/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 SingleStatement --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=0.2 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_0720.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 04:16:23,552 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 04:16:23,557 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 04:16:23,601 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 04:16:23,602 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 04:16:23,610 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 04:16:23,612 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 04:16:23,616 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 04:16:23,619 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 04:16:23,623 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 04:16:23,624 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 04:16:23,625 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 04:16:23,625 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 04:16:23,629 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 04:16:23,632 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 04:16:23,634 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 04:16:23,636 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 04:16:23,637 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 04:16:23,638 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 04:16:23,647 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 04:16:23,650 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 04:16:23,651 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 04:16:23,652 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 04:16:23,653 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 04:16:23,671 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 04:16:23,672 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 04:16:23,672 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 04:16:23,673 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 04:16:23,673 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 04:16:23,677 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 04:16:23,677 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 04:16:23,680 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 04:16:23,681 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 04:16:23,682 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 04:16:23,683 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 04:16:23,683 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 04:16:23,684 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 04:16:23,684 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 04:16:23,684 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 04:16:23,686 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 04:16:23,687 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 04:16:23,688 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 [2020-09-25 04:16:23,734 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 04:16:23,734 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 04:16:23,736 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 04:16:23,737 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 04:16:23,737 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 04:16:23,737 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 04:16:23,738 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 04:16:23,738 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 04:16:23,738 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 04:16:23,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 04:16:23,739 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 04:16:23,739 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 04:16:23,740 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 04:16:23,740 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 04:16:23,740 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 04:16:23,741 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 04:16:23,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 04:16:23,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 04:16:23,741 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 04:16:23,741 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 04:16:23,742 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 04:16:23,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 04:16:23,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 04:16:23,742 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 04:16:23,742 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 04:16:23,743 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 04:16:23,743 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 04:16:23,743 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 04:16:23,743 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 04:16:23,743 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 -> SingleStatement 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=0.2;log-additional-information=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=0.2;log-additional-information=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=0.2;log-additional-information=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=0.2;log-additional-information=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=0.2;log-additional-information=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=0.2;log-additional-information=true; [2020-09-25 04:16:24,188 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 04:16:24,208 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 04:16:24,214 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 04:16:24,215 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 04:16:24,216 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 04:16:24,217 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_0720.c [2020-09-25 04:16:24,342 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9e24a5ea8/0dd488c387f2422f882a406fdd533a7f/FLAGb34702405 [2020-09-25 04:16:24,939 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 04:16:24,940 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_0720.c [2020-09-25 04:16:24,950 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9e24a5ea8/0dd488c387f2422f882a406fdd533a7f/FLAGb34702405 [2020-09-25 04:16:25,313 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9e24a5ea8/0dd488c387f2422f882a406fdd533a7f [2020-09-25 04:16:25,327 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 04:16:25,334 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 04:16:25,335 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 04:16:25,335 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 04:16:25,339 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 04:16:25,340 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 04:16:25" (1/1) ... [2020-09-25 04:16:25,345 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@605628e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:16:25, skipping insertion in model container [2020-09-25 04:16:25,346 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 04:16:25" (1/1) ... [2020-09-25 04:16:25,355 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 04:16:25,391 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 04:16:25,653 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 04:16:25,659 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 04:16:25,801 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 04:16:25,830 INFO L208 MainTranslator]: Completed translation [2020-09-25 04:16:25,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:16:25 WrapperNode [2020-09-25 04:16:25,831 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 04:16:25,831 