/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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 -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_0930.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 04:48:19,849 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 04:48:19,852 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 04:48:19,896 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 04:48:19,897 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 04:48:19,905 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 04:48:19,907 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 04:48:19,913 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 04:48:19,915 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 04:48:19,918 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 04:48:19,920 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 04:48:19,921 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 04:48:19,921 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 04:48:19,922 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 04:48:19,923 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 04:48:19,924 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 04:48:19,925 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 04:48:19,926 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 04:48:19,927 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 04:48:19,929 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 04:48:19,930 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 04:48:19,931 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 04:48:19,932 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 04:48:19,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 04:48:19,935 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 04:48:19,936 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 04:48:19,936 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 04:48:19,937 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 04:48:19,937 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 04:48:19,938 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 04:48:19,938 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 04:48:19,939 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 04:48:19,940 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 04:48:19,940 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 04:48:19,941 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 04:48:19,941 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 04:48:19,942 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 04:48:19,942 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 04:48:19,942 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 04:48:19,943 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 04:48:19,944 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 04:48:19,945 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 [2020-10-14 04:48:19,969 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 04:48:19,969 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 04:48:19,970 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 04:48:19,971 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 04:48:19,971 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 04:48:19,971 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 04:48:19,971 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 04:48:19,971 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 04:48:19,972 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 04:48:19,972 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 04:48:19,972 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 04:48:19,972 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 04:48:19,972 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 04:48:19,973 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 04:48:19,973 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 04:48:19,973 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 04:48:19,973 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 04:48:19,973 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 04:48:19,974 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 04:48:19,974 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 04:48:19,974 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 04:48:19,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 04:48:19,974 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 04:48:19,975 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 04:48:19,975 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 04:48:19,975 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 04:48:19,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 04:48:19,975 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 04:48:19,976 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 04:48:19,976 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 04:48:20,296 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 04:48:20,310 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 04:48:20,316 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 04:48:20,318 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 04:48:20,318 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 04:48:20,319 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_0930.c [2020-10-14 04:48:20,377 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6c68485e3/629783f5a56343d881892b2f63fbbbbc/FLAG16e242e29 [2020-10-14 04:48:20,865 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 04:48:20,866 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_0930.c [2020-10-14 04:48:20,874 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6c68485e3/629783f5a56343d881892b2f63fbbbbc/FLAG16e242e29 [2020-10-14 04:48:21,191 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6c68485e3/629783f5a56343d881892b2f63fbbbbc [2020-10-14 04:48:21,201 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 04:48:21,202 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 04:48:21,203 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 04:48:21,203 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 04:48:21,207 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 04:48:21,208 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 04:48:21" (1/1) ... [2020-10-14 04:48:21,212 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56d15d1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:48:21, skipping insertion in model container [2020-10-14 04:48:21,212 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 04:48:21" (1/1) ... [2020-10-14 04:48:21,221 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 04:48:21,260 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 04:48:21,470 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 04:48:21,474 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 04:48:21,613 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 04:48:21,636 INFO L208 MainTranslator]: Completed translation [2020-10-14 04:48:21,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:48:21 WrapperNode [2020-10-14 04:48:21,637 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 04:48:21,638 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 