/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.4 --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_1032b.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 13:20:47,733 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 13:20:47,737 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 13:20:47,782 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 13:20:47,783 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 13:20:47,793 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 13:20:47,795 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 13:20:47,799 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 13:20:47,802 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 13:20:47,806 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 13:20:47,807 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 13:20:47,808 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 13:20:47,809 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 13:20:47,812 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 13:20:47,816 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 13:20:47,818 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 13:20:47,819 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 13:20:47,820 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 13:20:47,822 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 13:20:47,829 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 13:20:47,831 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 13:20:47,832 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 13:20:47,833 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 13:20:47,835 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 13:20:47,839 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 13:20:47,839 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 13:20:47,839 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 13:20:47,842 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 13:20:47,842 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 13:20:47,843 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 13:20:47,844 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 13:20:47,844 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 13:20:47,846 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 13:20:47,847 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 13:20:47,848 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 13:20:47,848 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 13:20:47,849 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 13:20:47,849 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 13:20:47,849 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 13:20:47,851 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 13:20:47,852 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 13:20:47,853 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 13:20:47,901 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 13:20:47,901 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 13:20:47,903 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 13:20:47,903 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 13:20:47,903 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 13:20:47,903 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 13:20:47,904 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 13:20:47,904 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 13:20:47,904 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 13:20:47,905 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 13:20:47,906 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 13:20:47,906 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 13:20:47,906 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 13:20:47,907 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 13:20:47,907 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 13:20:47,907 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 13:20:47,907 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 13:20:47,907 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 13:20:47,907 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 13:20:47,908 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 13:20:47,909 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 13:20:47,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 13:20:47,909 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 13:20:47,909 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 13:20:47,909 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 13:20:47,910 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 13:20:47,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 13:20:47,910 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 13:20:47,910 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 13:20:47,910 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=SMALLESTAMONGWIDE;tolerance=0.4;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=SMALLESTAMONGWIDE;tolerance=0.4;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=SMALLESTAMONGWIDE;tolerance=0.4;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=SMALLESTAMONGWIDE;tolerance=0.4;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=SMALLESTAMONGWIDE;tolerance=0.4;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=SMALLESTAMONGWIDE;tolerance=0.4;log-additional-information=true; [2020-09-25 13:20:48,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 13:20:48,427 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 13:20:48,432 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 13:20:48,434 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 13:20:48,434 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 13:20:48,435 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1032b.c [2020-09-25 13:20:48,526 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fdfbd313e/b1c9b7dffa624e019dcdc74d659cc25f/FLAGdb1b34df7 [2020-09-25 13:20:49,063 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 13:20:49,064 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1032b.c [2020-09-25 13:20:49,072 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fdfbd313e/b1c9b7dffa624e019dcdc74d659cc25f/FLAGdb1b34df7 [2020-09-25 13:20:49,401 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fdfbd313e/b1c9b7dffa624e019dcdc74d659cc25f [2020-09-25 13:20:49,413 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 13:20:49,418 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 13:20:49,419 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 13:20:49,419 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 13:20:49,423 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 13:20:49,424 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:20:49" (1/1) ... [2020-09-25 13:20:49,428 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b9fc7e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:20:49, skipping insertion in model container [2020-09-25 13:20:49,428 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:20:49" (1/1) ... [2020-09-25 13:20:49,435 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 13:20:49,459 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 13:20:49,714 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 13:20:49,719 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 13:20:49,752 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 13:20:49,780 INFO