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 04:16:25,832 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 04:16:25,832 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 04:16:25,846 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:16:25" (1/1) ... [2020-09-25 04:16:25,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:16:25" (1/1) ... [2020-09-25 04:16:25,858 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:16:25" (1/1) ... [2020-09-25 04:16:25,859 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:16:25" (1/1) ... [2020-09-25 04:16:25,872 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:16:25" (1/1) ... [2020-09-25 04:16:25,880 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:16:25" (1/1) ... [2020-09-25 04:16:25,882 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:16:25" (1/1) ... [2020-09-25 04:16:25,886 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 04:16:25,887 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 04:16:25,887 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 04:16:25,887 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 04:16:25,888 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:16:25" (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 [2020-09-25 04:16:25,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 04:16:25,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 04:16:25,959 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2020-09-25 04:16:25,960 INFO L138 BoogieDeclarations]: Found implementation of procedure __ieee754_sqrtf [2020-09-25 04:16:25,960 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 04:16:25,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 04:16:25,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-09-25 04:16:25,960 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2020-09-25 04:16:25,961 INFO L130 BoogieDeclarations]: Found specification of procedure __ieee754_sqrtf [2020-09-25 04:16:25,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 04:16:25,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-09-25 04:16:25,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 04:16:25,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 04:16:25,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 04:16:25,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-09-25 04:16:25,962 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 04:16:25,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 04:16:25,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 04:16:26,408 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 04:16:26,409 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-25 04:16:26,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 04:16:26 BoogieIcfgContainer [2020-09-25 04:16:26,416 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 04:16:26,417 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 04:16:26,417 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 04:16:26,421 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 04:16:26,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 04:16:25" (1/3) ... [2020-09-25 04:16:26,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cbf71f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 04:16:26, skipping insertion in model container [2020-09-25 04:16:26,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 04:16:25" (2/3) ... [2020-09-25 04:16:26,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cbf71f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 04:16:26, skipping insertion in model container [2020-09-25 04:16:26,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 04:16:26" (3/3) ... [2020-09-25 04:16:26,425 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_0720.c [2020-09-25 04:16:26,436 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 04:16:26,446 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 04:16:26,469 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 04:16:26,500 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 04:16:26,501 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 04:16:26,501 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 04:16:26,501 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 04:16:26,501 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 04:16:26,501 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 04:16:26,501 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 04:16:26,502 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 04:16:26,527 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states. [2020-09-25 04:16:26,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-25 04:16:26,536 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:16:26,537 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] [2020-09-25 04:16:26,538 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:16:26,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:16:26,544 INFO L82 PathProgramCache]: Analyzing trace with hash -2082497467, now seen corresponding path program 1 times [2020-09-25 04:16:26,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:16:26,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658307992] [2020-09-25 04:16:26,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:16:26,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:16:26,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:16:26,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:16:26,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-25 04:16:26,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:16:26,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 176 [2020-09-25 04:16:26,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:16:26,876 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:16:26,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:16:26,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-09-25 04:16:26,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:16:26,877 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 04:16:26,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 04:16:26,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:16:26,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:16:26,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:16:26,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 04:16:26,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:16:26,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-09-25 04:16:26,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:16:26,996 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:16:26,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:16:26,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 04:16:26,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:16:26,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:16:27,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-25 04:16:27,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:16:27,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:16:27,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:16:27,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-25 04:16:27,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:16:27,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-09-25 04:16:27,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:16:27,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:16:27,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:16:27,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 04:16:27,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:16:27,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 04:16:27,101 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-25 04:16:27,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 04:16:27,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 