/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=SHALLOWEST --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 language data_model -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_0832a.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:03:32,940 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:03:32,944 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:03:32,981 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:03:32,982 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:03:32,984 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:03:32,986 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:03:32,988 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:03:32,991 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:03:32,995 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:03:32,997 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:03:32,998 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:03:32,998 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:03:33,003 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:03:33,007 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:03:33,009 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:03:33,011 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:03:33,012 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:03:33,018 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:03:33,025 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:03:33,033 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:03:33,035 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:03:33,038 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:03:33,039 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:03:33,061 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:03:33,062 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:03:33,064 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:03:33,066 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:03:33,067 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:03:33,068 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:03:33,069 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:03:33,070 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:03:33,071 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:03:33,073 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:03:33,075 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:03:33,075 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:03:33,076 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:03:33,076 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:03:33,076 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:03:33,078 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:03:33,078 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:03:33,080 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 [2020-10-27 01:03:33,138 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:03:33,139 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:03:33,140 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:03:33,140 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:03:33,141 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:03:33,141 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:03:33,141 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:03:33,142 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:03:33,142 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:03:33,142 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:03:33,142 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:03:33,142 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:03:33,143 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:03:33,143 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:03:33,143 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:03:33,143 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:03:33,144 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:03:33,144 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:03:33,144 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:03:33,145 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:03:33,145 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:03:33,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:03:33,145 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:03:33,146 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:03:33,146 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:03:33,146 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:03:33,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:03:33,147 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:03:33,147 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:03:33,147 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:03:33,515 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:03:33,545 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:03:33,548 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:03:33,550 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:03:33,550 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:03:33,551 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_0832a.c [2020-10-27 01:03:33,632 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/69c7c8d51/0b27da1c6a144cca84b3bb9427772982/FLAGdd4671b53 [2020-10-27 01:03:34,269 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:03:34,269 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_0832a.c [2020-10-27 01:03:34,278 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/69c7c8d51/0b27da1c6a144cca84b3bb9427772982/FLAGdd4671b53 [2020-10-27 01:03:34,574 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/69c7c8d51/0b27da1c6a144cca84b3bb9427772982 [2020-10-27 01:03:34,577 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:03:34,584 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:03:34,585 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:03:34,586 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:03:34,590 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:03:34,590 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:03:34" (1/1) ... [2020-10-27 01:03:34,594 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@376c3dbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:03:34, skipping insertion in model container [2020-10-27 01:03:34,594 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:03:34" (1/1) ... [2020-10-27 01:03:34,604 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:03:34,626 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:03:34,831 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:03:34,843 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:03:34,884 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:03:34,909 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:03:34,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:03:34 WrapperNode [2020-10-27 01:03:34,910 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:03:34,911 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:03:34,911 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:03:34,911 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:03:34,927 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:03:34" (1/1) ... [2020-10-27 