/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=NARROWEST --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_0970b.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 10:20:04,154 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 10:20:04,156 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 10:20:04,180 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 10:20:04,181 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 10:20:04,182 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 10:20:04,183 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 10:20:04,185 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 10:20:04,186 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 10:20:04,187 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 10:20:04,188 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 10:20:04,189 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 10:20:04,189 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 10:20:04,190 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 10:20:04,191 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 10:20:04,192 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 10:20:04,193 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 10:20:04,194 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 10:20:04,195 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 10:20:04,197 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 10:20:04,198 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 10:20:04,199 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 10:20:04,200 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 10:20:04,201 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 10:20:04,204 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 10:20:04,204 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 10:20:04,204 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 10:20:04,205 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 10:20:04,205 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 10:20:04,206 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 10:20:04,206 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 10:20:04,207 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 10:20:04,208 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 10:20:04,208 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 10:20:04,209 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 10:20:04,209 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 10:20:04,213 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 10:20:04,214 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 10:20:04,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 10:20:04,215 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 10:20:04,216 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 10:20:04,216 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 [2020-10-13 10:20:04,262 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 10:20:04,263 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 10:20:04,264 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 10:20:04,267 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 10:20:04,267 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 10:20:04,268 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 10:20:04,268 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 10:20:04,268 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 10:20:04,268 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 10:20:04,268 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 10:20:04,268 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 10:20:04,269 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 10:20:04,269 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 10:20:04,269 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 10:20:04,269 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 10:20:04,269 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 10:20:04,269 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 10:20:04,270 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 10:20:04,270 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 10:20:04,270 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 10:20:04,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 10:20:04,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 10:20:04,271 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 10:20:04,271 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 10:20:04,271 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 10:20:04,271 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 10:20:04,271 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 10:20:04,271 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 10:20:04,272 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 10:20:04,272 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 10:20:04,561 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 10:20:04,574 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 10:20:04,577 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 10:20:04,579 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 10:20:04,580 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 10:20:04,581 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_0970b.c [2020-10-13 10:20:04,630 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c5b529ec2/e600363514664326ba8a19fd4220d44c/FLAGeed5a279d [2020-10-13 10:20:05,062 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 10:20:05,063 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_0970b.c [2020-10-13 10:20:05,069 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c5b529ec2/e600363514664326ba8a19fd4220d44c/FLAGeed5a279d [2020-10-13 10:20:05,409 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c5b529ec2/e600363514664326ba8a19fd4220d44c [2020-10-13 10:20:05,421 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 10:20:05,422 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 10:20:05,426 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 10:20:05,426 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 10:20:05,430 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 10:20:05,430 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:20:05" (1/1) ... [2020-10-13 10:20:05,434 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d5d5e76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:20:05, skipping insertion in model container [2020-10-13 10:20:05,434 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 10:20:05" (1/1) ... [2020-10-13 10:20:05,443 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 10:20:05,478 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 10:20:05,734 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:20:05,739 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 10:20:05,883 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 10:20:05,910 INFO L208 MainTranslator]: Completed translation [2020-10-13 10:20:05,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:20:05 WrapperNode [2020-10-13 10:20:05,910 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 10:20:05,911 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 10:20:05,911 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 10:20:05,911 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 10:20:05,921 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:20:05" (1/1) ... [2020-10-13 10:20:05,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:20:05" (1/1) ... [2020-10-13 