L208 MainTranslator]: Completed translation [2020-09-25 13:20:49,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:20:49 WrapperNode [2020-09-25 13:20:49,781 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 13:20:49,782 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 13:20:49,782 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 13:20:49,782 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 13:20:49,899 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:20:49" (1/1) ... [2020-09-25 13:20:49,899 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:20:49" (1/1) ... [2020-09-25 13:20:49,912 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:20:49" (1/1) ... [2020-09-25 13:20:49,913 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:20:49" (1/1) ... [2020-09-25 13:20:49,926 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:20:49" (1/1) ... [2020-09-25 13:20:49,934 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:20:49" (1/1) ... [2020-09-25 13:20:49,936 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:20:49" (1/1) ... [2020-09-25 13:20:49,939 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 13:20:49,939 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 13:20:49,940 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 13:20:49,940 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 13:20:49,941 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:20:49" (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 13:20:50,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 13:20:50,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 13:20:50,034 INFO L138 BoogieDeclarations]: Found implementation of procedure round_float [2020-09-25 13:20:50,034 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-09-25 13:20:50,034 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 13:20:50,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 13:20:50,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-09-25 13:20:50,036 INFO L130 BoogieDeclarations]: Found specification of procedure round_float [2020-09-25 13:20:50,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 13:20:50,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-09-25 13:20:50,037 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-25 13:20:50,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 13:20:50,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-25 13:20:50,037 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-09-25 13:20:50,037 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-09-25 13:20:50,038 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 13:20:50,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 13:20:50,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 13:20:50,408 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 13:20:50,409 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-25 13:20:50,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:20:50 BoogieIcfgContainer [2020-09-25 13:20:50,415 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 13:20:50,417 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 13:20:50,417 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 13:20:50,421 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 13:20:50,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 01:20:49" (1/3) ... [2020-09-25 13:20:50,422 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35fbb04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:20:50, skipping insertion in model container [2020-09-25 13:20:50,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:20:49" (2/3) ... [2020-09-25 13:20:50,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35fbb04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:20:50, skipping insertion in model container [2020-09-25 13:20:50,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:20:50" (3/3) ... [2020-09-25 13:20:50,426 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1032b.c [2020-09-25 13:20:50,437 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 13:20:50,447 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 13:20:50,469 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 13:20:50,513 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 13:20:50,513 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 13:20:50,513 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 13:20:50,513 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 13:20:50,513 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 13:20:50,514 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 13:20:50,514 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 13:20:50,514 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 13:20:50,541 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states. [2020-09-25 13:20:50,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-25 13:20:50,549 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:20:50,550 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] [2020-09-25 13:20:50,550 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:20:50,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:20:50,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1398005522, now seen corresponding path program 1 times [2020-09-25 13:20:50,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:20:50,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1049000214] [2020-09-25 13:20:50,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:20:50,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:20:50,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:20:50,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:20:50,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-25 13:20:50,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:20:50,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-09-25 13:20:50,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:20:50,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:20:50,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:20:50,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-25 13:20:50,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:20:50,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 13:20:50,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 13:20:50,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:20:50,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:20:50,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:20:50,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 13:20:50,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:20:50,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 13:20:50,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:20:50,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:20:50,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:20:50,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 13:20:50,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:20:50,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:20:51,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-09-25 13:20:51,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 13:20:51,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 13:20:51,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 13:20:51,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-09-25 13:20:51,048 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 13:20:51,048 