04:48:21,638 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 04:48:21,638 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 04:48:21,652 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:48:21" (1/1) ... [2020-10-14 04:48:21,653 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:48:21" (1/1) ... [2020-10-14 04:48:21,665 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:48:21" (1/1) ... [2020-10-14 04:48:21,665 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:48:21" (1/1) ... [2020-10-14 04:48:21,679 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:48:21" (1/1) ... [2020-10-14 04:48:21,686 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:48:21" (1/1) ... [2020-10-14 04:48:21,689 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:48:21" (1/1) ... [2020-10-14 04:48:21,692 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 04:48:21,693 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 04:48:21,693 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 04:48:21,693 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 04:48:21,694 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:48:21" (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 [2020-10-14 04:48:21,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 04:48:21,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 04:48:21,751 INFO L138 BoogieDeclarations]: Found implementation of procedure __ieee754_logf [2020-10-14 04:48:21,751 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-10-14 04:48:21,752 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 04:48:21,752 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 04:48:21,752 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-10-14 04:48:21,752 INFO L130 BoogieDeclarations]: Found specification of procedure __ieee754_logf [2020-10-14 04:48:21,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-14 04:48:21,752 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-14 04:48:21,753 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-14 04:48:21,753 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-14 04:48:21,753 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-14 04:48:21,753 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-10-14 04:48:21,753 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-10-14 04:48:21,753 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 04:48:21,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 04:48:21,754 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 04:48:22,159 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 04:48:22,160 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-14 04:48:22,164 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 04:48:22 BoogieIcfgContainer [2020-10-14 04:48:22,164 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 04:48:22,166 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 04:48:22,166 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 04:48:22,169 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 04:48:22,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 04:48:21" (1/3) ... [2020-10-14 04:48:22,170 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11e1612b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 04:48:22, skipping insertion in model container [2020-10-14 04:48:22,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 04:48:21" (2/3) ... [2020-10-14 04:48:22,171 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11e1612b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 04:48:22, skipping insertion in model container [2020-10-14 04:48:22,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 04:48:22" (3/3) ... [2020-10-14 04:48:22,173 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_0930.c [2020-10-14 04:48:22,184 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 04:48:22,191 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 04:48:22,220 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 04:48:22,243 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 04:48:22,243 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 04:48:22,244 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 04:48:22,244 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 04:48:22,244 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 04:48:22,244 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 04:48:22,245 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 04:48:22,245 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 04:48:22,263 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-10-14 04:48:22,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-14 04:48:22,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:48:22,271 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 04:48:22,271 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:48:22,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:48:22,276 INFO L82 PathProgramCache]: Analyzing trace with hash -11734775, now seen corresponding path program 1 times [2020-10-14 04:48:22,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:48:22,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463058679] [2020-10-14 04:48:22,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:48:22,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:48:22,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:48:22,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:48:22,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-14 04:48:22,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:48:22,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 157 [2020-10-14 04:48:22,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:48:22,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:48:22,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:48:22,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 04:48:22,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:48:22,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-14 04:48:22,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 04:48:22,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:48:22,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:48:22,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:48:22,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 04:48:22,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:48:22,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-14 04:48:22,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:48:22,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:48:22,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:48:22,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 04:48:22,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:48:22,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:48:22,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-14 04:48:22,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 04:48:22,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 04:48:22,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 04:48:22,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-14 04:48:22,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 04:48:22,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 04:48:22,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 