/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=WIDESTAMONGSMALL --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_1072c.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 23:29:05,279 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 23:29:05,281 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 23:29:05,306 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 23:29:05,306 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 23:29:05,307 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 23:29:05,309 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 23:29:05,311 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 23:29:05,312 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 23:29:05,313 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 23:29:05,314 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 23:29:05,315 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 23:29:05,316 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 23:29:05,317 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 23:29:05,318 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 23:29:05,319 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 23:29:05,320 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 23:29:05,321 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 23:29:05,322 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 23:29:05,324 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 23:29:05,325 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 23:29:05,327 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 23:29:05,328 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 23:29:05,329 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 23:29:05,331 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 23:29:05,331 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 23:29:05,331 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 23:29:05,332 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 23:29:05,333 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 23:29:05,334 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 23:29:05,334 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 23:29:05,335 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 23:29:05,335 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 23:29:05,336 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 23:29:05,337 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 23:29:05,337 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 23:29:05,338 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 23:29:05,338 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 23:29:05,338 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 23:29:05,339 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 23:29:05,340 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 23:29:05,341 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 23:29:05,364 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 23:29:05,365 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 23:29:05,366 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 23:29:05,366 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 23:29:05,366 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 23:29:05,367 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 23:29:05,367 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 23:29:05,367 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 23:29:05,367 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 23:29:05,367 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 23:29:05,368 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 23:29:05,368 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 23:29:05,368 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 23:29:05,368 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 23:29:05,368 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 23:29:05,369 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 23:29:05,369 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 23:29:05,369 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 23:29:05,369 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 23:29:05,369 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 23:29:05,370 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 23:29:05,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 23:29:05,370 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 23:29:05,370 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 23:29:05,371 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 23:29:05,371 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 23:29:05,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 23:29:05,371 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 23:29:05,371 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 23:29:05,372 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=WIDESTAMONGSMALL;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; [2020-08-18 23:29:05,682 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 23:29:05,702 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 23:29:05,708 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 23:29:05,710 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 23:29:05,710 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 23:29:05,711 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-newlib/float_req_bl_1072c.c [2020-08-18 23:29:05,772 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/652331228/c0f98ae6019c4adaa4a908b1165af128/FLAGc443aa61e [2020-08-18 23:29:06,219 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 23:29:06,220 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-newlib/float_req_bl_1072c.c [2020-08-18 23:29:06,228 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/652331228/c0f98ae6019c4adaa4a908b1165af128/FLAGc443aa61e [2020-08-18 23:29:06,578 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/652331228/c0f98ae6019c4adaa4a908b1165af128 [2020-08-18 23:29:06,586 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 23:29:06,588 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 23:29:06,589 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 23:29:06,589 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 23:29:06,592 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 23:29:06,593 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:29:06" (1/1) ... [2020-08-18 23:29:06,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c8d6227 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:06, skipping insertion in model container [2020-08-18 23:29:06,596 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:29:06" (1/1) ... [2020-08-18 23:29:06,604 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 23:29:06,624 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 23:29:06,800 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 23:29:06,804 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 23:29:06,830 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 23:29:06,851 INFO L208 MainTranslator]: Completed translation [2020-08-18 23:29:06,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:06 WrapperNode [2020-08-18 23:29:06,852 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 23:29:06,853 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 23:29:06,853 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 23:29:06,853 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 23:29:06,941 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:06" (1/1) ... [2020-08-18 23:29:06,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:06" (1/1) ... [2020-08-18 23:29:06,955 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:06" (1/1) ... [2020-08-18 23:29:06,955 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:06" (1/1) ... [2020-08-18 23:29:06,967 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:06" (1/1) ... [2020-08-18 23:29:06,973 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:06" (1/1) ... [2020-08-18 23:29:06,975 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:06" (1/1) ... [2020-08-18 23:29:06,978 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 23:29:06,979 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 23:29:06,979 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 23:29:06,979 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 23:29:06,980 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:06" (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 23:29:07,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 23:29:07,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 23:29:07,054 INFO L138 BoogieDeclarations]: Found implementation of procedure trunc_float [2020-08-18 23:29:07,054 INFO L138 BoogieDeclarations]: Found implementation of procedure __signbit_float [2020-08-18 23:29:07,054 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 23:29:07,054 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 23:29:07,054 INFO L130 BoogieDeclarations]: Found specification of procedure trunc_float [2020-08-18 23:29:07,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 23:29:07,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-08-18 23:29:07,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 23:29:07,055 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 