/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=LOWLEXORDER -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1071.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 18:38:53,165 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 18:38:53,167 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 18:38:53,192 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 18:38:53,192 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 18:38:53,194 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 18:38:53,195 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 18:38:53,197 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 18:38:53,198 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 18:38:53,199 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 18:38:53,200 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 18:38:53,201 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 18:38:53,202 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 18:38:53,203 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 18:38:53,204 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 18:38:53,205 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 18:38:53,206 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 18:38:53,206 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 18:38:53,208 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 18:38:53,210 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 18:38:53,211 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 18:38:53,212 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 18:38:53,213 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 18:38:53,214 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 18:38:53,217 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 18:38:53,217 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 18:38:53,217 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 18:38:53,218 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 18:38:53,218 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 18:38:53,219 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 18:38:53,220 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 18:38:53,220 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 18:38:53,221 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 18:38:53,222 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 18:38:53,223 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 18:38:53,223 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 18:38:53,224 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 18:38:53,224 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 18:38:53,224 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 18:38:53,225 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 18:38:53,226 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 18:38:53,227 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 18:38:53,249 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 18:38:53,249 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 18:38:53,250 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 18:38:53,250 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 18:38:53,251 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 18:38:53,251 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 18:38:53,251 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 18:38:53,251 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 18:38:53,251 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 18:38:53,252 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 18:38:53,252 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 18:38:53,252 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 18:38:53,252 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 18:38:53,252 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 18:38:53,252 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 18:38:53,253 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 18:38:53,253 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 18:38:53,253 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 18:38:53,253 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 18:38:53,254 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 18:38:53,254 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 18:38:53,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 18:38:53,254 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 18:38:53,254 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 18:38:53,255 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 18:38:53,255 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 18:38:53,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 18:38:53,255 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 18:38:53,255 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 18:38:53,255 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=LOWLEXORDER; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=LOWLEXORDER; [2020-08-18 18:38:53,585 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 18:38:53,598 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 18:38:53,601 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 18:38:53,603 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 18:38:53,604 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 18:38:53,604 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1071.c [2020-08-18 18:38:53,681 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9bfbe45d8/95ba0e8c1c554ef6ab9155d852dae646/FLAG504e528e6 [2020-08-18 18:38:54,130 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 18:38:54,131 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1071.c [2020-08-18 18:38:54,139 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9bfbe45d8/95ba0e8c1c554ef6ab9155d852dae646/FLAG504e528e6 [2020-08-18 18:38:54,499 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9bfbe45d8/95ba0e8c1c554ef6ab9155d852dae646 [2020-08-18 18:38:54,508 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 18:38:54,509 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 18:38:54,510 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 18:38:54,511 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 18:38:54,515 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 18:38:54,516 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:38:54" (1/1) ... [2020-08-18 18:38:54,519 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6dd452c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:38:54, skipping insertion in model container [2020-08-18 18:38:54,520 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 06:38:54" (1/1) ... [2020-08-18 18:38:54,529 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 18:38:54,545 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 18:38:54,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:38:54,728 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 18:38:54,756 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 18:38:54,781 INFO L208 MainTranslator]: Completed translation [2020-08-18 18:38:54,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:38:54 WrapperNode [2020-08-18 18:38:54,782 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 18:38:54,783 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 18:38:54,783 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 18:38:54,783 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 18:38:54,890 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:38:54" (1/1) ... [2020-08-18 18:38:54,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:38:54" (1/1) ... [2020-08-18 18:38:54,906 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:38:54" (1/1) ... [2020-08-18 18:38:54,907 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:38:54" (1/1) ... [2020-08-18 18:38:54,932 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:38:54" (1/1) ... [2020-08-18 18:38:54,942 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:38:54" (1/1) ... [2020-08-18 18:38:54,945 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:38:54" (1/1) ... [2020-08-18 18:38:54,948 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 18:38:54,949 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 18:38:54,949 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 18:38:54,949 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 18:38:54,950 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:38:54" (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 18:38:55,016 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 18:38:55,017 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 18:38:55,017 INFO L138 BoogieDeclarations]: Found implementation of procedure trunc_float [2020-08-18 18:38:55,017 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2020-08-18 18:38:55,017 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 18:38:55,018 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 18:38:55,018 INFO L130 BoogieDeclarations]: Found specification of procedure trunc_float [2020-08-18 18:38:55,018 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 18:38:55,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-18 18:38:55,018 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 18:38:55,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 18:38:55,019 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 18:38:55,019 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-18 18:38:55,019 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2020-08-18 18:38:55,019 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 18:38:55,019 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 18:38:55,020 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 18:38:55,371 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 