04:48:22,818 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 04:48:22,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 04:48:22,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-14 04:48:22,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 04:48:22,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 04:48:22,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 04:48:22,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463058679] [2020-10-14 04:48:22,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 04:48:22,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 04:48:22,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229552399] [2020-10-14 04:48:22,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 04:48:22,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 04:48:22,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 04:48:22,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 04:48:22,854 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 4 states. [2020-10-14 04:48:23,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 04:48:23,156 INFO L93 Difference]: Finished difference Result 86 states and 127 transitions. [2020-10-14 04:48:23,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 04:48:23,158 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-14 04:48:23,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 04:48:23,169 INFO L225 Difference]: With dead ends: 86 [2020-10-14 04:48:23,169 INFO L226 Difference]: Without dead ends: 43 [2020-10-14 04:48:23,173 INFO L675 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 [2020-10-14 04:48:23,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-14 04:48:23,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-14 04:48:23,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-14 04:48:23,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2020-10-14 04:48:23,222 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 17 [2020-10-14 04:48:23,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 04:48:23,223 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2020-10-14 04:48:23,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 04:48:23,223 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2020-10-14 04:48:23,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 04:48:23,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 04:48:23,225 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 04:48:23,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 04:48:23,225 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 04:48:23,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 04:48:23,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1928303816, now seen corresponding path program 1 times [2020-10-14 04:48:23,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 04:48:23,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228221832] [2020-10-14 04:48:23,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 04:48:23,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-14 04:48:23,294 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-14 04:48:23,294 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-14 04:48:23,303 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 04:48:23,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 04:48:23 BoogieIcfgContainer [2020-10-14 04:48:23,327 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-14 04:48:23,331 INFO L168 Benchmark]: Toolchain (without parser) took 2126.78 ms. Allocated memory was 146.8 MB in the beginning and 232.3 MB in the end (delta: 85.5 MB). Free memory was 103.0 MB in the beginning and 186.9 MB in the end (delta: -83.9 MB). Peak memory consumption was 1.5 MB. Max. memory is 7.1 GB. [2020-10-14 04:48:23,333 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 146.8 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-14 04:48:23,336 INFO L168 Benchmark]: CACSL2BoogieTranslator took 434.32 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 102.8 MB in the beginning and 180.1 MB in the end (delta: -77.4 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. [2020-10-14 04:48:23,336 INFO L168 Benchmark]: Boogie Preprocessor took 54.93 ms. Allocated memory is still 203.9 MB. Free memory was 180.1 MB in the beginning and 177.8 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-10-14 04:48:23,337 INFO L168 Benchmark]: RCFGBuilder took 471.46 ms. Allocated memory is still 203.9 MB. Free memory was 177.8 MB in the beginning and 154.2 MB in the end (delta: 23.6 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. [2020-10-14 04:48:23,339 INFO L168 Benchmark]: TraceAbstraction took 1161.39 ms. Allocated memory was 203.9 MB in the beginning and 232.3 MB in the end (delta: 28.3 MB). Free memory was 154.2 MB in the beginning and 186.9 MB in the end (delta: -32.7 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-14 04:48:23,349 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 146.8 MB. Free memory was 121.4 MB in the beginning and 121.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 434.32 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 102.8 MB in the beginning and 180.1 MB in the end (delta: -77.4 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 54.93 ms. Allocated memory is still 203.9 MB. Free memory was 180.1 MB in the beginning and 177.8 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 471.46 ms. Allocated memory is still 203.9 MB. Free memory was 177.8 MB in the beginning and 154.2 MB in the end (delta: 23.6 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1161.39 ms. Allocated memory was 203.9 MB in the beginning and 232.3 MB in the end (delta: 28.3 MB). Free memory was 154.2 MB in the beginning and 186.9 MB in the end (delta: -32.7 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 121]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 120, overapproximation of someBinaryArithmeticFLOAToperation at line 32, overapproximation of bitwiseAnd at line 31. Possible FailurePath: [L12-L16] static const float ln2_hi_log = 6.9313812256e-01, ln2_lo_log = 9.0580006145e-06, two25_log = 3.355443200e+07, Lg1_log = 6.6666668653e-01, Lg2_log = 4.0000000596e-01, Lg3_log = 2.8571429849e-01, Lg4_log = 2.2222198546e-01, Lg5_log = 1.8183572590e-01, Lg6_log = 1.5313838422e-01, Lg7_log = 1.4798198640e-01; [L18] static const float zero_log = 0.0; [L116] float x = 1.0f; [L117] CALL, EXPR __ieee754_logf(x) [L21] float hfsq, f, s, z, R, w, t1, t2, dk; [L22] __int32_t k, ix, i, j; [L25] ieee_float_shape_type gf_u; [L26] gf_u.value = (x) [L27] EXPR gf_u.word [L27] (ix) = gf_u.word [L30] k = 0 [L31] COND TRUE ((ix & 0x7fffffff) == 0) [L32] return -two25_log / zero_log; [L117] RET, EXPR __ieee754_logf(x) [L117] float res = __ieee754_logf(x); [L120] EXPR res == 0.0f && __signbit_float(res) == 0 [L120] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L121] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 47 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: 50 SDtfs, 46 SDslu, 5 SDs, 0 SdLazy, 59 SolverSat, 12 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, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 35 NumberOfCodeBlocks, 35 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 1120 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...