04:16:27,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 04:16:27,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 04:16:27,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 04:16:27,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 04:16:27,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 04:16:27,111 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-09-25 04:16:27,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 04:16:27,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 04:16:27,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 04:16:27,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 04:16:27,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 04:16:27,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658307992] [2020-09-25 04:16:27,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 04:16:27,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 04:16:27,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396078714] [2020-09-25 04:16:27,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 04:16:27,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 04:16:27,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 04:16:27,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 04:16:27,156 INFO L87 Difference]: Start difference. First operand 105 states. Second operand 4 states. [2020-09-25 04:16:27,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 04:16:27,557 INFO L93 Difference]: Finished difference Result 188 states and 222 transitions. [2020-09-25 04:16:27,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 04:16:27,560 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2020-09-25 04:16:27,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 04:16:27,576 INFO L225 Difference]: With dead ends: 188 [2020-09-25 04:16:27,576 INFO L226 Difference]: Without dead ends: 98 [2020-09-25 04:16:27,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 04:16:27,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-25 04:16:27,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-09-25 04:16:27,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-25 04:16:27,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2020-09-25 04:16:27,638 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 38 [2020-09-25 04:16:27,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 04:16:27,639 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2020-09-25 04:16:27,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 04:16:27,639 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2020-09-25 04:16:27,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-25 04:16:27,641 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 04:16:27,641 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, 1, 1, 1] [2020-09-25 04:16:27,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 04:16:27,642 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 04:16:27,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 04:16:27,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1948696332, now seen corresponding path program 1 times [2020-09-25 04:16:27,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 04:16:27,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331647356] [2020-09-25 04:16:27,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 04:16:27,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 04:16:27,685 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 04:16:27,686 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 04:16:27,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 04:16:27,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 04:16:27 BoogieIcfgContainer [2020-09-25 04:16:27,715 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 04:16:27,719 INFO L168 Benchmark]: Toolchain (without parser) took 2388.68 ms. Allocated memory was 109.6 MB in the beginning and 185.1 MB in the end (delta: 75.5 MB). Free memory was 74.4 MB in the beginning and 126.8 MB in the end (delta: -52.3 MB). Peak memory consumption was 23.2 MB. Max. memory is 7.1 GB. [2020-09-25 04:16:27,721 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 109.6 MB. Free memory was 92.3 MB in the beginning and 92.2 MB in the end (delta: 105.1 kB). Peak memory consumption was 105.1 kB. Max. memory is 7.1 GB. [2020-09-25 04:16:27,722 INFO L168 Benchmark]: CACSL2BoogieTranslator took 496.33 ms. Allocated memory was 109.6 MB in the beginning and 162.5 MB in the end (delta: 53.0 MB). Free memory was 73.9 MB in the beginning and 147.7 MB in the end (delta: -73.9 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. [2020-09-25 04:16:27,723 INFO L168 Benchmark]: Boogie Preprocessor took 54.65 ms. Allocated memory is still 162.5 MB. Free memory was 147.7 MB in the beginning and 145.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-09-25 04:16:27,723 INFO L168 Benchmark]: RCFGBuilder took 529.18 ms. Allocated memory is still 162.5 MB. Free memory was 145.4 MB in the beginning and 120.0 MB in the end (delta: 25.4 MB). Peak memory consumption was 25.4 MB. Max. memory is 7.1 GB. [2020-09-25 04:16:27,725 INFO L168 Benchmark]: TraceAbstraction took 1298.73 ms. Allocated memory was 162.5 MB in the beginning and 185.1 MB in the end (delta: 22.5 MB). Free memory was 119.5 MB in the beginning and 126.8 MB in the end (delta: -7.3 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. [2020-09-25 04:16:27,729 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 109.6 MB. Free memory was 92.3 MB in the beginning and 92.2 MB in the end (delta: 105.1 kB). Peak memory consumption was 105.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 496.33 ms. Allocated memory was 109.6 MB in the beginning and 162.5 MB in the end (delta: 53.0 MB). Free memory was 73.9 MB in the beginning and 147.7 MB in the end (delta: -73.9 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 54.65 ms. Allocated memory is still 162.5 MB. Free memory was 147.7 MB in the beginning and 145.9 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 529.18 ms. Allocated memory is still 162.5 MB. Free memory was 145.4 MB in the beginning and 120.0 MB in the end (delta: 25.4 MB). Peak memory consumption was 25.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1298.73 ms. Allocated memory was 162.5 MB in the beginning and 185.1 MB in the end (delta: 22.5 MB). Free memory was 119.5 MB in the beginning and 126.8 MB in the end (delta: -7.3 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 96]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 13, overapproximation of someBinaryArithmeticFLOAToperation at line 30, overapproximation of bitwiseAnd at line 27. Possible FailurePath: [L15] static const float one_sqrt = 1.0, tiny_sqrt = 1.0e-30; [L91] float x = 0.0f / 0.0f; [L92] CALL, EXPR __ieee754_sqrtf(x) [L18] float z; [L19] __uint32_t r, hx; [L20] __int32_t ix, s, q, m, t, i; [L23] ieee_float_shape_type gf_u; [L24] gf_u.value = (x) [L25] EXPR gf_u.word [L25] (ix) = gf_u.word [L27] hx = ix & 0x7fffffff [L29] COND TRUE !((hx) < 0x7f800000L) [L30] return x * x + x; [L92] RET, EXPR __ieee754_sqrtf(x) [L92] float res = __ieee754_sqrtf(x); [L95] CALL, EXPR isnan_float(res) [L13] return x != x; [L95] RET, EXPR isnan_float(res) [L95] COND TRUE !isnan_float(res) [L96] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 105 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.1s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 112 SDtfs, 29 SDslu, 83 SDs, 0 SdLazy, 110 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=105occurred 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, 85 NumberOfCodeBlocks, 85 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 37 ConstructedInterpolants, 0 QuantifiedInterpolants, 2368 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...