/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=BIGGEST --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_1092a.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 15:33:11,247 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 15:33:11,250 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 15:33:11,288 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 15:33:11,288 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 15:33:11,297 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 15:33:11,298 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 15:33:11,301 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 15:33:11,304 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 15:33:11,307 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 15:33:11,308 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 15:33:11,310 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 15:33:11,310 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 15:33:11,313 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 15:33:11,316 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 15:33:11,318 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 15:33:11,320 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 15:33:11,322 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 15:33:11,323 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 15:33:11,331 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 15:33:11,334 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 15:33:11,335 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 15:33:11,336 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 15:33:11,337 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 15:33:11,347 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 15:33:11,347 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 15:33:11,348 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 15:33:11,351 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 15:33:11,351 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 15:33:11,352 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 15:33:11,352 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 15:33:11,354 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 15:33:11,355 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 15:33:11,356 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 15:33:11,357 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 15:33:11,357 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 15:33:11,358 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 15:33:11,358 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 15:33:11,358 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 15:33:11,359 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 15:33:11,360 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 15:33:11,361 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 [2020-10-12 15:33:11,402 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 15:33:11,402 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 15:33:11,404 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 15:33:11,404 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 15:33:11,405 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 15:33:11,405 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 15:33:11,405 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 15:33:11,405 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 15:33:11,405 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 15:33:11,406 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 15:33:11,407 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 15:33:11,407 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 15:33:11,407 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 15:33:11,407 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 15:33:11,408 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 15:33:11,408 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 15:33:11,408 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 15:33:11,408 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 15:33:11,408 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 15:33:11,409 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 15:33:11,409 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 15:33:11,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 15:33:11,409 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 15:33:11,409 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 15:33:11,409 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 15:33:11,410 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 15:33:11,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 15:33:11,410 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 15:33:11,410 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 15:33:11,410 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 15:33:11,719 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 15:33:11,731 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 15:33:11,734 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 15:33:11,735 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 15:33:11,736 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 15:33:11,736 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1092a.c [2020-10-12 15:33:11,790 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/832a1e0b9/c0f8469d371b4076bacd3da809facc52/FLAG324a4737e [2020-10-12 15:33:12,247 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 15:33:12,248 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1092a.c [2020-10-12 15:33:12,256 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/832a1e0b9/c0f8469d371b4076bacd3da809facc52/FLAG324a4737e [2020-10-12 15:33:12,611 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/832a1e0b9/c0f8469d371b4076bacd3da809facc52 [2020-10-12 15:33:12,619 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 15:33:12,621 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 15:33:12,622 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 15:33:12,622 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 15:33:12,626 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 15:33:12,627 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:33:12" (1/1) ... [2020-10-12 15:33:12,630 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5badac6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:33:12, skipping insertion in model container [2020-10-12 15:33:12,630 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 03:33:12" (1/1) ... [2020-10-12 15:33:12,638 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 15:33:12,659 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 15:33:12,926 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:33:12,930 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 15:33:12,961 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 15:33:13,072 INFO L208 MainTranslator]: Completed translation [2020-10-12 15:33:13,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:33:13 WrapperNode [2020-10-12 15:33:13,073 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 15:33:13,074 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 15:33:13,074 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 15:33:13,074 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 15:33:13,088 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:33:13" (1/1) ... [2020-10-12 15:33:13,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:33:13" (1/1) ... [2020-10-12 15:33:13,098 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:33:13" (1/1) ... [2020-10-12 15:33:13,099 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:33:13" (1/1) ... [2020-10-12 15:33:13,109 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:33:13" (1/1) ... [2020-10-12 15:33:13,118 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:33:13" (1/1) ... [2020-10-12 15:33:13,120 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:33:13" (1/1) ... [2020-10-12 15:33:13,123 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 15:33:13,123 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 15:33:13,124 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 15:33:13,124 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 15:33:13,125 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:33:13" (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 [2020-10-12 15:33:13,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 15:33:13,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 15:33:13,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ceil_float [2020-10-12 15:33:13,182 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-10-12 15:33:13,183 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 15:33:13,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 15:33:13,183 INFO L130 BoogieDeclarations]: Found specification of procedure ceil_float [2020-10-12 15:33:13,183 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 15:33:13,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-12 15:33:13,183 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 15:33:13,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 15:33:13,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 15:33:13,184 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-10-12 15:33:13,184 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-10-12 15:33:13,184 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 15:33:13,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 15:33:13,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 15:33:13,516 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 15:33:13,516 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-12 15:33:13,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:33:13 BoogieIcfgContainer [2020-10-12 15:33:13,521 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 15:33:13,522 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 15:33:13,523 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 15:33:13,526 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 15:33:13,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 03:33:12" (1/3) ... [2020-10-12 15:33:13,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67cb77b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:33:13, skipping insertion in model container [2020-10-12 15:33:13,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 03:33:13" (2/3) ... [2020-10-12 