/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_1031.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 04:20:25,409 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 04:20:25,412 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 04:20:25,435 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 04:20:25,436 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 04:20:25,437 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 04:20:25,438 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 04:20:25,440 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 04:20:25,441 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 04:20:25,442 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 04:20:25,443 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 04:20:25,445 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 04:20:25,445 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 04:20:25,446 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 04:20:25,447 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 04:20:25,448 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 04:20:25,449 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 04:20:25,450 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 04:20:25,452 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 04:20:25,457 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 04:20:25,459 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 04:20:25,461 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 04:20:25,463 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 04:20:25,464 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 04:20:25,470 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 04:20:25,470 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 04:20:25,470 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 04:20:25,473 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 04:20:25,473 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 04:20:25,474 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 04:20:25,475 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 04:20:25,475 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 04:20:25,476 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 04:20:25,482 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 04:20:25,483 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 04:20:25,484 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 04:20:25,484 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 04:20:25,484 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 04:20:25,485 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 04:20:25,486 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 04:20:25,487 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 04:20:25,489 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 [2020-08-19 04:20:25,540 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 04:20:25,540 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 04:20:25,545 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 04:20:25,545 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 04:20:25,545 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 04:20:25,545 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 04:20:25,546 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 04:20:25,547 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 04:20:25,547 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 04:20:25,547 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 04:20:25,548 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 04:20:25,548 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 04:20:25,548 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 04:20:25,548 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 04:20:25,548 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 04:20:25,550 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 04:20:25,550 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 04:20:25,550 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 04:20:25,551 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 04:20:25,551 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 04:20:25,551 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 04:20:25,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 04:20:25,551 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 04:20:25,552 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 04:20:25,552 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 04:20:25,552 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 04:20:25,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 04:20:25,552 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 04:20:25,553 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 04:20:25,553 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=SMALLESTAMONGWIDE;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2; [2020-08-19 04:20:25,871 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 04:20:25,891 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 04:20:25,895 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 04:20:25,897 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 04:20:25,897 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 04:20:25,898 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1031.c [2020-08-19 04:20:25,970 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4cdd853b6/ee4cf1b5aa2d43918a912d569cf4a148/FLAG4b700f24a [2020-08-19 04:20:26,393 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 04:20:26,394 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1031.c [2020-08-19 04:20:26,405 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4cdd853b6/ee4cf1b5aa2d43918a912d569cf4a148/FLAG4b700f24a [2020-08-19 04:20:26,767 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4cdd853b6/ee4cf1b5aa2d43918a912d569cf4a148 [2020-08-19 04:20:26,779 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 04:20:26,781 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 04:20:26,782 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 04:20:26,783 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 04:20:26,786 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 04:20:26,787 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 04:20:26" (1/1) ... [2020-08-19 04:20:26,790 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3add5f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:20:26, skipping insertion in model container [2020-08-19 04:20:26,791 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 04:20:26" (1/1) ... [2020-08-19 04:20:26,799 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 04:20:26,820 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 04:20:27,008 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 04:20:27,012 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 04:20:27,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 04:20:27,056 INFO L208 MainTranslator]: Completed translation [2020-08-19 04:20:27,056 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:20:27 WrapperNode [2020-08-19 04:20:27,056 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 04:20:27,057 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 04:20:27,057 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 04:20:27,057 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 04:20:27,149 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:20:27" (1/1) ... [2020-08-19 04:20:27,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:20:27" (1/1) ... [2020-08-19 04:20:27,161 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:20:27" (1/1) ... [2020-08-19 04:20:27,162 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:20:27" (1/1) ... [2020-08-19 04:20:27,172 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:20:27" (1/1) ... [2020-08-19 04:20:27,177 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:20:27" (1/1) ... [2020-08-19 04:20:27,179 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:20:27" (1/1) ... [2020-08-19 04:20:27,181 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 04:20:27,182 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 04:20:27,182 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 04:20:27,182 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 04:20:27,183 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:20:27" (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 [2020-08-19 04:20:27,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 04:20:27,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 04:20:27,246 INFO L138 BoogieDeclarations]: Found implementation of procedure round_float [2020-08-19 04:20:27,246 INFO L138 BoogieDeclarations]: Found implementation of procedure isnan_float [2020-08-19 04:20:27,247 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 04:20:27,247 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 04:20:27,247 INFO L130 BoogieDeclarations]: Found specification of procedure round_float [2020-08-19 04:20:27,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-19 04:20:27,247 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-19 04:20:27,247 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-19 04:20:27,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-19 04:20:27,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-19 04:20:27,248 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-19 04:20:27,248 INFO L130 BoogieDeclarations]: Found specification of procedure isnan_float [2020-08-19 04:20:27,248 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 04:20:27,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 04:20:27,249 