10:20:05,932 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:20:05" (1/1) ... [2020-10-13 10:20:05,932 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:20:05" (1/1) ... [2020-10-13 10:20:05,948 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:20:05" (1/1) ... [2020-10-13 10:20:05,955 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:20:05" (1/1) ... [2020-10-13 10:20:05,958 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:20:05" (1/1) ... [2020-10-13 10:20:05,962 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 10:20:05,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 10:20:05,962 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 10:20:05,962 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 10:20:05,963 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:20:05" (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 [2020-10-13 10:20:06,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 10:20:06,019 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 10:20:06,019 INFO L138 BoogieDeclarations]: Found implementation of procedure __ieee754_logf [2020-10-13 10:20:06,019 INFO L138 BoogieDeclarations]: Found implementation of procedure __ieee754_log10f [2020-10-13 10:20:06,019 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2020-10-13 10:20:06,020 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 10:20:06,020 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 10:20:06,020 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-10-13 10:20:06,020 INFO L130 BoogieDeclarations]: Found specification of procedure __ieee754_logf [2020-10-13 10:20:06,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 10:20:06,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-13 10:20:06,021 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 10:20:06,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 10:20:06,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 10:20:06,021 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-10-13 10:20:06,021 INFO L130 BoogieDeclarations]: Found specification of procedure __ieee754_log10f [2020-10-13 10:20:06,021 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2020-10-13 10:20:06,021 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 10:20:06,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 10:20:06,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 10:20:06,483 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 10:20:06,483 INFO L295 CfgBuilder]: Removed 12 assume(true) statements. [2020-10-13 10:20:06,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:20:06 BoogieIcfgContainer [2020-10-13 10:20:06,487 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 10:20:06,489 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 10:20:06,489 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 10:20:06,492 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 10:20:06,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 10:20:05" (1/3) ... [2020-10-13 10:20:06,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11bf4dec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:20:06, skipping insertion in model container [2020-10-13 10:20:06,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 10:20:05" (2/3) ... [2020-10-13 10:20:06,493 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11bf4dec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 10:20:06, skipping insertion in model container [2020-10-13 10:20:06,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 10:20:06" (3/3) ... [2020-10-13 10:20:06,495 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_0970b.c [2020-10-13 10:20:06,505 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 10:20:06,512 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 10:20:06,526 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 10:20:06,550 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 10:20:06,550 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 10:20:06,550 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 10:20:06,550 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 10:20:06,551 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 10:20:06,551 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 10:20:06,551 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 10:20:06,551 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 10:20:06,568 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states. [2020-10-13 10:20:06,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 10:20:06,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:20:06,576 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] [2020-10-13 10:20:06,576 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:20:06,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:20:06,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1481260297, now seen corresponding path program 1 times [2020-10-13 10:20:06,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:20:06,592 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432246487] [2020-10-13 10:20:06,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:20:06,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:20:06,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:20:06,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:20:06,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 10:20:06,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:20:06,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 174 [2020-10-13 10:20:06,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:20:06,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:20:06,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 10:20:06,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:20:06,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 10:20:07,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 10:20:07,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:20:07,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:20:07,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:20:07,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:20:07,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:20:07,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 10:20:07,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:20:07,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:20:07,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 10:20:07,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:20:07,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:20:07,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-13 10:20:07,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:20:07,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:20:07,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:20:07,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-13 10:20:07,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:20:07,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 10:20:07,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:20:07,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:20:07,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-13 10:20:07,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:20:07,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:20:07,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-13 10:20:07,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 10:20:07,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 10:20:07,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 