23:29:07,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 23:29:07,055 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-08-18 23:29:07,055 INFO L130 BoogieDeclarations]: Found specification of procedure __signbit_float [2020-08-18 23:29:07,056 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 23:29:07,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 23:29:07,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 23:29:07,427 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 23:29:07,428 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-08-18 23:29:07,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:29:07 BoogieIcfgContainer [2020-08-18 23:29:07,432 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 23:29:07,433 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 23:29:07,433 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 23:29:07,436 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 23:29:07,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:29:06" (1/3) ... [2020-08-18 23:29:07,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f91874b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:29:07, skipping insertion in model container [2020-08-18 23:29:07,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:06" (2/3) ... [2020-08-18 23:29:07,438 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f91874b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:29:07, skipping insertion in model container [2020-08-18 23:29:07,438 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:29:07" (3/3) ... [2020-08-18 23:29:07,442 INFO L109 eAbstractionObserver]: Analyzing ICFG float_req_bl_1072c.c [2020-08-18 23:29:07,453 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 23:29:07,461 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 23:29:07,479 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 23:29:07,505 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 23:29:07,505 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 23:29:07,505 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 23:29:07,505 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 23:29:07,505 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 23:29:07,505 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 23:29:07,506 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 23:29:07,506 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 23:29:07,524 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-08-18 23:29:07,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 23:29:07,530 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:07,531 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:29:07,531 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:07,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:07,537 INFO L82 PathProgramCache]: Analyzing trace with hash 753691903, now seen corresponding path program 1 times [2020-08-18 23:29:07,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:07,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813931427] [2020-08-18 23:29:07,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:07,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:07,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:07,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:07,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-18 23:29:07,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:07,765 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 23:29:07,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813931427] [2020-08-18 23:29:07,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:29:07,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 23:29:07,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794271827] [2020-08-18 23:29:07,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 23:29:07,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:07,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 23:29:07,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 23:29:07,793 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 4 states. [2020-08-18 23:29:08,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:08,024 INFO L93 Difference]: Finished difference Result 68 states and 93 transitions. [2020-08-18 23:29:08,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 23:29:08,027 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-08-18 23:29:08,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:08,037 INFO L225 Difference]: With dead ends: 68 [2020-08-18 23:29:08,038 INFO L226 Difference]: Without dead ends: 34 [2020-08-18 23:29:08,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 23:29:08,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-18 23:29:08,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-08-18 23:29:08,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-18 23:29:08,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-08-18 23:29:08,094 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 18 [2020-08-18 23:29:08,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:08,094 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-08-18 23:29:08,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 23:29:08,095 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-08-18 23:29:08,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 23:29:08,096 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:08,096 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:29:08,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 23:29:08,097 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:08,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:08,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1111015325, now seen corresponding path program 1 times [2020-08-18 23:29:08,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:08,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819390497] [2020-08-18 23:29:08,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:08,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 23:29:08,238 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 23:29:08,238 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 23:29:08,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 23:29:08,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 11:29:08 BoogieIcfgContainer [2020-08-18 23:29:08,263 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 23:29:08,266 INFO L168 Benchmark]: Toolchain (without parser) took 1677.04 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 103.7 MB in the beginning and 118.6 MB in the end (delta: -14.9 MB). Peak memory consumption was 47.5 MB. Max. memory is 7.1 GB. [2020-08-18 23:29:08,267 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 23:29:08,268 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.63 ms. Allocated memory is still 140.5 MB. Free memory was 103.5 MB in the beginning and 92.6 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-08-18 23:29:08,269 INFO L168 Benchmark]: Boogie Preprocessor took 125.79 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 92.6 MB in the beginning and 180.2 MB in the end (delta: -87.6 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-08-18 23:29:08,270 INFO L168 Benchmark]: RCFGBuilder took 453.52 ms. Allocated memory is still 202.9 MB. Free memory was 180.2 MB in the beginning and 159.4 MB in the end (delta: 20.8 MB). Peak memory consumption was 20.8 MB. Max. memory is 7.1 GB. [2020-08-18 23:29:08,271 INFO L168 Benchmark]: TraceAbstraction took 829.65 ms. Allocated memory is still 202.9 MB. Free memory was 159.4 MB in the beginning and 118.6 MB in the end (delta: 40.8 MB). Peak memory consumption was 40.8 MB. Max. memory is 7.1 GB. [2020-08-18 23:29:08,275 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 263.63 ms. Allocated memory is still 140.5 MB. Free memory was 103.5 MB in the beginning and 92.6 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 125.79 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 92.6 MB in the beginning and 180.2 MB in the end (delta: -87.6 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 453.52 ms. Allocated memory is still 202.9 MB. Free memory was 180.2 MB in the beginning and 159.4 MB in the end (delta: 20.8 MB). Peak memory consumption was 20.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 829.65 ms. Allocated memory is still 202.9 MB. Free memory was 159.4 MB in the beginning and 118.6 MB in the end (delta: 40.8 MB). Peak memory consumption was 40.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 67]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 66, overapproximation of bitwiseAnd at line 19, overapproximation of someBinaryArithmeticFLOAToperation at line 38. Possible FailurePath: [L62] float x = 0.0f; [L63] 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; [L63] RET, EXPR trunc_float(x) [L63] float res = trunc_float(x); [L66] EXPR res == 0.0f && __signbit_float(res) == 0 [L66] COND TRUE !(res == 0.0f && __signbit_float(res) == 0) [L67] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 34 SDtfs, 29 SDslu, 5 SDs, 0 SdLazy, 41 SolverSat, 12 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 37 NumberOfCodeBlocks, 37 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 17 ConstructedInterpolants, 0 QuantifiedInterpolants, 646 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...