15:33:13,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67cb77b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 03:33:13, skipping insertion in model container [2020-10-12 15:33:13,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 03:33:13" (3/3) ... [2020-10-12 15:33:13,531 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1092a.c [2020-10-12 15:33:13,559 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 15:33:13,573 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 15:33:13,595 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 15:33:13,624 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 15:33:13,624 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 15:33:13,625 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 15:33:13,625 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 15:33:13,625 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 15:33:13,625 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 15:33:13,625 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 15:33:13,625 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 15:33:13,643 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-10-12 15:33:13,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-12 15:33:13,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:33:13,652 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:33:13,653 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:33:13,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:33:13,658 INFO L82 PathProgramCache]: Analyzing trace with hash 263185431, now seen corresponding path program 1 times [2020-10-12 15:33:13,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:33:13,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1422235327] [2020-10-12 15:33:13,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:33:13,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:33:13,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:33:13,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:33:13,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 15:33:13,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:33:13,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 118 [2020-10-12 15:33:13,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:33:13,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:33:13,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-12 15:33:13,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:33:13,899 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 15:33:13,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 15:33:13,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:33:13,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:33:14,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:33:14,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 15:33:14,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:33:14,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 15:33:14,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:33:14,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:33:14,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 15:33:14,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:33:14,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:33:14,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-12 15:33:14,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 15:33:14,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 15:33:14,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 15:33:14,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-12 15:33:14,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 15:33:14,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 33 [2020-10-12 15:33:14,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 15:33:14,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 15:33:14,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-12 15:33:14,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 15:33:14,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 15:33:14,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 15:33:14,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1422235327] [2020-10-12 15:33:14,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 15:33:14,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 15:33:14,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373956457] [2020-10-12 15:33:14,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 15:33:14,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 15:33:14,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 15:33:14,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 15:33:14,105 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 4 states. [2020-10-12 15:33:14,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 15:33:14,298 INFO L93 Difference]: Finished difference Result 78 states and 111 transitions. [2020-10-12 15:33:14,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 15:33:14,299 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-12 15:33:14,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 15:33:14,310 INFO L225 Difference]: With dead ends: 78 [2020-10-12 15:33:14,310 INFO L226 Difference]: Without dead ends: 39 [2020-10-12 15:33:14,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 15:33:14,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-12 15:33:14,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-12 15:33:14,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-12 15:33:14,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2020-10-12 15:33:14,361 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 18 [2020-10-12 15:33:14,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 15:33:14,361 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2020-10-12 15:33:14,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 15:33:14,362 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2020-10-12 15:33:14,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-12 15:33:14,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 15:33:14,363 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 15:33:14,364 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 15:33:14,364 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 15:33:14,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 15:33:14,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1491196875, now seen corresponding path program 1 times [2020-10-12 15:33:14,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 15:33:14,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951288783] [2020-10-12 15:33:14,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 15:33:14,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-12 15:33:14,448 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-12 15:33:14,448 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-12 15:33:14,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 15:33:14,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.10 03:33:14 BoogieIcfgContainer [2020-10-12 15:33:14,494 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-12 15:33:14,500 INFO L168 Benchmark]: Toolchain (without parser) took 1875.34 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 101.5 MB in the beginning and 101.7 MB in the end (delta: -246.6 kB). Peak memory consumption was 62.7 MB. Max. memory is 7.1 GB. [2020-10-12 15:33:14,502 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-10-12 15:33:14,504 INFO L168 Benchmark]: CACSL2BoogieTranslator took 451.59 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 101.3 MB in the beginning and 180.5 MB in the end (delta: -79.3 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. [2020-10-12 15:33:14,505 INFO L168 Benchmark]: Boogie Preprocessor took 49.04 ms. Allocated memory is still 202.4 MB. Free memory was 180.5 MB in the beginning and 178.2 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-10-12 15:33:14,506 INFO L168 Benchmark]: RCFGBuilder took 397.90 ms. Allocated memory is still 202.4 MB. Free memory was 178.2 MB in the beginning and 157.9 MB in the end (delta: 20.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. [2020-10-12 15:33:14,507 INFO L168 Benchmark]: TraceAbstraction took 971.79 ms. Allocated memory is still 202.4 MB. Free memory was 157.2 MB in the beginning and 101.7 MB in the end (delta: 55.5 MB). Peak memory consumption was 55.5 MB. Max. memory is 7.1 GB. [2020-10-12 15:33:14,518 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 451.59 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 101.3 MB in the beginning and 180.5 MB in the end (delta: -79.3 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 49.04 ms. Allocated memory is still 202.4 MB. Free memory was 180.5 MB in the beginning and 178.2 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 397.90 ms. Allocated memory is still 202.4 MB. Free memory was 178.2 MB in the beginning and 157.9 MB in the end (delta: 20.3 MB). Peak memory consumption was 20.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 971.79 ms. Allocated memory is still 202.4 MB. Free memory was 157.2 MB in the beginning and 101.7 MB in the end (delta: 55.5 MB). Peak memory consumption was 55.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 81]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 80, overapproximation of bitwiseAnd at line 21, overapproximation of someUnaryFLOAToperation at line 76, overapproximation of someBinaryArithmeticFLOAToperation at line 44. Possible FailurePath: [L11] static const float huge_ceil = 1.0e30; [L76] float x = -0.0f; [L77] CALL, EXPR ceil_float(x) [L14] __int32_t i0, j0; [L15] __uint32_t i, ix; [L17] ieee_float_shape_type gf_u; [L18] gf_u.value = (x) [L19] EXPR gf_u.word [L19] (i0) = gf_u.word [L21] ix = (i0 & 0x7fffffff) [L22] j0 = (ix >> 23) - 0x7f [L23] COND FALSE !(j0 < 23) [L43] COND TRUE !((ix) < 0x7f800000L) [L44] return x + x; [L77] RET, EXPR ceil_float(x) [L77] float res = ceil_float(x); [L80] EXPR res == -0.0f && __signbit_float(res) == 1 [L80] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L81] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 46 SDtfs, 41 SDslu, 5 SDs, 0 SdLazy, 51 SolverSat, 11 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, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred 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, 37 NumberOfCodeBlocks, 37 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 697 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...