18:38:55,371 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-08-18 18:38:55,375 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:38:55 BoogieIcfgContainer [2020-08-18 18:38:55,375 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 18:38:55,380 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 18:38:55,381 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 18:38:55,384 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 18:38:55,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 06:38:54" (1/3) ... [2020-08-18 18:38:55,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66adbec1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:38:55, skipping insertion in model container [2020-08-18 18:38:55,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 06:38:54" (2/3) ... [2020-08-18 18:38:55,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66adbec1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 06:38:55, skipping insertion in model container [2020-08-18 18:38:55,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 06:38:55" (3/3) ... [2020-08-18 18:38:55,387 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1071.c [2020-08-18 18:38:55,398 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 18:38:55,405 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 18:38:55,418 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 18:38:55,437 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 18:38:55,437 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 18:38:55,437 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 18:38:55,438 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 18:38:55,438 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 18:38:55,438 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 18:38:55,438 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 18:38:55,439 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 18:38:55,455 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-08-18 18:38:55,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 18:38:55,461 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:38:55,462 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:38:55,462 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:38:55,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:38:55,467 INFO L82 PathProgramCache]: Analyzing trace with hash 846806543, now seen corresponding path program 1 times [2020-08-18 18:38:55,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:38:55,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272959459] [2020-08-18 18:38:55,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:38:55,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:38:55,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 18:38:55,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:38:55,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 18:38:55,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:38:55,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-18 18:38:55,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 18:38:55,697 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 18:38:55,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272959459] [2020-08-18 18:38:55,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 18:38:55,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 18:38:55,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839233477] [2020-08-18 18:38:55,705 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 18:38:55,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 18:38:55,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 18:38:55,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 18:38:55,718 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 4 states. [2020-08-18 18:38:55,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 18:38:55,888 INFO L93 Difference]: Finished difference Result 60 states and 78 transitions. [2020-08-18 18:38:55,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 18:38:55,891 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-08-18 18:38:55,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 18:38:55,901 INFO L225 Difference]: With dead ends: 60 [2020-08-18 18:38:55,902 INFO L226 Difference]: Without dead ends: 30 [2020-08-18 18:38:55,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 18:38:55,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-18 18:38:55,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-18 18:38:55,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 18:38:55,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-08-18 18:38:55,946 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 22 [2020-08-18 18:38:55,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 18:38:55,947 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-08-18 18:38:55,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 18:38:55,947 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-08-18 18:38:55,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 18:38:55,948 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 18:38:55,949 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 18:38:55,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 18:38:55,949 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 18:38:55,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 18:38:55,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1446285465, now seen corresponding path program 1 times [2020-08-18 18:38:55,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 18:38:55,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149934515] [2020-08-18 18:38:55,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 18:38:56,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 18:38:56,028 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 18:38:56,029 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 18:38:56,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 18:38:56,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 06:38:56 BoogieIcfgContainer [2020-08-18 18:38:56,051 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 18:38:56,053 INFO L168 Benchmark]: Toolchain (without parser) took 1543.16 ms. Allocated memory was 144.2 MB in the beginning and 201.3 MB in the end (delta: 57.1 MB). Free memory was 100.3 MB in the beginning and 120.0 MB in the end (delta: -19.7 MB). Peak memory consumption was 37.4 MB. Max. memory is 7.1 GB. [2020-08-18 18:38:56,054 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 144.2 MB. Free memory was 118.8 MB in the beginning and 118.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-18 18:38:56,055 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.15 ms. Allocated memory is still 144.2 MB. Free memory was 100.1 MB in the beginning and 89.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-08-18 18:38:56,056 INFO L168 Benchmark]: Boogie Preprocessor took 165.54 ms. Allocated memory was 144.2 MB in the beginning and 201.3 MB in the end (delta: 57.1 MB). Free memory was 89.4 MB in the beginning and 179.1 MB in the end (delta: -89.7 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-08-18 18:38:56,057 INFO L168 Benchmark]: RCFGBuilder took 426.67 ms. Allocated memory is still 201.3 MB. Free memory was 178.4 MB in the beginning and 160.2 MB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 7.1 GB. [2020-08-18 18:38:56,058 INFO L168 Benchmark]: TraceAbstraction took 670.28 ms. Allocated memory is still 201.3 MB. Free memory was 159.5 MB in the beginning and 120.0 MB in the end (delta: 39.5 MB). Peak memory consumption was 39.5 MB. Max. memory is 7.1 GB. [2020-08-18 18:38:56,062 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 144.2 MB. Free memory was 118.8 MB in the beginning and 118.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 272.15 ms. Allocated memory is still 144.2 MB. Free memory was 100.1 MB in the beginning and 89.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 165.54 ms. Allocated memory was 144.2 MB in the beginning and 201.3 MB in the end (delta: 57.1 MB). Free memory was 89.4 MB in the beginning and 179.1 MB in the end (delta: -89.7 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 426.67 ms. Allocated memory is still 201.3 MB. Free memory was 178.4 MB in the beginning and 160.2 MB in the end (delta: 18.1 MB). Peak memory consumption was 18.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 670.28 ms. Allocated memory is still 201.3 MB. Free memory was 159.5 MB in the beginning and 120.0 MB in the end (delta: 39.5 MB). Peak memory consumption was 39.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 57]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 44, overapproximation of someBinaryArithmeticFLOAToperation at line 38, overapproximation of bitwiseAnd at line 19. Possible FailurePath: [L52] float x = 0.0f / 0.0f; [L53] CALL, EXPR trunc_float(x) [L13] __int32_t signbit, w, exponent_less_127; [L15] ieee_float_shape_type gf_u; [L16] gf_u.value = (x) [L17] EXPR gf_u.word [L17] (w) = gf_u.word [L19] signbit = w & 0x80000000 [L20] exponent_less_127 = ((w & 0x7f800000) >> 23) - 127 [L21] COND FALSE !(exponent_less_127 < 23) [L37] COND TRUE exponent_less_127 == 255 [L38] return x + x; [L53] RET, EXPR trunc_float(x) [L53] float res = trunc_float(x); [L56] CALL, EXPR isnan_float(res) [L44] return x != x; [L56] RET, EXPR isnan_float(res) [L56] COND TRUE !isnan_float(res) [L57] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 30 SDtfs, 26 SDslu, 5 SDs, 0 SdLazy, 34 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred 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, 45 NumberOfCodeBlocks, 45 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 21 ConstructedInterpolants, 0 QuantifiedInterpolants, 882 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...