/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --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=HIGHLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/float-newlib/float_req_bl_0730c.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 22:37:13,207 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 22:37:13,211 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 22:37:13,238 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 22:37:13,239 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 22:37:13,240 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 22:37:13,242 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 22:37:13,244 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 22:37:13,246 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 22:37:13,247 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 22:37:13,249 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 22:37:13,250 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 22:37:13,251 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 22:37:13,256 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 22:37:13,257 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 22:37:13,260 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 22:37:13,261 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 22:37:13,264 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 22:37:13,266 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 22:37:13,268 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 22:37:13,272 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 22:37:13,274 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 22:37:13,276 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 22:37:13,277 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 22:37:13,283 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 22:37:13,283 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 22:37:13,284 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 22:37:13,288 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 22:37:13,289 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 22:37:13,291 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 22:37:13,291 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 22:37:13,292 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 22:37:13,293 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 22:37:13,294 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 22:37:13,296 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 22:37:13,296 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 22:37:13,297 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 22:37:13,297 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 22:37:13,297 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 22:37:13,308 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 22:37:13,309 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 22:37:13,310 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 [2020-09-24 22:37:13,366 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 22:37:13,366 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 22:37:13,369 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 22:37:13,370 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 22:37:13,370 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 22:37:13,370 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 22:37:13,370 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 22:37:13,370 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 22:37:13,371 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 22:37:13,371 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 22:37:13,371 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 22:37:13,371 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 22:37:13,371 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 22:37:13,372 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 22:37:13,373 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 22:37:13,373 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 22:37:13,373 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 22:37:13,373 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 22:37:13,373 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 22:37:13,374 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 22:37:13,374 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 22:37:13,374 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 22:37:13,374 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 22:37:13,375 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 22:37:13,375 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 22:37:13,375 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 22:37:13,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 22:37:13,376 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 22:37:13,376 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 22:37:13,376 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement 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=HIGHLEXORDER;log-additional-information=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=HIGHLEXORDER;log-additional-information=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=HIGHLEXORDER;log-additional-information=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=HIGHLEXORDER;log-additional-information=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=HIGHLEXORDER;log-additional-information=true; [2020-09-24 22:37:13,850 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 22:37:13,871 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 22:37:13,878 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 22:37:13,880 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 22:37:13,882 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 22:37:13,883 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_0730c.c [2020-09-24 22:37:13,964 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/84434b129/32f3807c58774391804199af76af69ab/FLAG6b3b8eb23 [2020-09-24 22:37:14,494 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 22:37:14,495 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_0730c.c [2020-09-24 22:37:14,506 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/84434b129/32f3807c58774391804199af76af69ab/FLAG6b3b8eb23 [2020-09-24 22:37:14,833 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/84434b129/32f3807c58774391804199af76af69ab [2020-09-24 22:37:14,851 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 22:37:14,859 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 22:37:14,863 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 22:37:14,863 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 22:37:14,868 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 22:37:14,869 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 10:37:14" (1/1) ... [2020-09-24 22:37:14,875 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@377d8449 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:37:14, skipping insertion in model container [2020-09-24 22:37:14,875 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 10:37:14" (1/1) ... [2020-09-24 22:37:14,886 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 22:37:14,918 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 22:37:15,237 