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 04:20:27,592 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 04:20:27,593 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-08-19 04:20:27,597 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 04:20:27 BoogieIcfgContainer [2020-08-19 04:20:27,597 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 04:20:27,598 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 04:20:27,598 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 04:20:27,602 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 04:20:27,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 04:20:26" (1/3) ... [2020-08-19 04:20:27,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e7750b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 04:20:27, skipping insertion in model container [2020-08-19 04:20:27,603 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:20:27" (2/3) ... [2020-08-19 04:20:27,603 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e7750b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 04:20:27, skipping insertion in model container [2020-08-19 04:20:27,604 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 04:20:27" (3/3) ... [2020-08-19 04:20:27,605 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1031.c [2020-08-19 04:20:27,617 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 04:20:27,626 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 04:20:27,640 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 04:20:27,667 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 04:20:27,668 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 04:20:27,668 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 04:20:27,668 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 04:20:27,668 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 04:20:27,669 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 04:20:27,669 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 04:20:27,669 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 04:20:27,694 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-08-19 04:20:27,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 04:20:27,700 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:20:27,701 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] [2020-08-19 04:20:27,701 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:20:27,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:20:27,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1659352855, now seen corresponding path program 1 times [2020-08-19 04:20:27,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:20:27,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277265066] [2020-08-19 04:20:27,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:20:27,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:27,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:20:27,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:27,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-19 04:20:27,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:27,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-19 04:20:27,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:20:27,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:20:27,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277265066] [2020-08-19 04:20:27,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:20:27,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 04:20:27,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193349791] [2020-08-19 04:20:27,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 04:20:27,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:20:27,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 04:20:27,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 04:20:27,982 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 4 states. [2020-08-19 04:20:28,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:20:28,179 INFO L93 Difference]: Finished difference Result 60 states and 78 transitions. [2020-08-19 04:20:28,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 04:20:28,181 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-08-19 04:20:28,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:20:28,192 INFO L225 Difference]: With dead ends: 60 [2020-08-19 04:20:28,193 INFO L226 Difference]: Without dead ends: 30 [2020-08-19 04:20:28,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 04:20:28,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-19 04:20:28,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-19 04:20:28,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-19 04:20:28,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-08-19 04:20:28,239 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2020-08-19 04:20:28,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:20:28,240 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-08-19 04:20:28,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 04:20:28,240 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-08-19 04:20:28,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-19 04:20:28,241 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:20:28,242 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] [2020-08-19 04:20:28,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 04:20:28,243 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:20:28,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:20:28,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1719916348, now seen corresponding path program 1 times [2020-08-19 04:20:28,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:20:28,244 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1868628538] [2020-08-19 04:20:28,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:20:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-19 04:20:28,316 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-19 04:20:28,317 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 04:20:28,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 04:20:28,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 04:20:28 BoogieIcfgContainer [2020-08-19 04:20:28,341 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 04:20:28,344 INFO L168 Benchmark]: Toolchain (without parser) took 1562.28 ms. Allocated memory was 146.3 MB in the beginning and 201.9 MB in the end (delta: 55.6 MB). Free memory was 101.5 MB in the beginning and 121.1 MB in the end (delta: -19.6 MB). Peak memory consumption was 36.0 MB. Max. memory is 7.1 GB. [2020-08-19 04:20:28,345 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 146.3 MB. Free memory was 119.5 MB in the beginning and 119.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 04:20:28,346 INFO L168 Benchmark]: CACSL2BoogieTranslator took 274.44 ms. Allocated memory is still 146.3 MB. Free memory was 101.3 MB in the beginning and 90.1 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. [2020-08-19 04:20:28,347 INFO L168 Benchmark]: Boogie Preprocessor took 124.28 ms. Allocated memory was 146.3 MB in the beginning and 201.9 MB in the end (delta: 55.6 MB). Free memory was 90.1 MB in the beginning and 179.1 MB in the end (delta: -89.0 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-08-19 04:20:28,348 INFO L168 Benchmark]: RCFGBuilder took 415.32 ms. Allocated memory is still 201.9 MB. Free memory was 179.1 MB in the beginning and 161.8 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. [2020-08-19 04:20:28,349 INFO L168 Benchmark]: TraceAbstraction took 743.11 ms. Allocated memory is still 201.9 MB. Free memory was 161.1 MB in the beginning and 121.1 MB in the end (delta: 40.0 MB). Peak memory consumption was 40.0 MB. Max. memory is 7.1 GB. [2020-08-19 04:20:28,353 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 146.3 MB. Free memory was 119.5 MB in the beginning and 119.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 274.44 ms. Allocated memory is still 146.3 MB. Free memory was 101.3 MB in the beginning and 90.1 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 124.28 ms. Allocated memory was 146.3 MB in the beginning and 201.9 MB in the end (delta: 55.6 MB). Free memory was 90.1 MB in the beginning and 179.1 MB in the end (delta: -89.0 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 415.32 ms. Allocated memory is still 201.9 MB. Free memory was 179.1 MB in the beginning and 161.8 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 743.11 ms. Allocated memory is still 201.9 MB. Free memory was 161.1 MB in the beginning and 121.1 MB in the end (delta: 40.0 MB). Peak memory consumption was 40.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 70]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 55, overapproximation of someBinaryArithmeticFLOAToperation at line 42, overapproximation of bitwiseAnd at line 22. Possible FailurePath: [L65] float x = 0.0f / 0.0f; [L66] CALL, EXPR round_float(x) [L12] __uint32_t w; [L14] int exponent_less_127; [L17] ieee_float_shape_type gf_u; [L18] gf_u.value = (x) [L19] EXPR gf_u.word [L19] (w) = gf_u.word [L22] exponent_less_127 = (int)((w & 0x7f800000) >> 23) - 127 [L24] COND FALSE !(exponent_less_127 < 23) [L40] COND TRUE exponent_less_127 == 128 [L42] return x + x; [L66] RET, EXPR round_float(x) [L66] float res = round_float(x); [L69] CALL, EXPR isnan_float(res) [L55] return x != x; [L69] RET, EXPR isnan_float(res) [L69] COND TRUE !isnan_float(res) [L70] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 34 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: 33 SDtfs, 29 SDslu, 5 SDs, 0 SdLazy, 35 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=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...