/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 --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_0730b.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 17:02:09,714 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 17:02:09,718 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 17:02:09,745 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 17:02:09,745 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 17:02:09,746 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 17:02:09,748 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 17:02:09,749 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 17:02:09,751 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 17:02:09,752 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 17:02:09,753 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 17:02:09,754 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 17:02:09,754 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 17:02:09,755 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 17:02:09,757 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 17:02:09,758 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 17:02:09,759 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 17:02:09,760 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 17:02:09,762 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 17:02:09,764 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 17:02:09,765 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 17:02:09,766 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 17:02:09,768 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 17:02:09,769 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 17:02:09,772 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 17:02:09,772 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 17:02:09,772 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 17:02:09,773 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 17:02:09,774 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 17:02:09,775 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 17:02:09,775 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 17:02:09,776 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 17:02:09,777 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 17:02:09,778 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 17:02:09,781 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 17:02:09,782 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 17:02:09,782 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 17:02:09,783 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 17:02:09,783 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 17:02:09,784 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 17:02:09,784 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 17:02:09,785 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 [2020-08-18 17:02:09,807 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 17:02:09,808 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 17:02:09,809 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 17:02:09,809 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 17:02:09,809 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 17:02:09,810 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 17:02:09,810 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 17:02:09,810 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 17:02:09,810 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 17:02:09,810 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 17:02:09,810 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 17:02:09,811 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 17:02:09,811 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 17:02:09,811 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 17:02:09,811 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 17:02:09,811 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 17:02:09,812 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 17:02:09,812 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 17:02:09,812 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 17:02:09,812 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 17:02:09,812 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 17:02:09,813 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 17:02:09,813 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 17:02:09,813 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 17:02:09,813 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 17:02:09,813 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 17:02:09,814 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 17:02:09,814 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 17:02:09,814 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 17:02:09,814 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.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLEST; [2020-08-18 17:02:10,118 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 17:02:10,131 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 17:02:10,134 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 17:02:10,136 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 17:02:10,136 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 17:02:10,137 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_0730b.c [2020-08-18 17:02:10,204 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e6c037728/f96c0d1ee8b042e590e5a1ac32855a0e/FLAG52ee33ae5 [2020-08-18 17:02:10,640 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 17:02:10,642 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_0730b.c [2020-08-18 17:02:10,650 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e6c037728/f96c0d1ee8b042e590e5a1ac32855a0e/FLAG52ee33ae5 [2020-08-18 17:02:10,997 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e6c037728/f96c0d1ee8b042e590e5a1ac32855a0e [2020-08-18 17:02:11,009 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 17:02:11,013 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 17:02:11,016 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 17:02:11,017 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 17:02:11,020 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 17:02:11,022 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:02:10" (1/1) ... [2020-08-18 17:02:11,026 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17f7827f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:02:11, skipping insertion in model container [2020-08-18 17:02:11,026 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 05:02:10" (1/1) ... [2020-08-18 17:02:11,035 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 17:02:11,063 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 17:02:11,339 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:02:11,343 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 17:02:11,376 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 17:02:11,488 INFO L208 MainTranslator]: Completed translation [2020-08-18 17:02:11,488 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:02:11 WrapperNode [2020-08-18 17:02:11,488 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 17:02:11,489 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 17:02:11,489 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 17:02:11,489 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 17:02:11,499 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:02:11" (1/1) ... [2020-08-18 17:02:11,499 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:02:11" (1/1) ... [2020-08-18 17:02:11,509 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:02:11" (1/1) ... [2020-08-18 17:02:11,510 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:02:11" (1/1) ... [2020-08-18 17:02:11,522 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:02:11" (1/1) ... [2020-08-18 17:02:11,528 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:02:11" (1/1) ... [2020-08-18 17:02:11,531 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:02:11" (1/1) ... [2020-08-18 17:02:11,534 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 17:02:11,534 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 17:02:11,534 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 17:02:11,534 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 17:02:11,535 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:02:11" (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 [2020-08-18 17:02:11,598 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 17:02:11,599 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 17:02:11,599 INFO L138 BoogieDeclarations]: Found implementation of procedure __ieee754_sqrtf [2020-08-18 17:02:11,599 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-08-18 17:02:11,599 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 17:02:11,599 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 17:02:11,600 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-08-18 17:02:11,600 INFO L130 BoogieDeclarations]: Found specification of procedure __ieee754_sqrtf [2020-08-18 17:02:11,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 17:02:11,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-18 17:02:11,600 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 17:02:11,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 17:02:11,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 17:02:11,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-18 17:02:11,601 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-08-18 17:02:11,601 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 17:02:11,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 17:02:11,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 17:02:11,965 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 