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 22:37:15,243 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 22:37:15,279 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 22:37:15,308 INFO L208 MainTranslator]: Completed translation [2020-09-24 22:37:15,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:37:15 WrapperNode [2020-09-24 22:37:15,309 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 22:37:15,310 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 22:37:15,310 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 22:37:15,310 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 22:37:15,409 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:37:15" (1/1) ... [2020-09-24 22:37:15,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:37:15" (1/1) ... [2020-09-24 22:37:15,423 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:37:15" (1/1) ... [2020-09-24 22:37:15,424 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:37:15" (1/1) ... [2020-09-24 22:37:15,437 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:37:15" (1/1) ... [2020-09-24 22:37:15,447 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:37:15" (1/1) ... [2020-09-24 22:37:15,449 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:37:15" (1/1) ... [2020-09-24 22:37:15,453 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 22:37:15,454 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 22:37:15,454 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 22:37:15,454 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 22:37:15,455 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:37:15" (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 [2020-09-24 22:37:15,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 22:37:15,542 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 22:37:15,543 INFO L138 BoogieDeclarations]: Found implementation of procedure __ieee754_sqrtf [2020-09-24 22:37:15,543 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-09-24 22:37:15,543 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 22:37:15,543 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 22:37:15,544 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-09-24 22:37:15,544 INFO L130 BoogieDeclarations]: Found specification of procedure __ieee754_sqrtf [2020-09-24 22:37:15,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-24 22:37:15,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-09-24 22:37:15,544 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-24 22:37:15,544 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-24 22:37:15,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-24 22:37:15,545 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-09-24 22:37:15,545 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-09-24 22:37:15,545 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 22:37:15,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 22:37:15,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 22:37:16,060 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 22:37:16,061 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-09-24 22:37:16,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 10:37:16 BoogieIcfgContainer [2020-09-24 22:37:16,076 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 22:37:16,079 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 22:37:16,079 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 22:37:16,083 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 22:37:16,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 10:37:14" (1/3) ... [2020-09-24 22:37:16,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21c62b7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 10:37:16, skipping insertion in model container [2020-09-24 22:37:16,085 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 10:37:15" (2/3) ... [2020-09-24 22:37:16,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21c62b7c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 10:37:16, skipping insertion in model container [2020-09-24 22:37:16,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 10:37:16" (3/3) ... [2020-09-24 22:37:16,090 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_0730c.c [2020-09-24 22:37:16,102 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 22:37:16,115 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 22:37:16,136 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 22:37:16,166 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 22:37:16,166 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 22:37:16,166 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 22:37:16,166 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 22:37:16,166 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 22:37:16,166 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 22:37:16,166 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 22:37:16,166 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 22:37:16,190 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states. [2020-09-24 22:37:16,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-24 22:37:16,200 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:37:16,201 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:37:16,202 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:37:16,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:37:16,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1619390018, now seen corresponding path program 1 times [2020-09-24 22:37:16,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:37:16,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893447197] [2020-09-24 22:37:16,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:37:16,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:37:16,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:37:16,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:37:16,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-09-24 22:37:16,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:37:16,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 102 [2020-09-24 22:37:16,468 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:37:16,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:37:16,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-09-24 22:37:16,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:37:16,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 22:37:16,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 22:37:16,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:37:16,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:37:16,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:37:16,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-24 22:37:16,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:37:16,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-24 22:37:16,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:37:16,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:37:16,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 22:37:16,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:37:16,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:37:16,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 22:37:16,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 22:37:16,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 22:37:16,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 