01:03:34,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:03:34" (1/1) ... [2020-10-27 01:03:34,940 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:03:34" (1/1) ... [2020-10-27 01:03:34,940 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:03:34" (1/1) ... [2020-10-27 01:03:34,957 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:03:34" (1/1) ... [2020-10-27 01:03:34,964 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:03:34" (1/1) ... [2020-10-27 01:03:34,967 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:03:34" (1/1) ... [2020-10-27 01:03:34,971 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:03:34,972 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:03:34,973 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:03:34,973 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:03:34,974 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:03:34" (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 [2020-10-27 01:03:35,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:03:35,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:03:35,067 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:03:35,068 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2020-10-27 01:03:35,068 INFO L138 BoogieDeclarations]: Found implementation of procedure __ieee754_expf [2020-10-27 01:03:35,069 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:03:35,069 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:03:35,070 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:03:35,070 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:03:35,070 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:03:35,071 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-10-27 01:03:35,072 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2020-10-27 01:03:35,072 INFO L130 BoogieDeclarations]: Found specification of procedure __ieee754_expf [2020-10-27 01:03:35,072 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-10-27 01:03:35,072 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:03:35,073 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:03:35,074 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-10-27 01:03:35,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:03:35,074 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:03:35,074 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:03:35,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:03:35,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2020-10-27 01:03:35,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:03:35,958 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:03:35,958 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-10-27 01:03:35,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:03:35 BoogieIcfgContainer [2020-10-27 01:03:35,960 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:03:35,962 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:03:35,962 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:03:35,966 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:03:35,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:03:34" (1/3) ... [2020-10-27 01:03:35,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14042f4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:03:35, skipping insertion in model container [2020-10-27 01:03:35,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:03:34" (2/3) ... [2020-10-27 01:03:35,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14042f4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:03:35, skipping insertion in model container [2020-10-27 01:03:35,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:03:35" (3/3) ... [2020-10-27 01:03:35,970 INFO L111 eAbstractionObserver]: Analyzing ICFG float_req_bl_0832a.c [2020-10-27 01:03:35,981 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:03:35,987 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:03:36,003 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:03:36,034 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:03:36,034 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:03:36,034 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:03:36,035 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:03:36,035 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:03:36,035 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:03:36,035 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:03:36,035 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:03:36,056 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states. [2020-10-27 01:03:36,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 01:03:36,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:03:36,064 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:03:36,064 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:03:36,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:03:36,072 INFO L82 PathProgramCache]: Analyzing trace with hash 886815608, now seen corresponding path program 1 times [2020-10-27 01:03:36,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:03:36,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130209294] [2020-10-27 01:03:36,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:03:36,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:03:36,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:03:36,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:03:36,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 01:03:36,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:03:36,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-27 01:03:36,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:03:36,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:03:36,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 01:03:36,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:03:36,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:03:36,704 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-10-27 01:03:36,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:03:36,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:03:36,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:03:36,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:03:36,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:03:36,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:03:36,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 01:03:36,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:03:36,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:03:36,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:03:36,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:03:36,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:03:36,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-27 01:03:36,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:03:36,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:03:36,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:03:36,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-27 01:03:36,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:03:36,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 01:03:36,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:03:36,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:03:36,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-27 