17:02:11,965 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-08-18 17:02:11,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:02:11 BoogieIcfgContainer [2020-08-18 17:02:11,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 17:02:11,971 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 17:02:11,971 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 17:02:11,974 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 17:02:11,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 05:02:10" (1/3) ... [2020-08-18 17:02:11,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48050f81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:02:11, skipping insertion in model container [2020-08-18 17:02:11,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 05:02:11" (2/3) ... [2020-08-18 17:02:11,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48050f81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 05:02:11, skipping insertion in model container [2020-08-18 17:02:11,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 05:02:11" (3/3) ... [2020-08-18 17:02:11,978 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_0730b.c [2020-08-18 17:02:11,989 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 17:02:11,997 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 17:02:12,011 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 17:02:12,036 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 17:02:12,036 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 17:02:12,037 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 17:02:12,037 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 17:02:12,037 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 17:02:12,037 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 17:02:12,038 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 17:02:12,038 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 17:02:12,057 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2020-08-18 17:02:12,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-18 17:02:12,063 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:02:12,064 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:02:12,064 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:02:12,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:02:12,069 INFO L82 PathProgramCache]: Analyzing trace with hash 380065484, now seen corresponding path program 1 times [2020-08-18 17:02:12,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:02:12,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2142423527] [2020-08-18 17:02:12,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:02:12,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:12,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 17:02:12,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:12,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 17:02:12,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 17:02:12,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 17:02:12,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2142423527] [2020-08-18 17:02:12,299 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 17:02:12,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 17:02:12,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761818872] [2020-08-18 17:02:12,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 17:02:12,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 17:02:12,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 17:02:12,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 17:02:12,323 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 4 states. [2020-08-18 17:02:12,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 17:02:12,571 INFO L93 Difference]: Finished difference Result 92 states and 133 transitions. [2020-08-18 17:02:12,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 17:02:12,573 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-08-18 17:02:12,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 17:02:12,583 INFO L225 Difference]: With dead ends: 92 [2020-08-18 17:02:12,584 INFO L226 Difference]: Without dead ends: 46 [2020-08-18 17:02:12,588 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 [2020-08-18 17:02:12,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-18 17:02:12,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-08-18 17:02:12,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-18 17:02:12,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2020-08-18 17:02:12,635 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 17 [2020-08-18 17:02:12,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 17:02:12,636 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2020-08-18 17:02:12,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 17:02:12,636 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2020-08-18 17:02:12,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 17:02:12,637 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 17:02:12,637 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 17:02:12,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 17:02:12,638 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 17:02:12,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 17:02:12,639 INFO L82 PathProgramCache]: Analyzing trace with hash 2048303218, now seen corresponding path program 1 times [2020-08-18 17:02:12,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 17:02:12,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030474497] [2020-08-18 17:02:12,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 17:02:12,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 17:02:12,684 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 17:02:12,685 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 17:02:12,690 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 17:02:12,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 05:02:12 BoogieIcfgContainer [2020-08-18 17:02:12,711 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 17:02:12,714 INFO L168 Benchmark]: Toolchain (without parser) took 1700.42 ms. Allocated memory was 136.8 MB in the beginning and 200.3 MB in the end (delta: 63.4 MB). Free memory was 99.6 MB in the beginning and 104.7 MB in the end (delta: -5.0 MB). Peak memory consumption was 58.4 MB. Max. memory is 7.1 GB. [2020-08-18 17:02:12,715 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 136.8 MB. Free memory was 118.4 MB in the beginning and 118.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 17:02:12,717 INFO L168 Benchmark]: CACSL2BoogieTranslator took 472.10 ms. Allocated memory was 136.8 MB in the beginning and 200.3 MB in the end (delta: 63.4 MB). Free memory was 99.2 MB in the beginning and 177.9 MB in the end (delta: -78.7 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. [2020-08-18 17:02:12,717 INFO L168 Benchmark]: Boogie Preprocessor took 44.80 ms. Allocated memory is still 200.3 MB. Free memory was 177.9 MB in the beginning and 175.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. [2020-08-18 17:02:12,718 INFO L168 Benchmark]: RCFGBuilder took 435.30 ms. Allocated memory is still 200.3 MB. Free memory was 175.4 MB in the beginning and 152.8 MB in the end (delta: 22.6 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. [2020-08-18 17:02:12,719 INFO L168 Benchmark]: TraceAbstraction took 740.78 ms. Allocated memory is still 200.3 MB. Free memory was 152.8 MB in the beginning and 104.7 MB in the end (delta: 48.1 MB). Peak memory consumption was 48.1 MB. Max. memory is 7.1 GB. [2020-08-18 17:02:12,723 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 136.8 MB. Free memory was 118.4 MB in the beginning and 118.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 472.10 ms. Allocated memory was 136.8 MB in the beginning and 200.3 MB in the end (delta: 63.4 MB). Free memory was 99.2 MB in the beginning and 177.9 MB in the end (delta: -78.7 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 44.80 ms. Allocated memory is still 200.3 MB. Free memory was 177.9 MB in the beginning and 175.4 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 435.30 ms. Allocated memory is still 200.3 MB. Free memory was 175.4 MB in the beginning and 152.8 MB in the end (delta: 22.6 MB). Peak memory consumption was 22.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 740.78 ms. Allocated memory is still 200.3 MB. Free memory was 152.8 MB in the beginning and 104.7 MB in the end (delta: 48.1 MB). Peak memory consumption was 48.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 106]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 105, overapproximation of bitwiseAnd at line 24, overapproximation of someBinaryArithmeticFLOAToperation at line 27. Possible FailurePath: [L12] static const float one_sqrt = 1.0, tiny_sqrt = 1.0e-30; [L101] float x = 0.0f; [L102] CALL, EXPR __ieee754_sqrtf(x) [L15] float z; [L16] __uint32_t r, hx; [L17] __int32_t ix, s, q, m, t, i; [L20] ieee_float_shape_type gf_u; [L21] gf_u.value = (x) [L22] EXPR gf_u.word [L22] (ix) = gf_u.word [L24] hx = ix & 0x7fffffff [L26] COND TRUE !((hx) < 0x7f800000L) [L27] return x * x + x; [L102] RET, EXPR __ieee754_sqrtf(x) [L102] float res = __ieee754_sqrtf(x); [L105] EXPR res == 0.0f && __signbit_float(res) == 0 [L105] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L106] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 50 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.6s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 55 SDtfs, 50 SDslu, 5 SDs, 0 SdLazy, 60 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=50occurred 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, 0.1s InterpolantComputationTime, 35 NumberOfCodeBlocks, 35 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 688 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...