10:20:07,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 10:20:07,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 10:20:07,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 10:20:07,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 10:20:07,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 10:20:07,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 10:20:07,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 10:20:07,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 10:20:07,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 10:20:07,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1432246487] [2020-10-13 10:20:07,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 10:20:07,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 10:20:07,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662273976] [2020-10-13 10:20:07,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 10:20:07,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 10:20:07,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 10:20:07,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 10:20:07,214 INFO L87 Difference]: Start difference. First operand 60 states. Second operand 4 states. [2020-10-13 10:20:07,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 10:20:07,575 INFO L93 Difference]: Finished difference Result 112 states and 167 transitions. [2020-10-13 10:20:07,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 10:20:07,577 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-13 10:20:07,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 10:20:07,587 INFO L225 Difference]: With dead ends: 112 [2020-10-13 10:20:07,587 INFO L226 Difference]: Without dead ends: 56 [2020-10-13 10:20:07,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 10:20:07,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-13 10:20:07,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-13 10:20:07,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 10:20:07,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2020-10-13 10:20:07,638 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 21 [2020-10-13 10:20:07,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 10:20:07,638 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2020-10-13 10:20:07,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 10:20:07,639 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2020-10-13 10:20:07,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 10:20:07,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 10:20:07,640 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] [2020-10-13 10:20:07,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 10:20:07,641 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 10:20:07,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 10:20:07,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1658056035, now seen corresponding path program 1 times [2020-10-13 10:20:07,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 10:20:07,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232834257] [2020-10-13 10:20:07,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 10:20:07,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-13 10:20:07,682 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-13 10:20:07,682 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-13 10:20:07,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 10:20:07,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 10:20:07 BoogieIcfgContainer [2020-10-13 10:20:07,725 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-13 10:20:07,728 INFO L168 Benchmark]: Toolchain (without parser) took 2304.81 ms. Allocated memory was 146.8 MB in the beginning and 234.4 MB in the end (delta: 87.6 MB). Free memory was 104.1 MB in the beginning and 162.7 MB in the end (delta: -58.6 MB). Peak memory consumption was 28.9 MB. Max. memory is 7.1 GB. [2020-10-13 10:20:07,728 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 146.8 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-13 10:20:07,730 INFO L168 Benchmark]: CACSL2BoogieTranslator took 484.77 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 103.8 MB in the beginning and 180.9 MB in the end (delta: -77.1 MB). Peak memory consumption was 21.7 MB. Max. memory is 7.1 GB. [2020-10-13 10:20:07,730 INFO L168 Benchmark]: Boogie Preprocessor took 50.81 ms. Allocated memory is still 203.9 MB. Free memory was 180.9 MB in the beginning and 178.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-10-13 10:20:07,731 INFO L168 Benchmark]: RCFGBuilder took 525.37 ms. Allocated memory is still 203.9 MB. Free memory was 178.2 MB in the beginning and 150.1 MB in the end (delta: 28.2 MB). Peak memory consumption was 28.2 MB. Max. memory is 7.1 GB. [2020-10-13 10:20:07,732 INFO L168 Benchmark]: TraceAbstraction took 1236.71 ms. Allocated memory was 203.9 MB in the beginning and 234.4 MB in the end (delta: 30.4 MB). Free memory was 149.4 MB in the beginning and 162.7 MB in the end (delta: -13.3 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. [2020-10-13 10:20:07,736 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 146.8 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 484.77 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 103.8 MB in the beginning and 180.9 MB in the end (delta: -77.1 MB). Peak memory consumption was 21.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 50.81 ms. Allocated memory is still 203.9 MB. Free memory was 180.9 MB in the beginning and 178.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 525.37 ms. Allocated memory is still 203.9 MB. Free memory was 178.2 MB in the beginning and 150.1 MB in the end (delta: 28.2 MB). Peak memory consumption was 28.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1236.71 ms. Allocated memory was 203.9 MB in the beginning and 234.4 MB in the end (delta: 30.4 MB). Free memory was 149.4 MB in the beginning and 162.7 MB in the end (delta: -13.3 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 159]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 145, overapproximation of someBinaryArithmeticFLOAToperation at line 117, overapproximation of bitwiseAnd at line 116. 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; [L98-L101] static const float two25_log10 = 3.3554432000e+07, ivln10_log10 = 4.3429449201e-01, log10_2hi_log10 = 3.0102920532e-01, log10_2lo_log10 = 7.9034151668e-07; [L103] static const float zero = 0.0; [L154] float x = -1.0f / 0.0f; [L155] CALL, EXPR __ieee754_log10f(x) [L106] float y, z; [L107] __int32_t i, k, hx; [L110] ieee_float_shape_type gf_u; [L111] gf_u.value = (x) [L112] EXPR gf_u.word [L112] (hx) = gf_u.word [L115] k = 0 [L116] COND TRUE ((hx & 0x7fffffff) == 0) [L117] return -two25_log10 / zero; [L155] RET, EXPR __ieee754_log10f(x) [L155] float res = __ieee754_log10f(x); [L158] CALL, EXPR isnan_float(res) [L145] return x != x; [L158] RET, EXPR isnan_float(res) [L158] COND TRUE !isnan_float(res) [L159] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 60 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.1s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 63 SDtfs, 60 SDslu, 5 SDs, 0 SdLazy, 75 SolverSat, 16 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, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred 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, 43 NumberOfCodeBlocks, 43 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 1780 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...