01:03:36,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:03:36,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:03:36,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:03:36,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130209294] [2020-10-27 01:03:36,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:03:36,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:03:36,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695677164] [2020-10-27 01:03:36,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:03:36,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:03:36,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:03:36,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:03:36,860 INFO L87 Difference]: Start difference. First operand 49 states. Second operand 4 states. [2020-10-27 01:03:37,092 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-27 01:03:37,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:03:37,393 INFO L93 Difference]: Finished difference Result 87 states and 130 transitions. [2020-10-27 01:03:37,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 01:03:37,396 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-27 01:03:37,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:03:37,408 INFO L225 Difference]: With dead ends: 87 [2020-10-27 01:03:37,408 INFO L226 Difference]: Without dead ends: 42 [2020-10-27 01:03:37,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:03:37,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-27 01:03:37,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-27 01:03:37,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-27 01:03:37,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2020-10-27 01:03:37,465 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 17 [2020-10-27 01:03:37,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:03:37,465 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2020-10-27 01:03:37,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:03:37,466 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2020-10-27 01:03:37,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:03:37,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:03:37,467 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:03:37,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:03:37,468 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:03:37,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:03:37,469 INFO L82 PathProgramCache]: Analyzing trace with hash -769349610, now seen corresponding path program 1 times [2020-10-27 01:03:37,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:03:37,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787666232] [2020-10-27 01:03:37,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:03:37,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 01:03:37,578 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 01:03:37,578 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 01:03:37,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:03:37,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 01:03:37 BoogieIcfgContainer [2020-10-27 01:03:37,613 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 01:03:37,615 INFO L168 Benchmark]: Toolchain (without parser) took 3035.58 ms. Allocated memory was 161.5 MB in the beginning and 207.6 MB in the end (delta: 46.1 MB). Free memory was 135.5 MB in the beginning and 174.5 MB in the end (delta: -39.0 MB). Peak memory consumption was 7.8 MB. Max. memory is 8.0 GB. [2020-10-27 01:03:37,616 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 161.5 MB. Free memory is still 134.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 01:03:37,617 INFO L168 Benchmark]: CACSL2BoogieTranslator took 324.67 ms. Allocated memory is still 161.5 MB. Free memory was 134.9 MB in the beginning and 123.2 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2020-10-27 01:03:37,618 INFO L168 Benchmark]: Boogie Preprocessor took 60.39 ms. Allocated memory is still 161.5 MB. Free memory was 123.2 MB in the beginning and 121.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-10-27 01:03:37,619 INFO L168 Benchmark]: RCFGBuilder took 988.00 ms. Allocated memory is still 161.5 MB. Free memory was 121.1 MB in the beginning and 128.7 MB in the end (delta: -7.6 MB). Peak memory consumption was 13.7 MB. Max. memory is 8.0 GB. [2020-10-27 01:03:37,620 INFO L168 Benchmark]: TraceAbstraction took 1651.09 ms. Allocated memory was 161.5 MB in the beginning and 207.6 MB in the end (delta: 46.1 MB). Free memory was 128.2 MB in the beginning and 174.5 MB in the end (delta: -46.3 MB). Peak memory consumption was 1.4 MB. Max. memory is 8.0 GB. [2020-10-27 01:03:37,624 INFO L339 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 161.5 MB. Free memory is still 134.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 324.67 ms. Allocated memory is still 161.5 MB. Free memory was 134.9 MB in the beginning and 123.2 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 60.39 ms. Allocated memory is still 161.5 MB. Free memory was 123.2 MB in the beginning and 121.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 988.00 ms. Allocated memory is still 161.5 MB. Free memory was 121.1 MB in the beginning and 128.7 MB in the end (delta: -7.6 MB). Peak memory consumption was 13.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1651.09 ms. Allocated memory was 161.5 MB in the beginning and 207.6 MB in the end (delta: 46.1 MB). Free memory was 128.2 MB in the beginning and 174.5 MB in the end (delta: -46.3 MB). Peak memory consumption was 1.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 3]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 123, overapproximation of someUnaryDOUBLEoperation at line 21, overapproximation of bitwiseAnd at line 48, overapproximation of someBinaryArithmeticFLOAToperation at line 52. Possible FailurePath: [L17-L36] static const float one_exp = 1.0, halF_exp[2] = { 0.5, -0.5, }, huge_exp = 1.0e+30, twom100_exp = 7.8886090522e-31, ln2HI_exp[2] = { 6.9313812256e-01, -6.9313812256e-01, }, ln2LO_exp[2] = { 9.0580006145e-06, -9.0580006145e-06, }, invln2_exp = 1.4426950216e+00, P1_exp = 1.6666667163e-01, P2_exp = -2.7777778450e-03, P3_exp = 6.6137559770e-05, P4_exp = -1.6533901999e-06, P5_exp = 4.1381369442e-08; [L119] float x = 0.0f; [L120] CALL, EXPR __ieee754_expf(x) [L39] float y, hi, lo, c, t; [L40] __int32_t k = 0, xsb, sx; [L41] __uint32_t hx; [L44] ieee_float_shape_type gf_u; [L45] gf_u.value = (x) [L46] EXPR gf_u.word [L46] (sx) = gf_u.word [L48] xsb = (sx >> 31) & 1 [L49] hx = sx & 0x7fffffff [L51] COND TRUE ((hx) > 0x7f800000L) [L52] return x + x; [L120] RET, EXPR __ieee754_expf(x) [L120] float res = __ieee754_expf(x); [L123] COND TRUE res != 1.0f [L124] CALL reach_error() [L3] __assert_fail("0", "float_req_bl_0832a.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 52 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 54 SDtfs, 6 SDslu, 44 SDs, 0 SdLazy, 56 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred 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, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 35 NumberOfCodeBlocks, 35 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 16 ConstructedInterpolants, 0 QuantifiedInterpolants, 1648 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...