmark]: TraceAbstraction took 1165.42 ms. Allocated memory is still 153.1 MB. Free memory was 94.1 MB in the beginning and 80.0 MB in the end (delta: 14.1 MB). Peak memory consumption was 15.2 MB. Max. memory is 8.0 GB. [2020-10-29 09:08:55,917 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 153.1 MB. Free memory is still 126.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 317.40 ms. Allocated memory is still 153.1 MB. Free memory was 127.1 MB in the beginning and 116.1 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 97.20 ms. Allocated memory is still 153.1 MB. Free memory was 116.1 MB in the beginning and 114.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 707.40 ms. Allocated memory is still 153.1 MB. Free memory was 114.3 MB in the beginning and 94.4 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1165.42 ms. Allocated memory is still 153.1 MB. Free memory was 94.1 MB in the beginning and 80.0 MB in the end (delta: 14.1 MB). Peak memory consumption was 15.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 81, overapproximation of bitwiseAnd at line 23, overapproximation of someUnaryFLOAToperation at line 77, overapproximation of someBinaryArithmeticFLOAToperation at line 46. Possible FailurePath: [L13] static const float huge_floor = 1.0e30; [L77] float x = -0.0f; [L78] CALL, EXPR floor_float(x) [L16] __int32_t i0, j0; [L17] __uint32_t i, ix; [L19] ieee_float_shape_type gf_u; [L20] gf_u.value = (x) [L21] EXPR gf_u.word [L21] (i0) = gf_u.word [L23] ix = (i0 & 0x7fffffff) [L24] j0 = (ix >> 23) - 0x7f [L25] COND FALSE !(j0 < 23) [L45] COND TRUE !((ix) < 0x7f800000L) [L46] return x + x; [L78] RET, EXPR floor_float(x) [L78] float res = floor_float(x); [L81] EXPR res == -0.0f && __signbit_float(res) == 1 [L81] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L82] CALL reach_error() [L3] __assert_fail("0", "float_req_bl_1052c.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 50 SDtfs, 8 SDslu, 43 SDs, 0 SdLazy, 48 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred 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, 0.0s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 39 NumberOfCodeBlocks, 39 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 18 ConstructedInterpolants, 0 QuantifiedInterpolants, 1134 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...