22:37:16,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-24 22:37:16,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 22:37:16,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-24 22:37:16,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: HIGHLEXORDER [2020-09-24 22:37:16,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 22:37:16,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 22:37:16,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 22:37:16,653 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 22:37:16,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 22:37:16,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893447197] [2020-09-24 22:37:16,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 22:37:16,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-24 22:37:16,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566851942] [2020-09-24 22:37:16,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 22:37:16,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 22:37:16,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 22:37:16,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-24 22:37:16,715 INFO L87 Difference]: Start difference. First operand 121 states. Second operand 4 states. [2020-09-24 22:37:17,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 22:37:17,074 INFO L93 Difference]: Finished difference Result 220 states and 261 transitions. [2020-09-24 22:37:17,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 22:37:17,076 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-09-24 22:37:17,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 22:37:17,107 INFO L225 Difference]: With dead ends: 220 [2020-09-24 22:37:17,107 INFO L226 Difference]: Without dead ends: 113 [2020-09-24 22:37:17,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 22:37:17,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-24 22:37:17,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2020-09-24 22:37:17,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-09-24 22:37:17,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 124 transitions. [2020-09-24 22:37:17,179 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 124 transitions. Word has length 35 [2020-09-24 22:37:17,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 22:37:17,180 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 124 transitions. [2020-09-24 22:37:17,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 22:37:17,181 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 124 transitions. [2020-09-24 22:37:17,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-24 22:37:17,183 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 22:37:17,183 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 22:37:17,184 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 22:37:17,184 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 22:37:17,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 22:37:17,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1569420762, now seen corresponding path program 1 times [2020-09-24 22:37:17,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 22:37:17,185 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933584824] [2020-09-24 22:37:17,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 22:37:17,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 22:37:17,233 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 22:37:17,233 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 22:37:17,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 22:37:17,264 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 10:37:17 BoogieIcfgContainer [2020-09-24 22:37:17,265 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 22:37:17,268 INFO L168 Benchmark]: Toolchain (without parser) took 2414.37 ms. Allocated memory was 138.9 MB in the beginning and 233.8 MB in the end (delta: 94.9 MB). Free memory was 102.1 MB in the beginning and 195.0 MB in the end (delta: -92.9 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-09-24 22:37:17,269 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 22:37:17,270 INFO L168 Benchmark]: CACSL2BoogieTranslator took 446.19 ms. Allocated memory is still 138.9 MB. Free memory was 101.5 MB in the beginning and 89.6 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. [2020-09-24 22:37:17,271 INFO L168 Benchmark]: Boogie Preprocessor took 143.51 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 89.6 MB in the beginning and 178.5 MB in the end (delta: -88.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-09-24 22:37:17,272 INFO L168 Benchmark]: RCFGBuilder took 622.45 ms. Allocated memory is still 201.9 MB. Free memory was 178.5 MB in the beginning and 150.3 MB in the end (delta: 28.3 MB). Peak memory consumption was 28.3 MB. Max. memory is 7.1 GB. [2020-09-24 22:37:17,273 INFO L168 Benchmark]: TraceAbstraction took 1185.94 ms. Allocated memory was 201.9 MB in the beginning and 233.8 MB in the end (delta: 32.0 MB). Free memory was 149.6 MB in the beginning and 195.0 MB in the end (delta: -45.4 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 22:37:17,277 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 446.19 ms. Allocated memory is still 138.9 MB. Free memory was 101.5 MB in the beginning and 89.6 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 143.51 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 89.6 MB in the beginning and 178.5 MB in the end (delta: -88.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 622.45 ms. Allocated memory is still 201.9 MB. Free memory was 178.5 MB in the beginning and 150.3 MB in the end (delta: 28.3 MB). Peak memory consumption was 28.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1185.94 ms. Allocated memory was 201.9 MB in the beginning and 233.8 MB in the end (delta: 32.0 MB). Free memory was 149.6 MB in the beginning and 195.0 MB in the end (delta: -45.4 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 106]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 105, overapproximation of bitwiseAnd at line 24, overapproximation of someUnaryFLOAToperation at line 101, overapproximation of someBinaryArithmeticFLOAToperation at line 27. Possible FailurePath: [L12] static const float one_sqrt = 1.0, tiny_sqrt = 1.0e-30; [L101] float x = -0.0f; [L102] CALL, EXPR __ieee754_sqrtf(x) [L15] float z; [L16] __uint32_t r, hx; [L17] __int32_t ix, s, q, m, t, i; [L20] ieee_float_shape_type gf_u; [L21] gf_u.value = (x) [L22] EXPR gf_u.word [L22] (ix) = gf_u.word [L24] hx = ix & 0x7fffffff [L26] COND TRUE !((hx) < 0x7f800000L) [L27] return x * x + x; [L102] RET, EXPR __ieee754_sqrtf(x) [L102] float res = __ieee754_sqrtf(x); [L105] EXPR res == -0.0f && __signbit_float(res) == 1 [L105] COND TRUE !(res == -0.0f && __signbit_float(res) == 1) [L106] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 121 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.0s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 128 SDtfs, 27 SDslu, 98 SDs, 0 SdLazy, 132 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=121occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 79 NumberOfCodeBlocks, 79 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 34 ConstructedInterpolants, 0 QuantifiedInterpolants, 2074 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...