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-09-25 13:20:51,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-09-25 13:20:51,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 13:20:51,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 13:20:51,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-25 13:20:51,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 13:20:51,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 13:20:51,061 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 13:20:51,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1049000214] [2020-09-25 13:20:51,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 13:20:51,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 13:20:51,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051456291] [2020-09-25 13:20:51,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 13:20:51,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 13:20:51,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 13:20:51,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 13:20:51,095 INFO L87 Difference]: Start difference. First operand 84 states. Second operand 4 states. [2020-09-25 13:20:51,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 13:20:51,372 INFO L93 Difference]: Finished difference Result 155 states and 180 transitions. [2020-09-25 13:20:51,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 13:20:51,375 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-09-25 13:20:51,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 13:20:51,389 INFO L225 Difference]: With dead ends: 155 [2020-09-25 13:20:51,389 INFO L226 Difference]: Without dead ends: 76 [2020-09-25 13:20:51,394 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 [2020-09-25 13:20:51,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-25 13:20:51,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-09-25 13:20:51,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-25 13:20:51,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 81 transitions. [2020-09-25 13:20:51,453 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 81 transitions. Word has length 27 [2020-09-25 13:20:51,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 13:20:51,454 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 81 transitions. [2020-09-25 13:20:51,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 13:20:51,455 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 81 transitions. [2020-09-25 13:20:51,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-25 13:20:51,456 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 13:20:51,457 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] [2020-09-25 13:20:51,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 13:20:51,457 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 13:20:51,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 13:20:51,459 INFO L82 PathProgramCache]: Analyzing trace with hash -687584586, now seen corresponding path program 1 times [2020-09-25 13:20:51,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 13:20:51,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930985701] [2020-09-25 13:20:51,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 13:20:51,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 13:20:51,500 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 13:20:51,501 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 13:20:51,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 13:20:51,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 01:20:51 BoogieIcfgContainer [2020-09-25 13:20:51,529 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 13:20:51,533 INFO L168 Benchmark]: Toolchain (without parser) took 2116.47 ms. Allocated memory was 148.9 MB in the beginning and 206.0 MB in the end (delta: 57.1 MB). Free memory was 105.1 MB in the beginning and 100.1 MB in the end (delta: 5.0 MB). Peak memory consumption was 62.1 MB. Max. memory is 7.1 GB. [2020-09-25 13:20:51,534 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 148.9 MB. Free memory was 123.6 MB in the beginning and 123.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 13:20:51,535 INFO L168 Benchmark]: CACSL2BoogieTranslator took 362.40 ms. Allocated memory is still 148.9 MB. Free memory was 104.4 MB in the beginning and 93.2 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. [2020-09-25 13:20:51,536 INFO L168 Benchmark]: Boogie Preprocessor took 157.32 ms. Allocated memory was 148.9 MB in the beginning and 206.0 MB in the end (delta: 57.1 MB). Free memory was 93.0 MB in the beginning and 183.5 MB in the end (delta: -90.5 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-09-25 13:20:51,537 INFO L168 Benchmark]: RCFGBuilder took 476.10 ms. Allocated memory is still 206.0 MB. Free memory was 183.5 MB in the beginning and 160.1 MB in the end (delta: 23.4 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB. [2020-09-25 13:20:51,538 INFO L168 Benchmark]: TraceAbstraction took 1112.77 ms. Allocated memory is still 206.0 MB. Free memory was 159.5 MB in the beginning and 100.1 MB in the end (delta: 59.4 MB). Peak memory consumption was 59.4 MB. Max. memory is 7.1 GB. [2020-09-25 13:20:51,542 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 148.9 MB. Free memory was 123.6 MB in the beginning and 123.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 362.40 ms. Allocated memory is still 148.9 MB. Free memory was 104.4 MB in the beginning and 93.2 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 157.32 ms. Allocated memory was 148.9 MB in the beginning and 206.0 MB in the end (delta: 57.1 MB). Free memory was 93.0 MB in the beginning and 183.5 MB in the end (delta: -90.5 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 476.10 ms. Allocated memory is still 206.0 MB. Free memory was 183.5 MB in the beginning and 160.1 MB in the end (delta: 23.4 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1112.77 ms. Allocated memory is still 206.0 MB. Free memory was 159.5 MB in the beginning and 100.1 MB in the end (delta: 59.4 MB). Peak memory consumption was 59.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 80]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 79, overapproximation of bitwiseAnd at line 23, overapproximation of someUnaryFLOAToperation at line 75, overapproximation of someBinaryArithmeticFLOAToperation at line 43. Possible FailurePath: [L75] float x = -0.0f; [L76] CALL, EXPR round_float(x) [L13] __uint32_t w; [L15] int exponent_less_127; [L18] ieee_float_shape_type gf_u; [L19] gf_u.value = (x) [L20] EXPR gf_u.word [L20] (w) = gf_u.word [L23] exponent_less_127 = (int)((w & 0x7f800000) >> 23) - 127 [L25] COND FALSE !(exponent_less_127 < 23) [L41] COND TRUE exponent_less_127 == 128 [L43] return x + x; [L76] RET, EXPR round_float(x) [L76] float res = round_float(x); [L79] EXPR res == -0.0f && __signbit_float(res) == 1 [L79] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L80] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 84 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 85 SDtfs, 13 SDslu, 64 SDs, 0 SdLazy, 94 SolverSat, 6 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=84occurred 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, 0.3s InterpolantComputationTime, 63 NumberOfCodeBlocks, 63 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 26 ConstructedInterpolants, 0 QuantifiedInterpolants, 1222 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...